Service Handbook PURY-P400, P500YMF-C Service Handbook PURY-P400, P500YMF-C HEAD OFFICE MITSUBISHI DENKI BLDG. MARUNOUCHI TOKYO 100-0005 TELEX J24532 CABLE MELCO TOKYO Issued in Aug 2002 F1105-214(MDOC) Printed in Japan New publication effective Aug 2002 Specifications subject to change without notice.
Contents 1 PRECAUTIONS FOR DEVICES THAT USE R407C REFRIGERANT ..... 3 [1] Storage of Piping Material ................................................................. 4 [2] Piping Machining ............................................................................... 5 [3] Brazing .............................................................................................. 6 [4] Airtightness Test ................................................................................ 7 [5] Vacuuming ...........
Contents 1 PRECAUTIONS FOR DEVICES THAT USE R407C REFRIGERANT ..... 3 [1] Storage of Piping Material ................................................................. 4 [2] Piping Machining ............................................................................... 5 [3] Brazing .............................................................................................. 6 [4] Airtightness Test ................................................................................ 7 [5] Vacuuming ...........
Safety precautions Before installation and electric work ▲ ▲ ▲ ▲ ▲ Before installing the unit, make sure you read all the “Safety precautions”. The “Safety precautions” provide very important points regarding safety. Make sure you follow them. This equipment may not be applicable to EN61000-3-2: 1995 and EN61000-3-3: 1995. This equipment may have an adverse effect on equipment on the same electrical supply system. Please report to or take consent by the supply authority before connection to the system.
1 PRECAUTIONS FOR DEVICES THAT USE R407C REFRIGERANT Caution Do not use the existing refrigerant piping. Use a vacuum pump with a reverse flow check valve. • • The old refrigerant and refrigerator oil in the existing piping contains a large amount of chlorine which may cause the refrigerator oil of the new unit to deteriorate. Do not use the following tools that have been used with conventional refrigerants.
[1] Storage of Piping Material (1) Storage location Store the pipes to be used indoors. (Warehouse at site or owner’s warehouse) Storing them outdoors may cause dirt, waste, or water to infiltrate. (2) Pipe sealing before storage Both ends of the pipes should be sealed until immediately before brazing. Wrap elbows and T’s in plastic bags for storage. * The new refrigerator oil is 10 times more hygroscopic than the conventional refrigerator oil (such as Suniso).
[2] Piping Machining Use ester oil, ether oil or alkylbenzene (small amount) as the refrigerator oil to coat flange connections. Use only the necessary minimum quantity of oil ! Reason : 1. The refrigerator oil used for the equipment is highly hygroscopic and may introduce water inside. Notes : • Introducing a great quantity of mineral oil into the refrigerant circuit may also cause a compressor failure. • Do not use oils other than ester oil, ether oil or alkylbenzene.
[3] Brazing No changes from the conventional method, but special care is required so that foreign matter (ie. oxide scale, water, dirt, etc.) does not enter the refrigerant circuit. Example : Inner state of brazed section When non-oxide brazing was not used When non-oxide brazing was used Items to be strictly observed : 1. Do not conduct refrigerant piping work outdoors on a rainy day. 2. Apply non-oxide brazing. 3.
[4] Airtightness Test No changes from the conventional method. Note that a refrigerant leakage detector for R22 cannot detect R407C leakage. Halide torch R22 leakage detector Items to be strictly observed : 1. Pressurize the equipment with nitrogen up to the design pressure and then judge the equipment’s airtightness, taking temperature variations into account. 2. When investigating leakage locations using a refrigerant, be sure to use R407C. 3. Ensure that R407C is in a liquid state when charging.
[6] Charging of Refrigerant R407C must be in a liquid state when charging, because it is a non-azeotropic refrigerant. For a cylinder with a syphon attached For a cylinder without a syphon attached Cylinder Cylinder Cylinder color identification R407C-Gray R410A-Pink Charged with liquid refrigerant Valve Valve Liquid Liquid Reasons : 1. R407C is a mixture of 3 refrigerants, each with a different evaporation temperature.
2 COMPONENT OF EQUIPMENT [1] Appearance of Components Outdoor unit • PURY-P400·500YMF-C Propeller fan Fan motor Propeller fan Fan motor Heat exchanger(rear) Heat exchanger(front) Compressor Control box P400 TYPE P500 TYPE SV block 1 CS circuit 4–way valve Accumulator 4–way valve CV block 1 Compressor CV block 2 SV block 2 Drier Compressor –9–
Controller Box RELAY board FANCON board (for MF3) Choke coil (L2) MAIN board Magnetic contactor (52C2) INV board SNB board Diode stack (DS) FANCON board (for MF2) G/A board Inteligent Power Module (IPM) Overload relay (51C2) Y-C board Magnetic contactor (52F) Noise filter (NP) Magnetic contactor (52C1) –10– Capacitor (C2, C3) (Smoothing capacitor)
MAIN board • PUHY / PURY CNTR CNFC1 CNVCC4 Power source for control(5V) CNS1 CNS2 CN40 CNVCC3 Power Source for control 1-2 30V 1-3 30V 4-6 12V 5-6 5V CN41 CN51 Indication distance 3-4 Compressor ON/OFF 3-5 Trouble CNRS3 Serial transmission to INV board CN3D CN3S CN3N LD1 Service LED CN20 Power supply 3 L1 1N SW4 SW3 SW2 –11– SWU2 SWU1 SW1
INV board CNVDC 1-4 DC-560V CN15V2 Power supply for IPM control CNVCC4 Power supply (5V) CNL2 Choke coil CNR CNVCC2 Power supply 1-2 30V, 1-3 30V 4-6 12V, 5-6 5V CN52C Control for 52C CNDR2 Out put to G/A board CNFAN Control for MF1 CNAC2 Power source 1 L2 3N 5G CNTH SW1 CNRS2 Serial transmission to MAIN board –12– CNACCT
FANCON board CNPOW CNFAN CNFC2 G/A board CNE CNDC1 CN15V1 CNIPM1 CNDR1 –13–
SNB board Y-C board –14–
BC controller CNTR CN12 Power supply 1 EARTH 3N 5L CN02 M-NET transmission CN03 SW4 SW5 SW2 –15– SW1
RELAY 10 board RELAY 4 board –16–
63H1 CV1a 21S4b –17– CS Circuit Comp1 TH11 SV1 CP1 63HS CJ1 ST6 O/S ST2 21S4a CJ3 TH4 ST4 63H2 CV1b TH2 ST8 Comp2 CP3a SV22 SV32 TH12 SV6a SV4a Drier TH9 CP2 SLEV ST5 SA *SV22, 32: P500 only TH3 ST3 ST9 CP3b MA 63LS CJ2 CV8a CV9a TH7 SV6 CV Block 1 ST14 HEXf1 HEXf2 HEXf3 CV10a ST13 HEXb1 ST12 ST11 TH6 SV3 SV5 SV4 SV Block 1 ST15 Orifice CV5a CV4a CV2a CV3a CV6a CV7a SV8 HEXb2 HEXf4 SV7 SV Block 2 CV6b CV2b CV3b CV5b CV Block 2 CV4b CV7b TH5 B
CMB-P108, 1010, 1013, 1016V-FA Check valve block TH16 LEV3 Gas/liquid separator SVM1 PS1 TH12 TH11 LEV1 PS3 TH15 Solenoid valve block SVM2 : : : : : : –18– Solenoid valve Orifice Capillary Check valve Thermal sensor Strainer
CMB-P108V-FB Check valve block LEV3a CP TH22 Solenoid valve block TH25 : : : : : : –19– Solenoid valve Orifice Capillary Check valve Thermal sensor Strainer
[3] Electrical Wiring Diagram PURY-P400·500YMF-C –20–
TH16 TH15 TH12 TH11 PS3 1 2 3 CN11 2 4 3 CN05 1 2 3 4 5 6 LEV1 CN07 1 2 3 4 5 6 CN12 1 3 5 LEV3 1 3 1 CN46 3 1 CN36 7 5 3 1 CN31 7 5 3 1 CN30 7 5 3 1 CN29 7 5 3 1 CN28 7 5 3 1 CN27 7 5 3 1 CN26 3 F01 250VAC 6.
