SRK-GZ 1.
SRK-GZ CONTENTS 1.1 GENERAL INFORMATION........................................................................ 3 1.1.1 Specific features ................................................................................. 3 1.1.2 How to read the model name ............................................................. 3 1.2 SELECTION DATA .................................................................................... 4 1.2.1 Specifications .........................................................
SRK-GZ 1.1 GENERAL INFORMATION 1.1.1 Specific features The “Mitsubishi Daiya” room air-conditioner: SRK series are of split and wall mounted type and the unit consists of indoor unit and outdoor unit with refrigerant precharged in factory. The indoor unit is composed of room air cooling or heating equipment with operation control switch and the outdoor unit is composed of condensing unit with compressor.
SRK-GZ 1.2 SELECTION DATA 1.2.
SRK-GZ Model SRK35GZ-L1 (Indoor unit) SRC35GZ-L1 (Outdoor unit) Model SRK35GZ-L1 Item Refrigerant piping Operation data(1) Cooling capacity(1) Heating capacity(1) Power source Cooling input Running current (Cooling) Heating input Running current (Heating) Inrush current COP (Cooling) Noise level Exterior dimensions Height × Width × Depth Color Net weight Refrigerant equipment Compressor type & Q’ty Motor Starting method Heat exchanger Refrigerant control Refrigerant(4) Refrigerant oil Deice control Air
SRK-GZ Model SRK502Z-L (Indoor unit) SRC502Z-L (Outdoor unit) Model SRK502Z-L Item Refrigerant piping Operation data(1) Cooling capacity(1) Heating capacity(1) Power source Cooling input Running current (Cooling) Heating input Running current (Heating) Inrush current COP (Cooling) Noise level Exterior dimensions Height × Width × Depth Color Net weight Refrigerant equipment Compressor type & Q’ty Motor Starting method Heat exchanger Refrigerant control Refrigerant(4) Refrigerant oil Deice control Air ha
SRK-GZ 1.2.2 Range of usage & limitations (1) Inlet air temperature (a) (b) Heating operation Cooling operation JIS-Cooling Indoor air temp. ºC D.B. Outdoor air temp. ºC D.B. Applicable temp. range Applicable temp. range JIS-Heating Indoor air temp. ºC W.B. Note: The chart is the result from the continuous operation under constant air temperature conditions, however, excludes the initial pull-down stage. Outdoor air temp. ºC W.B.
SRK-GZ 1.2.3 Exterior dimensions (1) Indoor unit Model SRK25GZ-L1 Unit: mm A 178 Room temp. thermistor 750 3 9 250 56 Piping hole right (left) 49 615 75 450 150 236.5 19 15 9 46 150 Terminal block 117 75 16 60 746.9 40 4.5 92 36 36 Remote controller 7.5 62 62 7.5 Piping for Gas (Ø9.52) 370 40 Piping hole (Ø65) 37 Piping for Liquid (Ø6.35) 420 Piping hole (Ø65) VIEW A Model SRK35GZ-L1 Unit: mm A 790 174 3 Room temp.
SRK-GZ Model Unit: mm SRK502Z-L Remote controller (2) Outdoor unit Model SRC25GZ-L1 50 Unit: mm 13.5 12 44 274.5 245 42 Drain holes 300 192.5 23 12 372.5 82.5 480 645 82.5 2-Ø12 61.5 Terminal block 33.3 Service valve (Liquid) Flare connecting Ø6.35 (1/4˝) 39.7 540 127.7 100.3 14.4 40˚ 40˚ Service valve (Gas) Flare connecting Ø9.
SRK-GZ Model SRC35GZ-L1 50 55 Unit : mm MAX.80 23 14 44 65 93 255 272 58 22 14 Drain holes 265 795 542 539 32 40 413 Terminal block 115 45° 45° 16 12 (Oval holes) for unit fixing 65 2 places 15 44 50 58 14 Model 272 300 14 Drain holes 142.5 510 142.5 33 Service Valve (Liquid) Flare connecting Ø6.35 (1/4¨) Service Valve (Gas) Flare connecting Ø12.
SRK-GZ 1.2.4 Piping system Model SRK25GZ-L1 Indoor unit Outdoor unit Cooling cycle Heating cycle Flare connecting Piping (Gas) ø9.52 Service valve (Gas) Outdoor air temp. thermistor Check joint 4 way valve Accumulator Room temp. thermistor Discharge temp. thermistor Heat exchanger thermistor Heat exchanger Heat exchanger Compressor Piping (Liquid) ø6.
SRK-GZ Model SRK502Z-L 1.3 ELECTRICAL DATA 1.3.1 Electrical wiring Meaning of marks Symbol CFI Parts name Capacitor for FMI Symbol RE Parts name Reactor Symbol Tr Parts name Transformer CM Compressor motor SM Flap motor ZNR Varistor F1,2 Fuse Th1 Room temp.