–22– TH16 TH15 TH12 TH11 PS3 PS1 1 2 3 1 2 4 3 2 1 8 7 6 5 4 3 2 1 1 2 3 1 2 3 CN11 CN10 CN13 CNP3 CNP1 LEV1 LEV3 Note1: TB02 is terminal block for transmission. Never connect power line to it. CN05 1 2 3 4 5 6 1 CN12 3 5 F01 250VAC 6.
TH15 TH12 4 3 2 1 8 CN11 CN07 LEV3 1 2 3 4 5 6 CN12 1 3 5 1 3 1 7 5 3 1 CN31 7 5 3 1 CN30 7 5 3 CN29 7 5 3 1 CN28 7 5 3 1 CN27 7 5 3 1 CN26 F01 250VAC 6.
[4] Standard Operation Data 1 Cooling operation Outdoor unit Items PURY-P400YMF-C PURY-P500YMF-C 27.0/19 27.0/19 35.0/24.0 35.0/24.0 5 5 5 5 Indoor DB/WB Ambient temp. Outdoor Quantity Set Indoor unit Condition Quantity in operation - Model 100 100 Main pipe Piping Branch pipe LEV opening Outdoor unit Pressure 50 50 125 125 5 10 m 10 10 10 10 10 55 - Hi Hi 125 25 10 10 10 Hi Hi 55 Hi Hi Hi Hi Hi Hi Refrigerant volume kg 27.1 29.2 Total current A 27.
2 Heating operation Outdoor unit Items PURY-P400YMF-C PURY-P500YMF-C 20.0/- 20.0/- 7.0/6.0 7.0/6.0 5 5 5 5 Indoor Ambient temp. DB/WB Outdoor Quantity Set Indoor unit Condition Quantity in operation 100 - Model 100 Main pipe Piping Branch pipe Outdoor unit LEV opening Pressure 50 50 125 125 5 10 m 10 - Hi Hi 125 10 10 25 10 10 10 10 10 Hi Hi 10 55 Hi Hi Hi Hi Hi Hi Refrigerant volume kg 27.1 29.2 Total current A 25.6/24.3/23.4 32.1/30.5/29.
[5] Function of Dip SW and Rotary SW (1) Outdoor unit PURY-P400·500YMF-C. 1 Variable capacity unit MAIN board Switch Function SWU 1 ~ 2 1~8 SW1 9 ~ 10 1 2 3 4 SW2 5 6 7 8 9 10 1 2 3 4 SW3 5 6 7 8 9 10 1 2 SW4 3 4 5 6 7 8 9 10 Unit Address Setting For self diagnosis/ operation monitoring Centralized Control Switch Deletion of connection information. Function According to Switch Operation When Off When On Set on 51 ~ 100 with the rotary switch.
(2) Indoor unit DIP SW1, 3 Switch Operation by SW OFF ON SW name Switch set timing OFF ON Indoor unit inlet Built in remote controller Clogged filter detect. None Provided Filter duration 100h 2500h Ineffective Effective 1 Room temp. sensor position 2 3 4 OA intake 5 Remote display select. Fan output display Thermo. ON signal display 6 Humidifier control At stationary heating Always at heat. 7 Heating thermo. OFF airflow Very low speed Low speed 8 Heating thermo.
Setting of DIP SW4 Setting of DIP SW5 Model Circuit board used SW4 1 2 3 4 PMFY-P-VBM-A ON OFF ON OFF PLFY-P-VLMD-A – – – – ON OFF ON OFF OFF OFF OFF ON ON OFF OFF ON PCFY-P-VGM-A OFF ON OFF ON PKFY-P-VGM-A OFF OFF ON ON PDFY-P20 ~ 80VM-A PLFY-P40 ~ 63VKM-A PLFY-P80 ~ 125VKM-A Phase control PKFY-P-VAM-A – – – – PEFY-P20 ~ 80VMM-A ON ON OFF OFF PFFY-P-VLEM-A, P-VLRM-A OFF OFF OFF – PEFY-P20 ~ 32VML-A ON ON ON – OFF OFF OFF – ON OFF OFF – P
3 TEST RUN [1] Before Test Run (1) Check points before test run 1 Neither refrigerant leak nor loose power source/ transmission lines should be found. 2 Confirm that the resistance between the power source terminal block and the ground exceeds 2MΩ by measuring it with a DC 500 V megger. Do not run if it is lower than 2MΩ. Note: Never apply the megger to the MAIN board. If applied, the MAIN board will be broken. Confirm that the Ball valve at gas and liquid, oil balance sides are fully opened.
(3) Check points for test run when mounting options Built-in optional parts Mounting of drain water lifting-up mechanism Content of test run Check point 1 Release connector of pump circuit, Local remote controller displays code No. check error detection by pouring water “2503”, and the mechanism stops. into drain pan water inlet. No overflow from drain pan. 2 After that, connect connector of circuit. Drain water comes out by operations of drain pump.
(5) Check points for system structure In the case of the PURY-P400·500 YMF-C Check points from installation work to test run. Classification Installation and piping Power source wiring Portion Check item Trouble 1 Instruction for selecting combination of outdoor unit, and Not operate. indoor unit followed? (Maximum number of indoor units which can be connected, connecting model name, and total capacity.
CENTRALLY CONTROLLED ON OFF DAILY AUTO OFF CLOCK REMAINDER CHECK 1Hr. CENTRALLY CONTROLLED ˚C ON OFF DAILY AUTO OFF FILTER 1Hr. ˚C CLOCK FILTER REMAINDER CHECK CHECK MODE CHECK MODE TEST RUN STAND BY DEFROST ˚C ERROR CODE TEMP 1 2 TEST RUN STAND BY DEFROST ˚C ERROR CODE TEMP ON/OFF CLOCK ON OFF 3 NOT AVAILABLE LIMIT TEMP. NOT AVAILABLE LIMIT TEMP.
[2] Test Run Method Operation procedure 1 Turn on universal power supply at least 12 hours before starting → Displaying “HO” on display panel for about two minutes 2 Press TEST RUN button twice → Displaying “TEST RUN’’ on display panel 3 Press 4 Press select button to change from cooling to heating operation, and vice versa → Make sure that warm or cold air is blowing out 5 Press 6 Press 7 Make sure that indoor unit fans operate normally 8 Make sure that interlocking devices such as ventilat
4 GROUPING REGISTRATION OF INDOOR UNITS WITH M-NET REMOTE CONTROLLER (1) Switch function • The switch operation to register with the remote controller is shown below: CENTRALLY CONTROLLED 1Hr ˚C ON OFF DAILY AUTO OFF CLOCK FILTER REMAINDER CHECK CHECK MODE TEST RUN STAND BY DEFROST C Switch to assign indoor unit address ˚C ERROR CODE NOT AVAILABLE TEMP LIMIT TEMP.
(2) Attribute display of unit • At the group registration and the confirmation/deletion of registration/connection information, the type (attribute) of the unit is displayed with two English characters.
(3) Group registration of indoor unit 1) Registration method • Group registration of indoor unit ........................................................................ 1 The indoor unit to be controlled by a remote controller is registered on the remote controller. [Registration procedure] 1 With the remote controller under stopping or at the display of “HO”, continuously press the FILTER + switch (A + B) at the same time for 2 seconds to change to the registration mode. (See the figure below.
2) Method of retrieval/confirmation • Retrieval/confirmation of group registration information on indoor unit .............. 2 The address of the indoor unit being registered on the remote controller is displayed. [Operation procedure] 1 With the remote controller under stopping or at the display of “HO”, continuously press the FILTER + switch (A + B) at the same time for 2 seconds to change to the registration mode. 2 In order to confirm the indoor unit address already registered, press switch (E).
• Registered (Alternative display) TEMP ON/OFF CLOCK ON OFF FILTER CHECK TEST PAR-F27MEA TIMER SET ▲ 1+2 (Alternative display) 1 Set the address 2 Press the switch for confirmation (E) * • No registration Same display will appear when the unit of “007” is not existing. ▼ ˚C ERROR CODE OA UNIT ADDRESS NO 3) Method of deletion • Deletion of group registration information of indoor unit ......................................
4) Deletion of information on address not existing • Deletion of information on address not existing ................................................... 5 This operation is to be conducted when “6607” error (No ACK error) is displayed on the remote controller caused by the miss setting at test run, or due to the old memory remained at the alteration/modification of group composition, and the address not existing will be deleted.
5 CONTROL [1] Control of Outdoor Unit [1]- 1 PURY-P400·500 YMF-C (1) Initial processing • When turning on power source, initial processing of microcomputer is given top priority. • During initial processing, control processing corresponding to operation signal is suspended. The control processing is resumed after initial processing is completed. (Initial processing: Data processing in microcomputer and initial setting of each LEV opening, requiring approx. 3 minutes at the maximum.
• The operating temperature is 124°C (No. 1 compressor) or 115°C (No. 2 compressor). 4) Compressor frequency control 1 Ordinary control The ordinary control is performed after the following times have passed. • 30 seconds after the start of the compressor or 30 seconds after the completion of defrosting. • 30 seconds after frequency control operation by means off the discharge temperature or the high pressure.
2) Bypass solenoid valves (SV1, SV4) [Both SV1 and SV4 are on (open)] SV4a SV1 Item ON OFF ON OFF ON for 4 minutes — Compressor stopped during cooling or heating mode ON — After operation has been stopped ON for 3 minutes — During defrosting ((*1) in Fig below) ON Normally ON ON during oil recovery operation after continuous low-frequency compressor operation.
(5) Oil return control (Electronic expansion valve (SLEV)) • The amount of opening of the oil-return LEV (SLEV) is determined as follows: in cooling, by the operating capacity of the No. 1 compressor and the ambient temperature; in heating, by the operating capacity of the No. 1 compressor. • It is opened (64pulses) when both compressors are stopped and started for 10 minutes. (Upper limit of LEV opening is So = 388 pulse.) • SLEV = 0 when the No. 1 compressor is stopped.
5) Change in number of operating indoor units while defrosting • If the number of indoor units changes while the outdoor unit is defrosting, the defrosting operation continues. Once defrosting has ended, control for changing the number of units is performed. • If the indoor unit is stopped while the outdoor unit is defrosting or if the thermostat is set to off, the defrosting operation continues. Once defrosting has ended, the unit is stopped.
(9) Outdoor unit heat exchanger capacity control 1) Control method • In order to stabilize the evaporation temperature during cooling and the high-pressure pressure during heating that are required in response to performance needs, the capacity of the outdoor heat exchanger is controlled by regulating the fan volume of the outdoor unit by phase control and controlling the number of fans and by using the solenoid valves to vary the number of out door heat exchangers being used.
(11) Control at initial starting • When the ambient temperature is low (5°C or less in cooling and – 5°C or less in heating), initial starting will be performed if the unit is started within 4 hours of the power being turned on. • The following initial start mode will be performed when the unit is started for the first time after the power has been turned on. Start of initial operation mode Step 1 • Only the No.1 compressor is operated (f 75 Hz) • Operation of the No.
3 End of initial operation mode minutes 10 minutes 5 minutes 30 minutes (Example 1) ON/OFF of No.1 compressor Note 1 ON/OFF of No.2 compressor Step 1 (Example 2) 30 minutes Step 2 Step 3 3 3 End of initial operation mode minutes minutes 10 minutes 10 minutes 5 minutes Note 1 ON/OFF of No.1 compressor Note 2 ON/OFF of No.
(12) Emergency response operating mode The emergency operation mode is a mode in which the unit is run in an emergency to respond to the trouble when the compressors (No. 1, No. 2) break down, making it possible to carry out a abnormality reset using the remote control. 1) Starting the Emergency Operation Mode 1 Trouble occurs (Display the abnormality code root and abnormality code on the remote control). 2 Carry out trouble reset with the remote control.
[2] Control of BC Controller (1) Control of SVA, SVB and SVC SVA, SVB and SVC are turned on and off depending on connection mode. Mode Cooling Heating Stop Defrost ON OFF OFF OFF SVB OFF ON OFF OFF SVC ON OFF OFF OFF Connection SVA (2) Control of SVM1 (only FA type) SVM1 is turned on and off corresponding to operation mode.
[3] Operation Flow Chart (1) Outdoor unit Start NO Normal operations Trouble observed Stop Breaker turned on YES “HO” blinks on the remote controller Note : 1 NO Set indoor address No. to remote controller YES NO Operation command YES Oil return LEV, fully closed Fan 1. 2. 3. 4.
(2) BC controller Start NO Normal operations Trouble observed Stop Breaker turned on YES NO Operation command YES 1. Operation mode judgement (cooling-only, heating-only, cooling/heating mixed) 2. Transmission to outdoor unit Receiving operation mode command from outdoor unit Note : 1 Error mode YES NO Error stop Cooling/heating mixed Fan Operation mode Error code blinks on the outdoor controller board Operation mode Solenoid valve OFF, LEV fully closed.
(3) Indoor unit Start Breaker turned on Normal operations Trouble observed Stop NO YES Operation SW turned on YES NO Note :1 1. Protection function self-holding cancelled. 2. Indoor unit LEV fully closed.
(4) Cooling operation Cooling operation Normal operations Test run Stop 4-way valve OFF Indoor unit fan operations Test run start YES NO NO Thermostat ON YES YES 3-minute restart prevention NO 1. Inverter output 0Hz 2. Indoor unit LEV, oil return LEV 3. Solenoid valve OFF 4. Outdoor unit fan stop 5. BC controller solenoid valve OFF 6. BC controller LEV fully closed 1. Inverter frequency control 2. Indoor unit LEV, oil return LEV control 3. Solenoid valve control 4. Outdoor unit fan control 5.
(5) Heating operation Heating operation Note : 1 Note : 2 Defrosting operation Normal operations Defrosting operations Stop Test run YES NO 4-way valve OFF 4-way valve ON Test run start YES NO NO Thermostat ON YES YES 1. Indoor unit fan stop 2. Inverter defrost frequency control 3. Indoor unit LEV fully opened, oil return LEV fully closed 4. Solenoid valve control 5. Outdoor unit fan stop 6. BC controller solenoid valve control 7. BC controller LEV control 3-minute restart prevention NO 1.