White Violet Yellow/Green WH V Y/GN Yellow Y Red Light blue LB Gray Brown BR RD Blue BL GY Black BK Color symbol SM Y WH RD BK BR FMI WH LB CNM CNU CNW Y/GN Y/GN Power source 1 phase 220/240V 50Hz CFI Display Wireless R-Amp CNE CNC Tr CNB F1 (250V 3.
White Violet Yellow/Green WH V Y/GN Yellow Y Red Light blue LB Gray Brown BR RD Blue BL GY Black BK Color symbol SM Y WH RD BK BR FMI WH LB CNM CNU CNW Y/GN Y/GN Power source 1 phase 220/240V 50Hz CFI Display CNE CNC Tr Wireless R-Amp CND CNB F1 (250V3.
Light blue White Yellow/Green Y/GN Red RD LB Yellow Y WH Blue Brown BL Black BR BK Colorsymbol SM FMI BL Y WH BK RD CNE ( Display ) CNH 52C J Th3 CNF Th2 Th1 CNG Printed circuit board ZNR S Back up switch 52C-3 F 250V 3.
SRK-GZ 1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER (1) Remote control switch Remote control switch Models All models HI POWER operation indicator Indicators during HI POWER operation. FAN SPEED indicator ECONOMY operation indicator Indicators the ¡ for the fan speed which has been set. Indicators during ECONOMY operation. Operation switch over indicator Indicators the ¡ for the operation which has been set. ON-TIMER • OFF-TIMER indicator AIR FLOW indicator Indicates selected flap mode.
SRK-GZ Model SRK35GZ-L1 RUN (HOT KEEP) lamp (green) TIMER • Illuminates during operation. • Flashing at stop blowing due to the hot keep. RUN TIMER lamp (yellow) Illuminates during TIMER operation. SRK35GZ Model SRK502Z-L RUN (HOT KEEP) lamp (green) TIMER lamp (yellow) Illuminates during TIMER operation. • Illuminates during operation. • Flashing at stop blowing due to the hot keep. RUN HI POWER TIMER ECONO HI POWER lamp (green) ECONOMY lamp (orange) Illuminates during HI POWER operation.
SRK-GZ (3) Flap control Control the flap by AIRFLOW button on the wireless remote control. (a) Natural flow (AUTO) The flap will be automatically set to the angle of air flow best to operation. (i) Starting time of operation Models SRK25GZ-L1, 35GZ-L1 In case of heating s operation t In case of cooling s and dry operation t Sway operation Stops at the level position for one minute. Sway operation Flap stops 3’50” on this position.
SRK-GZ (4) Comfort timer setting If the timer is set at ON when the operation select switch is set at the cooling or heating, or the cooling or heating in auto mode operation is selected, the comfort timer starts and determines the starting time of next operation based on the initial value of 15 minutes and the relationship between the room temperature at the setting time (temperature of room temperature sensor) and the setting temperature. (Max.
SRK-GZ (iii) Continuous mode operation (Temperature setting button on remote controller: Continuous) Model Item SRK25GZ-L1 AUTO Inverter frequency HI 104Hz Indoor fan 6th speed SRK35GZ-L1 MED LO AUTO 98Hz 50Hz 98Hz 5th speed 4th speed Outdoor fan HI 7th speed ON SRK502Z-L MED LO AUTO 94Hz 58Hz HI 144rps 5th speed 3rd speed ON MED LO 110rps 50rps 8th speed 7th speed 5th speed 5th speed 4th speed 2nd speed Notes (1) In the continuous mode, the continuous heating operation i
SRK-GZ (v) Defrosting operation S Models SRK25GZ-L1, 35GZ-L1 1) Starting conditions (Defrosting operation can be started only when all of the following conditions are met.) ¡ Model SRK25GZ-L1 1 After start of heating operation → When it elapsed 40 minutes. (Accumulated operation time) 2 After end of defrosting operation → When it elapsed 40 minutes.
SRK-GZ S Model SRK502Z-L 1) Starting conditions (Defrosting operation can be started only when all of the following conditions are met.) 1 After start of heating operation → When it elapsed 60 minutes. (Accumulated operation time) 2 After end of defrosting operation → When it elapsed 60 minutes. (Accumulated compressor operation time) 3 Outdoor unit heat exchanger thermistor (Th5) temperature → When the temperature has been below –2ºC for 3 minutes continuously.
SRK-GZ (6) Outline of cooling operation (a) Air capacity selection (i) Frequency of inverter changes within the range of selected air flow. Model SRK25GZ-L1 Air flow selection AUTO Frequency Air flow Frequency Air flow LO 34~102Hz 18~118rps Depends on frequency.
SRK-GZ (b) Outline of control (i) Cooling oriented dehumidifying S SRK25, 35GZ-L1 Room temperature is checked at 3-minute intervals after selecting the cooling or heating oriented dehumidifying in order to determine the operation range. Operation range D C Low B –1 A 0 +2 Hight Room temperature – Setting temperature (deg) Operating pattern D range C range B range A range 25 : 48 35 : 50 36 Inverter frequency 34 0 4th speed 2nd speed Indoor fan 1st speed OFF 20 sec.
SRK-GZ (ii) Heating oriented dehumidifying After interrupting the compressor operation for 3 minutes (by the 3-minute timer) following the determination of heating oriented dehumidifying, the unit enters in the heating operation. If the room temperature exceeds the setting temperature by 2ºC or more, the unit checks the room temperature at 3-minute intervals and, depending on the result, determines the range of heating oriented dehumidifying operation.
SRK-GZ (9) Economical operation (ECONO button on remote controller: ON) Pressing the economy button initiates a soft operation with the power suppressed in order to avoid an excessive cooling or heating. The unit operates 1.5ºC higher than the setting temperature for the LO air flow during cooling or 2.5ºC lower than that during heating.
SRK-GZ (g) Cooling overload protective control (i) Operating conditions: When the unit is operating with the outdoor unit frequency other than 0 Hz(rps) or when the outdoor temperature sensor temperature rose beyond 41ºC for 2 minutes continuously. (ii) Detail of operation S SRK25GZ-L1 1) Indoor fan speed is raised forcibly by 1 step. However, the maximum speed is the 3rd speed.
SRK-GZ (k) High pressure control (i) Purpose: Prevents abnormally high pressure operation during heating. (ii) Detector: Indoor unit heat exchanger thermistor (Th2) (iii) Detail of operation: (Example) Fuzzy 8 Hz (8 rps) (1), After lapse of 6 min. or over (3) After lapse of 6 min. or over (3) After lapse of 6 min. or over (3) (4) 8 Hz (8 rps) Lower limit frequency 34 Hz 0 Hz (30 rps) 55 Indoor unit heat exchanger temperature (˚C) 47.5 (49.
SRK-GZ S SRK502Z-L When stopped by indoor unit controller Function Operation Inverter frequency (Command frequency) 0 Indoor fan (Frequency dependent) OFF Indoor power relay ON Outdoor fan 4-way valve Heating, heating oriented dehumidifying Cooling, cooling oriented dehumidifying 3 min.(1) 3 min.(1) When stopped or reset by outdoor unit protective function Heating, heating oriented dehumidifying 2 min. 55 sec. Cooling, cooling oriented dehumidifying 2 min. 55 sec.
SRK-GZ 1.5 APPLICATION DATA SAFETY PRECAUTIONS ¡ Please read these “Safety Precautions” first then accurately execute the installation work. ¡ Though the precautionary points indicated herein are divided under two headings, WARNING and CAUTION , those points which are related to the strong possibility of an installation done in error resulting in death or serious injury are listed in the WARNING section.
SRK-GZ 1.5.1 Selection of location for installation (1) Indoor unit (a) Where there is no obstructions to the air flow and where the cooled air can be evenly distributed. (b) A solid place where the unit or the wall will not vibrate. (c) A place where there will be enough space for servicing. (Where space 4 cm mentioned below can be secured) Right side Left side 10 cm 5 cm (d) Where wiring and the piping work will be easy to conduct.
SRK-GZ 1.5.2 Installation of indoor unit (1) Installation of installation board (a) Fixing of installation board Lock for the inside wall structures (Intermediate support or pillar) and fairly install the unit after level surface has been checked. Adjustment of the installation board in the horizontal direction is to be conducted with four screws in a temporary tightened state. Tapping Screws Standard hole Adjust so that board will be level by turning the board with the standard hole as the center.
SRK-GZ (3) Preparation of indoor unit (a) Mounting of connecting wires S SRK25, 35GZ-L1 (i) Remove lid (ii) Remove cover, terminal block cover Earth Wiring Terminal Terminal Block Wiring Clamp Connecting Wiring (iii) Insert connecting wire to terminal block securely. 1 Insert connecting wire up to the terminal block securely.
SRK-GZ ¡ When arranging the pipe through a hole opened at the center, open the knockout hole using nippers, etc. Chute Wall Note (1) It is designed to collect moisture accumulated on the rear face in the drain pan. Be sure not to accommodate the power cable, etc. above the chute. Pipe accommodation space (4) Installation on indoor unit (a) Install the indoor unit on the mounting plate.