(6) Dry operation Dry operations Normal operations Thermostat ON Stop 4-way valve OFF Test run start YES Note : 2 Thermostat ON NO NO Inlet temp. 18˚C YES Note : 1 1. Indoor unit fan stop 2. Inverter output 0Hz 3. Indoor unit LEV, oil return LEV closed 4. Solenoid valve OFF 5. Outdoor unit fan stop 6. BC controller solenoid valve OFF 7. BC controller LEV fully closed 1. Outdoor unit (Compressor) intermittent operations 2.
[4] List of Major Component Functions Code (Function) Electronic LEV expansion valve Name Product code Application 1 Adjustment of super heat of heat exchanger outlet port of indoor unit during cooling. 2 Adjustment of sub-cool of heat exchanger outlet port of indoor unit during heating. Specification Inspection method DC 12 V Amount of opening of the stepping motor drive valve 60 to 2000 pulse. (Gear Type) Perform a continuity check using a tester. Conductivity among white, red and orange.
Name Code (Function) Thermistor TH3 TH4 (Liquid level detection) Product code Application Specification Detects liquid level of refrigerant inside R0 = 15 kΩ accumulator using the differences B1/80 = 3460 Rt = among TH2, TH3, TH4. 15exp{3460( TH5 (Pipe temperature) 1 Frequency control. 2 Controls defrosting during heating. TH6 (Outdoor temperature) 1 Detects the outdoor air temperature. 2 Performs fan control, liquid level heater control, opening settings of LEV for oil return and other functions.
Name Outdoor unit Solenoid vallve Code (Function) Product code Application Specification SV3~8 heat exchanger capacity control Controls heat exchanger capacity of AC 220 to 240 V Close: conducting outdoor unit. Open : not conducting SV6a dischargesuction bypass Evaporation of liquid refrigerant inside AC 220 to 240 V MC2. Open : conducting Close: not conducting Inspection method Conductivity test using tester.
[5] Resistance of Temperature Sensor Thermistor for low temperature Thermistor Ro= 15kΩ ± 3% (TH3 ~ 9) 1 1 )} Rt = 15exp {3460 ( 273+t Thermistor R120 = 7.465kΩ ± 2% (TH1, 10) 1 1 Rt = 7.
6 REFRIGERANT AMOUNT ADJUSTMENT By clarifying the relationship between the refrigerant amount and operating characteristics for BgR2 Series, conduct service activities such as decision on the amount and adjustment of refrigerant on the market. [1] Operating Characteristics and Refrigerant Amount The followings are operating characteristics and refrigerant amount which draw special attention.
(2) Refrigerant Volume 1) Checking the Operating Condition Operate all the indoor units in cooling or in heating, checking the discharge temperature, sub-cooling, low pressure saturation temperature, inlet temperature, shell bottom temperature, fluid level, fluid step, etc. and rendering an overall judgment. Note: Depending on the operating state, AL = 0 does not mean that there is insufficient refrigerant. 1 2 3 4 5 6 Condition Discharge temperature is high.
[3] Refrigerant Volume Adjustment Mode Operation (1) Procedure Depending on the operating conditions, it may be necessary either to charge with supplementary refrigerant, or to drain out some, but if such a case arises, please follow the procedure given below. 1 Switching the function select switch (SW2-4), located on the outdoor unit’s control board, ON starts refrigerant volume adjustment mode operation and the following operation occurs. (Refrigerant recovery mode and oil recovery mode will be invalid.
(2) Refrigerant adjustment in Cooling season (Flow chart) In case of PURY-P400, 500YMF-C YES Adjustment starts. NO Start cooling operation of all indoor units in a test run mode. Note 1 Note 1) As the refrigerant volume can not be adjusted in the heating mode, retrieve the refrigerant, evacuate air and then fill the specified volume of refrigerant if it is necessary to adjust the refrigerant volume in the winter season.
(3) Refrigerant adjustment in heating season (Flow chart) In case of PURY-P400, 500YMF-C Start Adjustment YES NO Run all the indoor units in the heating condition in the test run mode. Note: 1 AL = 1 or 2 Note: 3 Is the accumulator's liquid level AL = 1? Note: 2 Has the operating condition stabilized? Note: 3 Is the accumulator's liquid level AL = 0? Charge with small amounts of refrigerant at a time through the low pressure service port.
Note: 1 If there are any units which are not operating, it will cause refrigerant to accumulate, so by all means operate all the indoor units. Also, in order to prevent stable operation from being disrupted by the thermostat going OFF, set the trial operation mode. Note: 2 If the high pressure is stabilized, it is safe to judge that the operation condition is stable. Judge that operation is stabilized or not stabilized by whether the compressor starts after 3 or more minutes have passed.
7 TROUBLESHOOTING [1] Principal Parts Pressure Sensor (1) Judging Failure 1) Check for failure by comparing the sensing pressure according to the high pressure/low pressure pressure sensor and the pressure gauge pressure. Turn on switches 1, 3, 5, 6 (High) and 2, 4, 5, 6 (Low) of the digital display select switch (SW1) as shown below, and the sensor pressure of the high pressure/low pressure sensors is displayed digitally by the light emitting diode LD1.
Solenoid Valve (SV1~8) Check if the control board’s output signals and the operation of the solenoid valves match. Setting the self-diagnosis switch (SW1) as shown in the figure below causes the ON signal of each relay to be output to the LED’s. Each LED shows whether the relays for the following parts are ON or OFF. When a LED lights up, it indicates that the relay is ON.
Solenoid Valves Block1 The refrigerant flow is as following figure. Hot gas (high pressured) flows in cooling mode and cool gas/liquid (low pressured) flows in heating mode. Please refer to the Refrigerant Circuit Diagram. And, ON/OFF of Solenoid valve is depends on the amount of running indoor units, ambient temperature and so on. So please check by LED Monitor Display. If the SV coil is taken off, then it is possible to open caps and check plungers.
Solenoid Valves Block2 2 4 1 3 1 Solenoid Valves Block 2 SV7 2 3 SV8 CV7b 4 CV5b CV4b CV6b CV2b CV3b ST1 BV1 BV2 –69–
Check Valves Block1 The refrigerant flow in the pipe 6, 7, 8 and 9 are depend on ON/OFF of the SV3, 4, 5 and 6. Please confirm by LED monitor display. You can open the cap of valve A, B and C, but 3 types of hexagon socket screw keys. The size is as follows. * Closed torque : A : 1.7kg·m (0.17N·m) B : 20kg·m (2.0N·m) C : 13kg·m (1.
Check Valves Block2 1 3 5 6 4 7 2 6 7 5 3 1 CV5b 4 CV4b CV6b CV2b CV3b 2 Check Valves Block2 ST1 BV1 BV2 –71–
Outdoor LEV The valve percentage opening changes in proportion to the number of pulses.
Judgment methods and likely failure mode Caution: The specifications of the outdoor unit (outdoor LEV) and indoor unit (indoor LEV) differ. For this reason, there are cases where the treatment contents differ, so follow the treatment specified for the appropriate LEV as indicated in the right column. Failure Mode Microcomputer driver circuit failure Judgment Method Treatment 1 Disconnect the control board connector and connect the check LED as shown in the figure below.
Outdoor LEV (SLEV) Coil Removal Procedure (configuration) As shown in the figure, the outdoor LEV is made in such a way that the coils and the body can be separated. Coils Body Stopper Indentation for Stopper (12 places around the circumference) Lead Wires Fasten the body tightly at the bottom (Part A in the figure) so that the body will not move, then pull out the coils toward the top.
Intelligent Power Module (IPM) Measure resistances between each terminal of IPM with tester, and use the results for troubleshooting. Specified resistance value is dependent on tester type to be used for resistance measurement, because diode inside IPM has non-linearity, thus difference of impedance and voltage in tester being influential.
(2) Trouble and remedy of remote controller (In the case of MA remote controller) 1 Phenomena Factors Check method and handling If pushing the remote control operation SW does not make a sound such as feep with the crystal display lamp out, and no operate is possible. 1) Power supply from transformers is not turned on in Indoor Unit. 1 The original power supply of Indoor Unit is not turned on. 2 The connector (CND. CNT, CN3T) on the controller board in the room has come off.
Phenomena 3 Factors When the remote control SW is turned on, the indication goes off after approximately 20- 30 seconds, and indoor unit stops. 1) Power supply from the transformer is not available to the control board of BC controller. 1 The original power supply of the BC controller is not turned on. 2 Removal of connectors (CN12, CN38, CNTR) on the control board of the BC controller. 3 Fuse on the control board of the BC controller is blown.
Phenomena 4 Factors “HO” indication on the remote controller is not lit, and the ON/OFF switch does not work. 1) The M-NET transmission power supply form the outdoor unit is not supplied. 1 The original power supply of Indoor Unit is not turned on. 2 The connector on the controller board in Indoor Unit is removed. Main board ----CNS1, CNVCC3 INV board----CNAC2, CNVCC1, CNL2 3 Power supply circuit defects of the outdoor unit.
(In the case of M-NET remote controller) Symptom 1 Despite pressing of remote controller ON/OFF switch, operation does not start and there is no electronic sound. (No powering signal appears.) 2 At about 10 seconds after turning remote controller operation switch ON, the display distinguishes and the operation stops. Cause Checking method & countermeasure 1) M-NET transmission power source is not supplied a) Check transmission terminal block of from outdoor unit. remote controller for voltage.
3 Symptom Cause “HO” display on remote controller does not disappear and ON/OFF switch is ineffective. (Without using MELANS) 1) Outdoor unit address is set to “00” 2) Erroneous address. 1 Address setting of indoor unit to be coupled with remote controller incorrect. (Indoor unit = remote controller - 100.) 2 Address setting of remote controller incorrect. (Remote controller = indoor unit + 100.) 3) Faulty wiring of transmission terminal block TB5 of indoor unit in the same group with remote controller.
Symptom 4 “88” appears on remote controller at registration and access remote controller Cause Checking method & countermeasure [Generates at registration and confirmation] 1) Erroneous address of unit to be coupled. 2) Disconnection of transmission line of unit to be coupled (No connection). 3) Faulty circuit board of unit to be coupled. 4) Installation miss of transmission line. a) Confirm the address of unit to be coupled. b) Check the connection of transmission line.
Transmission Power Circuit (30 V) Check Procedure If “ ” is not displayed by the remote control, investigate the points of the trouble by the following procedure and correct it. No. Check Item 1 Disconnect the transmission line from TB3 and check the TB3 voltage. 2 3 4 5 6 7 8 9 Judgment Response DC24~30 V Check the transmission line for the following, and correct any defects. Broken wire, short circuit, grounding, faulty contact. Except the above-mentioned Go to No.
(3) Investigation of transmission wave shape/noise Control is performed by exchanging signals between outdoor unit, indoor unit and remote controller by M-NET transmission. If noise should enter into the transmission line, the normal transmission will be hindered causing erroneous operation. 1) Symptom caused by the noise entered into transmission line Cause Erroneous operation Noise entered into transmission line 2) Error code Signal changes and is misjudged as the signal of other address.
3) Checking and measures to be taken (a) Measures against noise Check the items below when noise can be confirmed on wave shape or the error code in the item 1) is generated. Checking for wiring method Items to be checked Measures to be taken 1 Wiring of transmission and power lines in crossing. Isolate transmission line from power line (5cm or more). Never put them in the same conduit. 2 Wiring of transmission line with that of other system in bundle.
4) Treatment of Inverter and Compressor Troubles If the compressor does not work when error codes 4240, 4250, 4340 or 4350 are detected, determine the point of malfunction by following the steps in the LED monitor display and countermeasures depending on the check code displayed, then perform the procedures below. No. Check Item Symptoms Treatment How many hours was the power kept on before 1 operation? 1 If it was kept on for 12 hours or longer as specified. Go to [2].
5) Treatment of Fan Motor Related Troubles Condition Possible Cause Check Method and Treatment 1 The fan motor will not run 1) The power supply voltage is abnormal. for 20 minutes or longer when the AK value is 10%. (When the MAIN board’s SW1 is set as shown below, the AK value is displayed by the 2) Wiring is faulty. service LED.) SW1 = 1110001000 2 The fan motor’s vibration is great.
6) Troubleshooting at breaker tripping Check items Measures to be taken The breaker’s capacity should be correct to “System design” in data book. 1 Check the breaker capacity. 2 Check for a short circuit or grounding in the electrical system other than the inverter. Correct any defects. 3 Check the resistance between terminals on the terminal block TB1A for power source. Check each part inside the inverter power circuit (resistance, megohm or the like).
7) Individual Parts Failure Judgment Methods. Part Name Judgment Method Diode Stack (DS) Refer to “Judging Diode Stack Failure.” Intelligent Power Module(IPM) Refer to “Judging IPM Failure.” Electromagnetic Contactor (52C) Measure the resistance value at each terminal. A2 A1 1/L1 3/L2 5/L3 2/T1 4/T2 6/T3 Check Location Judgment Value A1-A2 0.1k~1.3kΩ 1/L1-2/T1 3/L2-4/T2 5/L3-6/T3 ∞ Rush Current Protection Resistor (R1, 5) Measure the resistance between terminals: 4.5k~5.
Motor (Compressor) Red White Black IPM U V W N Black P Red G/A board –89– Capacitor (C2,C3)
(4) Troubleshooting the major components of the BC controller 1) Pressure sensor Pressure sensor troubleshooting flow START Note 1 Check pressure sensor, PS1, PS3, connectors for disconnection, looseness, or incorrect attachment. No OK? Take corrective action. Yes No Unit running? Note 2 Yes Check on the LED monitor display. • TH2 or LPS of outdoor unit.
Note 1 : • Symptoms of incorrect i.e, reverse connection of PS1 and PS3 to BC controller board Cooling-only Normal Cooling-principal Insufficient cooling. Symptom Heating-only Heating-principal SC11 large Warm indoor SC11 small Insufficient heating SC11 large SC16 small SC small. When SC16 small Warm indoor SC small SC16 small PHM < 0 SV opens some PHM < 0 When SV opens some PHM < 0 noise produced. noise produced.
2) Temperature Sensor Thermistor troubleshooting flow Start Note 1 Disconnect applicable thermistor connector from the board. Note 2 Measure temperature of applicable thermistor (actual measured value). Note 3 Check thermistor resistance value. Compare temperature for thermistor resistance value with actual measured valued. No difference? No Note 5 Yes Note 4 Change thermistor. Insert applicable thermistor connector into board, and check sensor input temperature on LED monitor for difference.
Note 1 : • Board connector CN10 corresponds to TH11 through TH14, while connector CN11 corresponds to TH15 through TS15. Remove the applicable connector and check the sensor for each number. Note 2, 3 : 1. Pull the sensor connector from the I/O board. Do not pull on the lead wire. 2. Measure resistance using a tester or other instrument. 3. Compare measured values with values on the graph below. A value within a range of ±10% is normal.