SRK-GZ 1.5.4 Refrigerant piping (1) Preparation Keep the openings of the pipes covered with tapes etc. to prevent dust, sand, etc. from entering them. Outdoor unit side Indoor unit side Dimension A Liquid side (φ6.35): 9-9.5 dia Gas side (φ9.52): 13.2-14 dia (φ12.7): 16.2-17 dia Press (Do not turn) Remove Remove ¡ Remove the flared nuts. (on both liquid and gas sides) ¡ Remove the flared nuts.
SRK-GZ (4) Insulation of connecting portion (a) Cover the connecting portion of the refrigerant piping with the pipe cover and seal them. If neglecting to do so, moisture occurs on the piping and water will drip out. To cover the connecting portion with insulation material materials, cut upper portion and then seal it with insulation materials.
SRK-GZ 1.5.6 Precautions for wireless remote controller installation and operation (1) Wireless remote controller covers the following distances: (a) When operating facing the air conditioner: 6 m or le ss or Wireless remote controller 6 m or less or les s or less Notes (1) The remote controller is correctly facing the sensing element of the air conditioner when being manipulated. (2) The typical coverage is indicated (in the left illustration).
SRK-GZ 1.6 MAINTENANCE DATA 1.6.1 Trouble shooting (1) Trouble shooting to be performed prior to exchanging PCB, (Printed circuit board) [Common to all models] All the models described in this chapter are controlled by a microcomputer. When providing maintenance service to customers it is necessary to understand the function controlled by a micro computer thoroughly, so as not to mistakenly identify correct operations as mis-operations.
RUN lamp 2 time flash RUN lamp ON (1) RUN lamp keeps flashing TIMER lamp ON 3 time flash 3 time flash Note (1) SRK502Z-L only 2 time flash 2 time flash 6 time flash 2 time flash 2 time flash 6 time flash 1 time flash 1 time flash 5 time flash OFF 4 time flash 5 time flash OFF 2 time flash 1 time flash OFF OFF 6 time flash TIMER lamp OFF OFF 1 time flash 2 time flash Outdoor unit LED RUN lamp Rotor lock Serial signal transmission error Compressor overheat Current safe stop
SRK-GZ (3) Inspection procedures corresponding to detail of trouble [Broken thermistor wire, connector poor connection] Thermistor error Is connector connection good? NO Correct connection. YES NO Is thermistor resistance value good? Replace thermistor. YES Replace PCB. Temperature (˚C) Resistance (kΩ) Temperature (˚C) Resistance (kΩ) 0 164 70 8.7 5 127 75 7.3 10 99 80 6.2 15 78 85 5.3 20 62 90 4.5 25 50 95 3.9 30 40 100 3.3 35 32 105 2.9 40 26 110 2.
SRK-GZ [Broken power transistor broken compressor wire] Outdoor unit error NO Is output voltage applied to all 3 phases of power transistor? Defective inverter YES NO Is compressor wiring connected securely? Connect securely. YES Inspect compressor. [Overload operation, compressor lock, overcharge] Current safe stop NO Is refrigerant charge quantity adequate? Discharge refrigerant. YES Is outdoor ventilation condition good? NO Secure space for suction and blow out. YES Inspect compressor.
SRK-GZ [Wiring error including power cable, defective indoor/ outdoor unit PCB, error on power supply system] Serial signal transmission error Does error persist after power reset? NO Trouble by transient cause, not unit trouble. YES Is there any wrong connection on indoor/outdoor unit wiring? NO Correct improper wire connection on indoor/ outdoor unit. YES Is DC 0~Approx. 12V detected between 2~3 terminals on indoor unit terminal block? NO Defective indoor unit PCB YES Is DC 0~Approx.
SRK-GZ (4) Phenomenon observed after shortcircuit, wire breakage on thermistor. (a) Indoor unit Phenomenon Sensor Operation mode Room temperature thermistor Cooling Release of continuous compressor operation command Continuous compressor operation command is not released. Heating Continuous compressor operation command is not released. Release of continuous compressor operation command Heat exchanger thermistor Cooling System can be operated normally.
SRK-GZ (6) Inspection procedures of indoor electrical equipment NO Is fuse (3.15A) blown? Replace fuse. YES Is voltage applied between CNC 1~2 at transformer’s secondary side? (Approx. 12V) NO Notes (1) Since the communication timing signal is transmitted only when the 52C is turned ON, check it under the operating condition. (2) Check the voltage on the terminal block. ¡ Power supply: Between 1~2 (AC 220/240V) ¡ Signal: Between 2~3 (Changing between DC 0~Approx.
RD WH NK F(15A) ◆ Inspection of serial signal Check the voltage between terminals 2~3on the terminal block.(It is normal if the needle swing in the range of DC 0~Approx.12V) ◆ Inspection of input to PCB ¡ Check the voltage between terminals 1~2 on the terminal block. (It is normal if AC220/240V is detected.