3) LEV, Solenoid Valve Troubleshooting Flow No cooling No heating Note 1 Check disconnection or looseness of connectors. Yes Is there a problem? Correct the problem. Operate in cooling or heating (1 system only when there are plural systems) Heating operation Cooling or heating operation? Note 2 Note 2 Check if LEV 1 are fully open No No LEV 1 fully open? Yes Check if LEV 1 are fully shut. LEV 1 fully shut? Check LEV1 Check if LEV3 is controlled by superheat. LEV3 is not controlled.
1 LEV Note 1 : • Symptoms of incorrect connection to BC controller LEV board LEV No.
(Self-diagnostic monitor) Measured Data Signal OUTDOOR MAIN board SW1 Setting 1 2 3 4 5 6 7 8 9 10 LEV1 pulse – ON LEV 3 pulse – ON LEV 3a pulse – ON BC controller bypass output superheat SH12 ON BC controller intermediate subcool SC16 ON BC controller liquid subcool SC11 ON 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 (Solenoid Valve Troubleshooting Flow) Check for the following: LEV full open: ticking sound LEV full clos
2 Solenoid Valve Solenoid valve troubleshooting Operation OFF? Check solenoid valve wiring for incorrect connection, and connector disconnection or looseness. No problem. Yes Correct the problem. No Operate cooler and heater for the applicable solenoid valve’s refrigerant system only. Note 1 Clicking noise produced when working timing? No Remove the coil and check for a magnetic force. Yes No Magnetic force is OK? Stop the unit.
Solenoid valves (SVA, SVB, SVC, SVM1) Coordination signals output from the board and solenoid valve operations. *SVM is not built in depending on models. Note 1 : (SVA, SVB, SVC) SVA, SVB and SVC are turned on and off in accordance with operation mode. Mode Branch port Cooling Heating Stopped Defrosting ON OFF ON OFF ON OFF OFF OFF OFF OFF OFF OFF SVA SVB SVC (SVM1) SVM is turned on and off in accordance with operation mode.
[2] BC Controller Disassembly Procedure (1) Service panel Be careful on removing heavy parts. Procedure Illustrations 1. Remove the two screws securing the electric panel box. Loosen the two screws securing the electric panel box, and then remove the box. Loosen only Front panel Ceiling panel 2. Remove the four screws securing the front panel and then remove the panel. 3. Remove the nine screws securing the ceiling panel and then remove the panal.
(3) Thermistor (Liquid and gas piping temperature detection) Be careful when removing heavy parts. Procedure Photos 1. Remove the front panel 1 Use the procedure under (1)-1.2.3 to check TH11, TH12, TH15, and TH16. 2. Disconnect the piping sensor lead from the controller panel. 1 TH11 - TH12 (CN10) 2 TH15, TH16 (CN11) TH16 TH11 3. Pull the temperature sensor from the temperature sensor housing and replace it with a new sensor. 4. Connect the temperature sensor lead securely to the controller board.
(5) LEV Be careful on removing heavy parts. Procedure Photos 1. Remove the service panel. See (1)-1.2.3 LEV3 2. Replace the applicable LEV. Important! 1 When performing the above procedure, be sure to allow for enough service space in the ceiling area for welding. 2 When conditions require, the unit can be lowered from the ceiling before starting work. LEV1 (6) Solenoid Valve Coil Procedure Photos 1. Remove the service panel. See (1)-1.2.3 2. Disconnect the connector of the applicable solenoid valve.
Check Code List Check Code 0403 Check Content Serial transmission abnormality 0900 Trial operation 1102 Discharge temperature abnormality 1111 Low pressure saturation temperature sensor abnormality (TH2) 1112 Low pressure saturation Liquid level sensing temperature sensor abnormality (TH4) 1113 temperature abnormality Liquid level sensing temperature sensor abnormality (TH3) 1143 Lacked refrigerant abnormality 1301 Low pressure abnormality (OC) 1302 High pressure abnormality (OC) 1368 Li
Check Code Check Content 6606 Communications with transmission processor abnormality 6607 No ACK abnormality 6608 No response abnormality 6831 Abnormal MA communication receiving (No receiving) 6832 Abnormal MA communication receiving (Abnormal cycle recovery) 6833 Abnormal MA communication sending (H/W abnormality) 6834 Abnormal MA communication receiving (Start bit detection abnormality) 7100 Total capacity abnormality 7101 Capacity code abnormality 7102 Connected unit count over 710
[3] Self-diagnosis and Countermeasures Depending on the Check Code Displayed (1) Mechanical Checking code 0403 Serial transmission abnormality Meaning, detecting method Cause Checking method & Countermeasure If serial transmission cannot be 1) Wiring is defective. established between the MAIN and INV boards. Check 1, the connections, 2, contact at the connectors and 3, for broken wires in the following wiring.
Checking code Meaning, detecting method 1102 Discharge 1. When 140˚C or more discharge temperature temperature is detected during abnormality operations (the first time), out(Outdoor unit) door unit stops once, mode is changed to restart mode after 3 minutes, then the outdoor unit restarts. 2. When 140˚C or more temp. is detected again (the second time) within 30 minutes after stop of outdoor unit, emergency stop is observed with code No. “1102” displayed. 3. When 140˚C or more temp.
Checking code 1111 Meaning, detecting method Low 1. When saturation temperature pressure sensor (TH2) or liquid level desaturation tecting temperature sensors tempera(TH3, TH4) detects -40˚C or ture less (the first time) during opsensor erations, outdoor unit stops abnormalonce, mode is changed to reity (TH2) start mode after 3 minutes, then the outdoor unit restarts. 2. When -40˚C or less temp.
Checking code 1301 Low pressure abnoramlity Meaning, detecting method When starting from the stop mode for the first time, (if at the start of bind power transmission, the end of bind power transmission, and in the mode when the thermostat goes OFF immediately after the remote control goes ON, the following compressor start time is included), if the low pressure pressure sensor before starting is at 1.0 kg/cm2G (0.098MPa), operation stops immediately.
Checking code Meaning, detecting method 1302 High pressure abnoramlity 2 (Outdoor unit) When press. sensor detects 1kg/ cm2G (0.098MPa) or less just before starting of operation, erro stop is observed with code No. “1302” displayed. Liquid side 1368 Cause Checking method & Countermeasure 1) Fall in internal press. caused by See Trouble check of pressure sengas leak. sor. 2) Press. sensor trouble. 3) Film breakage. 4) Coming off of pin in connector portion, poor contact. 5) Broken wire. 6) Press.
Checking code 1500 Overcharged refrigerant abnormality Meaning, detecting method 1. When discharge superheart 10 deg is keeping for 10 minutes or discharge superheat 20 deg for 15 minutes, outdoor unit stops once, and after 3 minutes, the unit restarts. For 60 minutes after unit stopped is intermittent fault check period. Cause Checking method 1) Excessive refrigerant charge. Check refrigerant amount. 2) Thermistor trouble (TH1). Check resistance of thermistor. 3) Pressure sensor trouble (63HS).
Checking code 1505 Suction pressure abnormality Meaning, detecting method Cause Judging that the state when the • suction pressure reaches 0kg/ cm2G (0MPa) during compressor operation indicates high pressure by the discharge temperature and low pressure saturation tempera- • ture, the back-up control by gas bypassing will be conducted. • Operation while neglecting to open ball valve. Especially for the ball valve at low pressure side.
Checking code Meaning, detecting method Cause 4103 Reverse phase Reverse phase (or open phase) in 1) The phases of the power supply (L1, abnormality the power system is being deL2, L3) have been reversed. tected, so operation cannot be started. Checking method & Countermeasure If there is reverse phase before the breaker, after the breaker or at the power supply terminal blocks TB1A, reconnect the wiring.