RD WH NK F(20A) ◆ Inspection of serial signal Check the voltage between terminals 2~3on the terminal block.(It is normal if the needle swing in the range of DC 0~Approx.12V) ◆ Inspection of input to PCB ¡ Check the voltage between terminals 1~2 on the terminal block. (It is normal if AC220/240V is detected.
Power source 1 Phase 220/240V 50Hz ● Power source and serial signal inspection 1 to 2: AC220/240V 2 to 3: Normal if the voltage oscillates between DC 0 and approx. 12V 3 2 1 CNB } CNE EEV 20S CNB AC.S GY CNA Printed circuit board Fuse 250V 25A S.OUT 52X2-4 AC.R BL ~ ~ DS – + WH Re ● Inspection of electronic expansion valve To test if there is voltage. (Voltage is only applied to the electronic expansion valve when the valve angle is being changed.
SRK-GZ 1.6.2 Servicing (1) Evacuation The evacuation is an procedure to purge impurities......noncondensable gas, air, moisture from the refrigerant equipment by using a vacuum pump. Since the refrigerant R22 is very insoluble in water, even a small amount of moisture left in the refrigerant equipment will freeze, causing what is called water clogging. ¡ Evacuation procedure (a) Check to ensure that there is no internal pressure in the unit.
SRK-GZ 1.6.3 Power supply remote operation When the remote part on indoor unit PCB is modified, the air conditioner is turned ON-OFF by power supply ON-OFF operation without using remote control switch. After the power supply remote operation, the operation contents can be modified by the remote controller.
SRK-GZ MEMO 50
SRK-H 2.
SRK-H CONTENTS 2.1 GENERAL INFORMATION ........................................................................ 53 2.1.1 Specific features ................................................................................. 53 2.1.2 How to read the model name ............................................................. 53 2.2 SELECTION DATA..................................................................................... 54 2.2.1 Specifications .....................................................
SRK-H 2.1 GENERAL INFORMATION 2.1.1 Specific features The “Mitsubishi Daiya” room air conditioner: SRK series are of split and wall mounted type and the unit consists of indoor unit and outdoor unit with refrigerant precharged in factory. The indoor unit is composed of room air cooling or heating equipment with operation control switch and the outdoor unit is composed of condensing unit with compressor.
SRK-H 2.2 SELECTION DATA 2.2.1 Specifications Model SRK328HENF-L2 (Indoor unit) SRC328HENF-L2 (Outdoor unit) Model SRK328HENF–L2 Item (1) Cooling capacity Heating capacity(1) W W 3000/3000 3800/3800 Cooling input kW 1 Phase, 220/240V, 50Hz 1.39/1.49 Running current (Cooling) Heating input A kW 6.9/6.9 1.19/1.32 Running current (Heating) Inrush current A A 6.1/6.1 33.6/36.
SRK-H Model SRK408HENF-L2 (Indoor unit) SRC408HENF-L2 (Outdoor unit) Model SRK408HENF-L2 Item SRC408HENF-L2 (1) W 3500/3500 Heating capacity(1) Power source W 4100/4100 1 Phase, 220/240V, 50Hz Cooling input Running current (Cooling) kW A 1.320/1.405 6.4/6.4 Heating input Running current (Heating) kW A 1.335/1.460 6.5/6.5 A 33.6/36.6 2.65/2.
SRK-H Model SRK501HENF-L (Indoor unit) SRC501HENF-L (Outdoor unit) Model SRK501HENF–L Item Cooling capacity(1) Heating capacity(1) W W 4500/4500 5700/5800 Cooling input kW 1 Phase, 220/240V, 50Hz 1.78/1.88 Running current (Cooling) Heating input A kW 8.4/8.2 1.76/1.89 Running current (Heating) Inrush current A A 8.5/8.
SRK-H Model SRK561HENF-L (Indoor unit) SRC561HENF-L (Outdoor unit) Model SRK561HENF–L Item Cooling capacity(1) Heating capacity(1) W W 5000/5000 6200/6300 Cooling input kW 1 Phase, 220/240V, 50Hz 2.08/2.18 Running current (Cooling) Heating input A kW 10.2/9.53 2.02/2.15 Running current (Heating) Inrush current A A 10.5/9.
SRK-H 2.2.2 Range of usage & limitations (1) Inlet air temperature (a) Cooling operation (b) Heating operating Applicable temp. range JIS-Cooling Indoor air temp. ºC D. B. Outdoor air temp. ºC D. B. Applicable temp. range JIS-Heating Indoor air temp. ºC W. B. Note: The chart is the result from the continuous operation under constant air temperature conditions, however, excludes the initial pull-down stage. Outdoor air temp. ºC W. B.