Checking code 4116 Fan speed abnormality (motor abnoramlity) 4200 VDC sensor/circuit abnormality Meaning, detecting method (Detects only for PKFY-VAM) 1. Detecting fan speed below 180rpm or over 2000rpm during fan operation at indoor unit (first detection) enters into the 3-minute restart prevention mode to stop fan for 30 seconds. 2.
Checking code Meaning, detecting method Cause Checking method & Countermeasure 4220 Bus 1 If VDC 400 V is de- 1) The power supply voltage • voltage tected during inverter is abnormal. abnormality operation. • 2) The wiring is defective. Check if an instantaneous stop or power failure, etc. has occurred. Check if the voltage is the rated voltage value.
Checking code 4240 Over loard protection Meaning, detecting method Cause If IAC 32 Arms is detected con- 1) Air passage short cycle. tinuously for 10 minutes during operation of the inverter after 5 or 2) The heat exchanger is clogged. more seconds have passed since the inverter started. 3) Power supply voltage. Checking method & Countermeasure Is the unit’s exhaust short cycling? Clean the heat exchanger. If the power supply voltage is less than 342 V, it is outside specifications.
Checking code Meaning, detecting method 4260 Cooling fan abnormality If the heat sink temperature (THHS) 100°C for 20 minutes or longer just before the inverter starts. 5101 5102 5104 5105 5106 5107 Thermal sensor abnormality (Outdoor Unit) 5103 5109 Discharge (TH11, TH12) 1 A short in the thermistor or an open circuit was sensed.
Checking code 5201 Pressure sensor abnormality (outdoor unit) Meaning, detecting method Cause 1 When pressue sensor detects 1kg/cm2G (0.098MPa) or less during operation, outdoor unit once stops with 3 minutes restarting mode, and restarts if the detected pressure of pressure sensor exceeds 1kg/cm 2 G (0.098MPa) imediately before restarting. 1) Pressutre sensor trouble. Checking method & Countermeasure See Troubleshooting of pressure sensor. 2) Inner pressure drop due to a leakage. 3) Broken cover.
Checking code 5301 IAC sensor/ circuit abnormality Meaning, detecting method Cause 1 If IAC 3 Arms is detected just 6) The circuit board is defective. before the inverter starts, or If IAC 3 Arms is detected during inverter operation after 5 seconds has passed since the inverter started when the INV board’s SW1-1 is OFF. [Inverter error detail : 6] 2 If the current sensor (ACCT) miss-wiring is detected during inverter operation.
(2) Communication/system Checking code 6600 Meaning, detecting method Cause Checking method & Countermeasure 1) Two or more controllers of outdoor At the genration of 6600 error, release the error by unit, indoor unit, remote controller, remote controller (with stop key) and start again. BC controller, etc. have the same a) If the error occures again within 5 minutes. Transmission from units with the address. → Search for the unit which has the same address same address is detected.
Checking code 6602 Meaning, detecting method Cause Checking method & Countermeasure Transmission processor hardware Checking method and processing error YES Transmission line installed while turning power source on? Shut off the power source of outdoor/indoor units/BC controller and make it again. NO Check power source of indoor unit.
Checking code 6606 Meaning, detecting method Cause Checking method & Countermeasure Communications with transmis- 1) Data is not properly transmitted due Turn off power sources of indoor unit, BC controller sion processor error to casual errouneous operation of and outdoor unit. the generating controller. When power sources are turned off sepaCommunication trouble between 2) Faulty generating controller.
Checking code 6607 Meaning, detecting method No ACK error When no ACK signal is detected in 6 continuous times with 30 second interval by transmission side controller, the transmission side detects error. Note: System Generating Display of compounit address trouble sition Detecting method 1 Outdoor Remote No reply unit (OC) controller (ACK) at (RC) OC transmission to BC The address/attribute shown on remote controller indicates the controller not providing the answer (ACK).
Checking code Meaning, detecting method 6607 No ACK error (continued) When no ACK signal is detected in 6 continuous times with 30 second interval by transmission side controller, the transmission side detects error. Note: (2) Group operation system using plural refrigerants System Generating Display of compounit address trouble sition Detecting method The address/attribute shown on remote controller indicates the controller not providing the answer (ACK).
Checking code Meaning, detecting method 6607 No ACK error (continued) When no ACK signal is detected in 6 continuous times with 30 second interval by transmission side controller, the transmission side detects error. Note: System Generating Display of compounit address trouble sition Cause Checking method & countermeasure 1 Outdoor Remote No reply As same that for single refrigerant system.
Checking code Meaning, detecting method 6607 No ACK error (continued) When no ACK signal is detected in 6 continuous times with 30 second interval by transmission side controller, the transmission side detects error.
Checking code 6608 Meaning, detecting method No response error Though acknowledgement of receipt (ACK) is received after transmission, no response command is returned. Detected as error by transmission side when the same symptom is re-peated 10 times with an interval of 3 seconds. Note: The address/attribute shown on remote controller indicates the controller which has detected error. Cause Checking method & Countermeasure 1) At the collision of mutual transmis- a) Generation at test run.
Checking code Meaning, detecting method Cause Checking method & Countermeasure 7102 Connected unit count over 2) The Outdoor unit address is being d) Check for the model total (capacity code total) set to 51~100 under automatic adof indoor units connected. dress mode (Remote controller displays “HO”). 3) Disconnection of transmission wiring at Outdoor unit. 4) Short circuit of transmission line in case of 3) & 4), remote controller displays “HO”.
[4] LED Monitor Display (1) How to read LED for service monitor By setting of DIP SW1-1 ~ 1-8, the unit operating condition can be observed with the service LED on the control circuit board. (For the relation of each DIP SW to the content, see the table provided.) As shown in the figure below, the LED consist of 7 segments is put in 4 sets side by side for numerical and graphic display.
Remarks: E: Contents into EPROM M: IC monitor through communication E*: Store in service memory No SW 0 Display Item LD1 1234567890 0000000000 Relay output display 1, Light ON display LD2 LD3 COMP COMP1 52C2 operat- start ing Inspection display 1, OC error LD4 21S4a 21S4b LD5 Remarks LD6 SV1 LD7 SV 22/32 LD8 Regularly light ON 0000~9999 (Address and error code inverted) 1 ✩ 1000000000 Relay output display 2 SV4a SV6a CH2, 3 52F 2 0100000000 Inspection display (IC also included) 2 3 ✩
No SW Item 1234567890 Display LD1 LD2 21 1010100000 Outdoor error delay history High pressure error 1, 2 – 22 0110100000 Overcur- INV error rent cut off Refrigerant Composition Oil temperovercharge sensor error ature error 23 1110100000 TH11 error TH2 error 24 0001100000 25 1001100000 Error log 1 26 0101100000 Inverter error details 27 1101100000 Error log 2 28 0011100000 Inverter error details 29 1011100000 Error log 3 30 0111100000 Inverter error details 31 1111100000 Error log 4 32 000001
No SW Item 1234567890 Display LD1 LD2 LD3 LD4 Remarks LD5 59 1101110000 Low pressure sensor data ↑ 60 0011110000 THHS data ↑ LD6 LD7 LD8 61 1011110000 62 0111110000 α oc ↑ 63 1111110000 α oc* ↑ 64 0000001000 Accumulator level 0~9 ("AL=" also displayed) 65 1000001000 HzAK increase/de- ∆ Hz crease – ∆ Hz 0 ∆ Hz + ∆ AK – ∆ AK 0 ∆ AK + 66 0100001000 Difference from target Tc Low -3deg or less Low -3 ~-2 deg Low Stable range -2 ~ -1 deg High 1~2 deg High 2~3 deg High, 3deg or m
When error stop occurs, No.101 - 125 display the last data just before error stop which is stored in the service memory. No SW Item 1234567890 Display LD1 LD2 LD3 LD4 LD5 98 0100011000 Lower four figures 0000~9999 99 1100011000 COMP2 operating time, Upper four figures ↑ 100 0010011000 Lower four figures ↑ 101 1010011000 Relay output disCOMP 52C1 play 1, Light display operating 52C2 102 0110011000 Relay output display 2 SV4a 21S4a 21S4b SV1 SV6a CH2, 3 52F 103 1110011000 TH11 data -99.
No SW Item 1234567890 Display LD1 LD2 LD3 LD4 Remarks LD5 139 1101000100 IC12 suction temperature -99.9~999.9 140 0011000100 IC13 suction temperature ↑ 141 1011000100 IC14 suction temperature ↑ 142 0111000100 IC15 suction temperature ↑ 143 1111000100 IC16 suction temperature ↑ 144 0000100100 IC1 liquid piping temperature -99.9~999.
No SW Display Item 1234567890 LD1 LD2 LD3 LD4 LD5 184 0001110100 IC9SH -99.9~999.9 185 1001110100 IC10SH ↑ 186 0101110100 IC11SH ↑ 187 1101110100 IC12SH ↑ 188 0011110100 IC13SH ↑ 189 1011110100 IC14SH ↑ 190 0111110100 IC15SH ↑ 191 1111110100 IC16SH ↑ 192 0000001100 IC1SC -99.9~999.
No SW Item 1234567890 Display LD1 LD2 LD3 LD4 LD5 Remarks LD6 LD7 LD8 229 1010011100 IC6 operation mode 230 0110011100 IC7 operation mode 231 1110011100 IC8 operation mode 232 0001011100 IC9 operation mode 0000:Stop 233 1001011100 IC10 operation mode 0001:Fan 234 0101011100 IC11 operation mode 0002:Cooling 235 1101011100 IC12 operation mode 0003:Heating 236 0011011100 IC13 operation mode 0004:Dry 237 1011011100 IC14 operation mode 238 0111011100 IC15 operation mode 239 1111011100 IC16
No SW Item 1234567890 Display LD1 LD2 LD3 LD4 LD5 274 0100100010 275 1100100010 276 0010100010 277 1010100010 278 0110100010 279 1110100010 280 0001100010 281 1001100010 282 0101100010 283 1101100010 284 0011100010 285 1011100010 286 0111100010 287 1111100010 288 0000010010 289 1000010010 290 0100010010 291 1100010010 292 0010010010 293 1010010010 294 0110010010 295 1110010010 296 0001010010 297 1001010010 298 0101010010 299 1101010010 300 0011010010 BC (master) TH11 data -99.9~999.
No SW Item 1234567890 Display LD1 LD2 LD3 LD4 LD5 Remarks LD6 LD7 319 1111110010 320 0000001010 321 1000001010 322 0100001010 323 1100001010 324 0010001010 325 1010001010 326 0110001010 327 1110001010 328 0001001010 329 1001001010 330 0101001010 331 1101001010 332 0011001010 333 1011001010 334 0111001010 335 1111001010 336 0000101010 337 1000101010 IC17 address / capacity code 0000~9999 0000~9999 338 0100101010 IC18 address / capacity code ↑ ↑ 339 1100101010 IC19 address / capacity code ↑
No SW Item 1234567890 Display LD1 LD2 LD3 LD4 LD5 364 0011011010 365 1011011010 366 0111011010 367 1111011010 368 0000111010 369 1000111010 370 0100111010 371 1100111010 372 0010111010 373 1010111010 374 0110111010 375 1110111010 376 0001111010 377 1001111010 378 0101111010 379 1101111010 380 0011111010 381 1011111010 382 0111111010 383 1111111010 384 0000000110 IC17 suction temperature -99.9~999.
No SW Item 1234567890 Display LD1 LD2 LD3 LD4 LD5 409 1001100110 410 0101100110 411 1101100110 412 0011100110 413 1011100110 414 0111100110 415 1111100110 416 0000010110 IC17 gas piping temperature -99.9~999.
No SW Item 1234567890 Display LD1 LD2 LD3 LD4 LD5 454 0110001110 IC23SC -99.9~999.
No SW Item 1234567890 Display LD1 LD2 LD3 LD4 LD5 499 1100111110 IC20 filter 0000~9999 500 0010111110 IC21 filter ↑ 501 1010111110 IC22 filter ↑ 502 0110111110 IC23 filter ↑ 503 1110111110 IC24 filter ↑ 504 0001111110 505 1001111110 506 0101111110 507 1101111110 508 0011111110 509 1011111110 510 0111111110 511 1111111110 –140– Remarks LD6 LD7 LD8
8 PREPARATION, REPAIRS AND REFRIGERANT REFILLING WHEN REPAIRING LEAKS [1] Location of leaks: Extension piping or indoor units (when cooling) (Pump down operation) 1 Attach a pressure gage to the low-pressure servicing check joint (CJ2). 2 Stop all of the indoor units. When the compressor has stopped, shut off the liquid ball valve (BV2) for the outdoor unit. 3 Stop all of the indoor units. When the compressor has stopped, turn the SW3-6 switch on the main board for the outdoor unit to ON.
[2] Location of leaks: Outdoor unit (Cooling mode) 1 Test run all indoor units in cooling mode. 1. With SW3-1 on the MAIN board of the outdoor unit set to ON and SW3-2 OFF → ON to test run all indoor units. 2. Change the remote controller settings so that all indoor units run in cooling mode. 3. Check that all indoor units are running in cooling mode. 2 Check the Tc and SC16 data. (The LED monitor switch (SW1) on the MAIN board of the outdoor unit can be used to display this data on the LED.) 1.
[4] Location of leaks: Outdoor unit (when heating) 1 Remove any refrigerant from the entire system (outdoor unit, extension piping and indoor units). Reclaim the refrigerant; do not discharge it into the air. 2 Repair the leaks. 3 After the leaks are repaired, replace the dryer with a new one and extract all of the air from the entire system to create a vacuum. Then, refill with refrigerant until it reaches the calculated specification (outdoor unit + extension piping + indoor units).
9 CHECK THE COMPOSITION OF THE REFRIGERANT YES NO Start Test run all indoor units. Are all units operating stably? (Note 1) NO YES Is the refrigerant composition of αOC correct? (Note 2) NO YES Finished checking the composition. Check TH2, TH9, LPS and the CS circuit block and correct any malfunctions. (Note 3) Is the refrigerant composition of αOC correct? (Note 2) NO YES Finished checking the composition. Check that R407 is correctly charged.
Note 1 Wait until the units stabilize as described in the refrigerant amount adjustment procedure in “Chapter 6”. Note 2 After the units are operating stably, check that the refrigerant composition of αOC is within the following ranges, indicating that the composition check is finished. If the accumulator liquid level AL = 0 when cooling: αOC = 0.20 ~ 0.26 If the accumulator liquid level AL = 1 when cooling: αOC = 0.23 ~ 0.34 When heating: αOC = 0.25 ~ 0.
Service Handbook PURY-P400, P500YMF-C Service Handbook PURY-P400, P500YMF-C HEAD OFFICE MITSUBISHI DENKI BLDG. MARUNOUCHI TOKYO 100-0005 TELEX J24532 CABLE MELCO TOKYO Issued in Aug 2002 F1105-214(MDOC) Printed in Japan New publication effective Aug 2002 Specifications subject to change without notice.