SRK-H 2.2.3 Exterior dimensions (1) Indoor unit Models SRK328HENF-L2, 408HENF-L2 A Unit: mm 790 174 3 Room temp. sensor 56 275 Piping hole right (left) 9 Terminal block 760 450 170 187.5 260 61 117 46 170 49 9 15 15 16 36 6 60 51 780 62 18 Piping for Gas (Ø12.7) 390 67 37 Piping for Liquid (Ø6.
SRK-H (2) Outdoor unit Models SRC328HENF-L2, 408HENF-L2 Unit: mm 55 Drain holes 44 65 93 255 272 58 MAX 80 22 14 50 23 14 265 795 32 40 16 x12 (Oval holes) for unit fixing 2 places 115 413 542 539 Terminal block 45˚ 50 45˚ 15 44 272 14 Drain holes 510 142.5 50 58 142.5 33 14 Service valve (Liquid) Flare fitting Ø6.35 (1/4˝) Service valve (Gas) Flare fitting Ø12.
SRK-H 2.2.4 Piping system Model SRK328HENF-L2 Cooling cycle Heating cycle Outdoor unit Indoor unit Service valve (Gas) High pressure switch (63H) (for fan motor control) Flare connecting Piping (Gas) Ø12.7 Heat exchanger Room temperature sensor Heat exchanger sensor Check joint Discharge Compressor Accumulator Heat exchanger 4way valve Suction Piping (Liquid) Ø6.
SRK-H Models SRK501HENF-L, 561HENF-L Indoor unit Cooling cycle Heating cycle Outdoor unit Service valve (Gas) Flare connecting Piping (Gas) Ø12.7 High pressure switch(63H) (for fan motor control) Check joint 4way valve Room temperature thermistor Heat exchanger thermistor Heat exchanger Discharge Accumulator Muffler Deicer thermostat Compressor Heat exchanger Suction Capillary tube Piping (Liquid) Ø6.
SRK-H 2.3 ELECTRICAL DATA 2.3.1 Electrical wiring Models SRK328HENF-L2, 408HENF-L2 Indoor unit Outdoor unit Y/GN Power source 1 Phase 220/240V 50Hz 4 4 BK BK WH BL BK RD BK 63H OR WH 52C BK WH Display 8 3 23DH 2 51C BK RD 7 BK 52X5 CFo Wireless R-Amp WH CNE CND Printed circuit board 20S RD OR S 7 52X6 RD BK FMo ZNR BK 2 2 52X6 6 BL BK BK Th2 CFI CNM LM 52X4 Th1 CNG CNU 1 5 3 CNW FMI BR WH RD PC F 250V 3.
SRK-H Models SRK501HENF-L, 561HENF-L Indoor unit RD 63H RD 23D 52C 52XA WH 2 23 DH BK OR 20S 51C CM 52XA BK OR CF0 52XB Cc BL RD OR OR Display WH CNH FM0 Wireless R-Amp BL RD ) CNM BK 52XB 6 ZNR LM TH2 RD ( 52X1 52X1 BK F 250V 3.
SRK-H 2.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 2.4.1 Table for operation control Refering page Functions High efficiency, low input rotary compressor Wireless remote control Dry ON TIMER 3 Hot system [Heat Pump type only] (in heating operation) Automatic fan control Micro computer control Comfortability, Economical efficiency, Operational simplicity OFF TIMER HOT START HOT SPURT HOT KEEP Micro computer (MC) controlled timely defrosting operation (in heating) M. C.
SRK-H 2.4.2 Details of operation control (1) Flap control Control the flap by the flap button on the wireless remote control (a) AUTO (Natural flow) The flap will be automatically set to the angle of air flow best to operation mode 1) Starting time of operation In case of cooling and s dry operation In case of heating t s operation t Air flow when flaps are used downward in heating Stops at the level position for one minute.
SRK-H (2) Back-up Switch When the remote controller batteries become weak, or if the remote controller is lost or malfunctioning, this switch may be used to turn the unit on and off. (a) Operation Push the switch once to place the unit in the automatic mode. Push it once more to turn the unit off.
SRK-H (4) Operation control function by remote control switch ¡ 32, 40 models Remote control switch OPERATION MOOD select button S Operation section Each time the button is pushed, the • indicator is switched over in turn. CONT AUTO HI MED LO FAN SPEED button Each time the button is pushed, the • indicator is switched over in turn. ON/OFF button Press for starting operation, press again for stopping. ON OFF TIMER FAN / SPEED ON / OFF AIRFLOW button MODE This button changes the flap mode.
SRK-H ¡ 50, 56 models The diagram below shows the heat pump type. The cooling only type does not have the items relating to heating. Remote control switch Air flow indicator HI POWER operation indicator Indicaters the selected air flow rate. Indicators during HI POWER operation. ECONOMY operation indicator Indicators during ECONOMY operation. AIR FLOW indicator Temperature indicator Indicates selected flap mode. AOUTHIMDLO Indicates the set temperature.
SRK-H (a) Comfort timer settings Temperature is checked beginning 1 hour before the set time, and the power is turned on before the timer setting as necessary to bring the temperature to the proper level by the set time. Operation mode Under 5˚C Operating start time (amount of time previous to set time that operation begins) 60 mins. Under 10˚C 30 mins. Under 15˚C 15 mins. Room temperature sensor (Th1) Heating Cooling Over 15˚C 5 mins. Over 40˚C 60 mins. Over 35˚C 30 mins.
SRK-H (e) Fan control 1) Fan speed change Mode COOL Fan speed knob HEAT AUTO See below LOW Speed 1 (Speed 1) Speed 2 (Speed 2) Speed 1 (Speed 1) MED Speed 2 (Speed 2) Speed 3 (Speed 3) Speed 2 (Speed 2) HIGH Speed 3 (Speed 4) Speed 4 (Speed 5) Speed 3 (Speed 3) Notes (1) (2) 2) FAN Please refer to page 73 regarding dry operation. Fan speeds shown in brackets are shown for when continuing with set temperatures.
SRK-H 2) Function a) The indoor fan motor is controlled in accordance with the temperature of the indoor heat exchanger to send warm air from the start. b) When the air flow increases at heating starting as shown below, the temperature of the indoor heat exchanger become lower since the intake air temperature is still low. By this the fan speed is decreased.
SRK-H (6) DRY operation (a) Choose the appropriate operation block area by the difference between room temperature and thermostat setting temperature as shown below. ¡Operation block area D Block C Block B Block A Block –2 0 +3 Room temp. – Setting temp.(deg) (b) Start up operation C.D Block A.
SRK-H (7) Dew condensation prevention control for cooling operation This prevents dew condensation, in the indoor unit, from occurring. (a) Operating condition: when 52C is kept ON for 30 min. after the unit starts operation. (b) Operation content: forces the indoor fan to change from Speed 1 to Speed 2. (c) Resetting condition: When 52C is off, or when dew condensation prevention control has been operating continuously for 30 minutes.
SRK-H (10) Forced defrosting (Heat pump type only) To test forced defrosting in the operation test mode, the unit may be operated once in the forced defrost mode as shown below. S32, 40 models Temporarily turn off the power source and then perform the following operation using the remote controller within 20 seconds after the power is turned back on.
SRK-H (14) High power operation (Remote controller “HI POWER” button on) [50, 56 model only] The indoor unit fan rotates at speed 4 for 15 minutes, and carries out continuous cooling and heating. (15) Economy operation (Remote controller “ECONO” button on) [50, 56 model only] (a) Cooling economy operation The indoor unit fan operates 2ºC higher than the set temperature at speed 1. (b) Thermal dry economy operation Thermal dry operation carried out at 2ºC higher than the set temperature.
SRK-H 2.5 APPLICATION DATA SAFETY PRECAUTIONS ¡ Please read these “Safety Precautions” first then accurately execute the installation work. ¡ Though the precautionary points indicated herein are divided under two headings, WARNING and CAUTION , those points which are related to the strong possibility of an installation done in error resulting in death or serious injury are listed in the WARNING section.
SRK-H 2.5.1 Selection of location for installation (1) Indoor unit (a) Where there is no obstructions to the air flow and where the cooled air can be evenly distributed. (b) A solid place where the unit or the wall will not vibrate. (c) A place where there will be enough space for servicing. (Where Right side Left side space mentioned below can be secured) (d) Where wiring and the piping work will be easy to conduct.
SRK-H 2.5.2 Installation of indoor unit (1) Installation if installation board (a) Fixing of installation board Lock for the inside wall structures (Intermediate support or pillar) and firmly install the unit after level surface has been checked. Adjustment of the installation board in the horizontal direction is to be conducted with lour screws in a temporary tightened state. Standard hole Adjust so that board will be level by turning the board with the standard hole as the center.
SRK-H (3) Preparation of indoor unit (a) Mounting of connecting wires S 32, 40 models (i) Remove lid. (ii) Remove cover, terminal block cover. (iii) Connect the connection wire securely to the terminal block. 1 Earth Wiring Terminal Connecting Wiring Terminal Block Wiring Clamp Affix the connection wire securely to the terminal block. If the wire is not affixed completely, contact will be poor, and it is dangerous as the terminal block may heat up and catch fire. 2 door connections.
SRK-H [When the pipe is extended to left and taken out from the rear center] (Drain pipe relocation procedure) 1. Remove the drain pipe. 2. Remove the drain cap. 3. Insert the drain cap. 4. Connect the drain pipe. ¡ Loosen the spring clamp to ¡ Remove by hand or use ¡ Securely insert the drain cap ¡ Loosen the spring clamp and remove. cutting pliers, etc. removed in the step 2. securely insert the drain pipe.
SRK-H 2.5.4 Refrigerant piping (1) Preparation Keep the openings of the pipes covered with tapes etc. to prevent dust, sand, etc. from entering them. Indoor unit side Outdoor unit side Remove Remove ¡ Remove the flared nuts. (on both liquid and gas sides) (2) Press Press (Do not turn) Dimension A Liquid side (φ6.35): 9-9.5 dia Gas side (φ9.52): 13.2-14 dia (φ12.7): 16.2-17 dia ¡ Remove the flared nuts.
SRK-H Additional refrigerant charge When refrigerant piping exceeds 7.5m conduct additional refrigerant charge after refrigerant sweeping. Max. 10m Additional charge amount per meter = 20g/m* 10m over 15m Additional charge amount per meter = 30g/m *In case of cooling only unit charge amount is 10g/m [Example for heat pump units] How much amount of additional charge for 10m piping? (10 – 7.5)m × 20g/m = 50g 50g for additional charge How much amount of additional charge for 15m piping? (10 – 7.
SRK-H (220/240V) Model Item High pressure MPa(kgf/cm2) Low pressure MPa(kgf/cm2) Temp. difference between suction air and discharge air (˚C) Running current (A) SRK501HENF-L Cooling SRK561HENF-L – – Heating 1.67~1.86 (17 ~ 19) 1.76 ~ 1.96 (18 ~ 20) Cooling 0.39 ~ 0.49 (4 ~ 5) 0.34 ~0.44 (3.5 ~ 4.5) Heating – – Cooling 12 ~ 16 13 ~ 18 Heating 19 ~ 23 21 ~ 25 Cooling 8.4/8.2 10.2/9.53 Heating 8.5/8.3 10.5/9.
SRK-H 2.6 MAINTENANCE DATA 2.6.1 Trouble shooting (1) Trouble shooting to be performed prior to exchanging PCB, (Printed circuit board) [Common to all models] All the models described in this chapter are controlled by a microcomputer. When providing maintenance service to customers it is necessary to understand the function controlled by a micro computer thoroughly, so as not to mistakenly identify correct operations as mis-operations.
SRK-H (2) Indication of Self Diagnosis (Indoor unit) Connect of Defect TIMER lamp is lights continuously. RUN lamp is lights continuously. Place of defect RUN lamp is flashing. (1 Time flash.) Abnormality of heat exchanger thermistor. ¡ Disconnection of heat exchanger thermistor. RUN lamp is flashing. (2 Time flash.) Abnormality of room temperature thermistor. ¡ Disconnection of room temperature thermistor. RUN lamp is flashing. (6 Time flash.) Abnormality of indoor fan motor.
SRK-H Anormality of thermistor Disconnection of thermistor and defective connection of connector Chart for thermistor temperature resistance characteristics Is connection to connector good? No Repair connector. (Disconnection) Is thermistor resistance value normal? No Resistance value Yes Replace thermistor. Yes (kΩ) Replace PCB. (Short circuit) Temperature (°C) (4) Trouble Diagnostic Procedures Unit malfunctions or does not stop. Indoor lamp of indoor unit does not illuminate.
SRK-H (5) Trouble shooting chart for the room temperature thermistor (Th1), heat exchanger thermistor (Th2) and defrost thermostat (23DH) Unit Thermistor Function Operation Room temperature thermistor (1) (Th1) except for “continuous” thermal setting. Short circuit Cooling Indoor unit Heating Cooling will not operate ¡ FMI : continuous operation ¡ CM,FMo: stopped Heating will not operate (CM, FMo, FMI all stopped) Continuous heating operation.
SRK-H 2.6.2 Servicing (1) Evacuation The evacuation is an procedure to purge impurities ...... noncondensable gas, air, moisture from the refrigerant equipment by using a vacuum pump. Since the refrigerant R407C is very insoluble in water, even a small amount of moisture left in the refrigerant equipment will freeze, causing what is called water clogging. ¡ Evacuation procedure (a) Check to ensure that there is no internal pressure in the unit.
SRK-H 2.6.3 Power supply remote operation When the remote part on indoor unit PCB is modified, the air conditioner is turned ON-OFF by power supply ON-OFF operation without using remote control switch. After the power supply remote operation, the operation contents can be modified by the remote controller.
SRK-H S50,56 models Cut the jumper wire for the “REMOTE” section on the printed circuit board. Carefully position the jumper wire so that it does not come in contact with other parts.
