Service manual Room airconditioner Split Wall-Mounted Type NOTE: Before servicing the unit, please read this first Always contact with your service center if meet problem.
Table of Contents 1、Summary ………………………………………………………………………………………………………………3 2、Model explaining …………………………………………………………………………………………………….4 3、Installation……………………………………………………………………………………………………………..4 4、Exploded view and part list………………………………………………………………………………………..8 5、Operation principle………………………………………………………………………………………………….9 6、Specifications…………………………………………………………………………………………………………10 7、Wiring diagrams……………………………………………………………………………………………………...11 8、PCB principle chart……………………………………………………………………………………………….....
1. Summary 1.1 indoor unit Model 38B model 85 1.
2、Model explaining c Improve an ordinal number Divide the body outdoors box a body code External appearance characteristic code Separately the body indoor machine(or whole type) style code Separately the body pit code inside the indoor machine(or whole type) Code of refrigerant type：no code - R22；C-R407c、A-R410a Power type：1:115v/60Hz 2:220V/60Hz；3:220-240V/ 50Hz；4:240V/50Hz； Main function code: c-Cold breeze type;H-Hot pump type;A-Hot pump the type take assistance electricity to heat;E-The electricity h
3. Attention of installation 3.1 Safety Precaution ■To prevent injury to the user or other people and property damage, the following instructions must be followed. ■Incorrect operation due to ignoring instruction will cause harm or damage. ■Before service unit, be sure to read this service manual at first. 3.2 Warning ﹥Installation ■Do not use a defective or underrated circuit breaker. Use this appliance on a dedicated circuit. There is risk of fire or electric shock.
■Be sure the installation area does not deteriorate with age. If the base collapses, the air conditioner could fall with it, causing property damage, product failure, and personal injury. ■Do not let the air conditioner run for a long time when the humidity is very high and a door or a windows is left open. Moisture may condense and wet or damage furniture. ■Take care to ensure that power cable could not be pulled out or damaged during operation. There is risk of fire or electric shock.
There is risk of fire, electric shock, or product damage. ■Ventilate the product from time to time when operating it together with a stove, etc. There is risk of fire or electric shock. ■Turn the main power off when cleaning or maintaining the product. There is risk of electric shock. ■When the product is not be used for a long time, disconnect the power supply plug or turn off the breaker. There is risk of product damage or failure, or unintended operation.
■Use a soft cloth to clean. Do not use harsh detergents, solvents, etc. There is risk of fire, electric shock, or damage to the plastic parts of the product. ■ Do not touch the metal parts of the product when removing the air filter. They are very sharp. There is risk of personal injury. ■ Do not step on pr put anything on the product. (outdoor units) There is risk of personal injury and failure of product. ■Always insert the filter securely. Clean the filter every two weeks or more often if necessary.
■Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Grade Unit 7K 9K 12K 18K 24K 28K mm2 1.0 1.0 1.5 2.5 2.5 2.5 ■ Pipe length and the elevation Standard length Capacity Max. Max. Additional Elevation Elevation refrigerant B (m) A (m) (g/m) Pipe size (m) Btu/h GAS LIQUID 9K-12K 3/8’’ (φ9.52) 1/4’’ (φ6.35) 3.5 5 10 30 18K-22K 1/2’’ (φ12.7) 1/4’’ (φ6.35) 4 10 15 30 24K-28K 5/8’’ (φ15.88) 3/8’’ (φ9.
5.2 Heat pump mode 6.
7.Wiring diagrams 7.
7.
8.PCB principle chart 8.1、38 section of crystal color ordinary schematic diagram 3 4 B E1 C13 10 4 8 P07 30 20 X3A 13 4 P32 GND P33 C15 10 2 HSTP.0 B 16 电加热 26 P12 D11 GND 41 48 外风 机 X4A FM O 15 外风 机 2 52 X4B P11 Q 5 制热 5 DATA GND 4 D7 41 48 IC1 R8 4. 7 K R9 4. 7 K 74 AL S1 64 电 加 热 /无 HSTP.1 32 R13 IN41 48 18 15 4. 7 K 4. 7 K R7 B L1 C24 U2 GND GND 8 R6 4. 7 K P00 +5 2 Q7 18 15 GND 13 P34 1 XL 8. 0 0 R20 4.
2 3 FU S E 火线 4 5 L1 FU S E +ZR 6 B 1 0 A- 1 8 0 - 6 2 1 R1 1 T1 CNC 8 编号 +5 Vin 51 /2W CNB 2 5 0 V/3 .1 5 A 7 IC 6 7805 3 Vout G ND 1 JS2-B65aC-M11A/0 E1 D1 -D 4 D 5 2 CB 1 10 低风 CN U 7 8 C2 2 1 0 0 /1 W P3 0 E3 1 0 0 UF/2 5 V GND 11 0 .1 u f/27 5 V IC 2 F 18 6 CFO 4 高风 电 容 3 .5 UF/50 0 V 低风 X3 B 中风 X4 B 高风 X5 B IC 2 E 12 P3 1 19 5 X2 A P0 3 4 20 IC 3 2003 1 4.
1 2 3 4 5 6 7 B U1 L Vin 4 3 1 2 D1 - D4 4001 C1 2 1 0 4 / 2 75 AC- N 编号 3 OUT JS2-B85AC-M01A/0 GN D L1 火线 由 压 机 的 ON端引人 8 +5 1 安规 电 容 E1 C1 I C4 7805 C2 10 4 E1 E3 2 F USE+ ZR F USE C3 104 4 7 0 UF / 2 5 V T RANS 1 0 0 0 UF/ 3 5 V 1 0 4 4 7 0 UF / 5 0 V 零线 D D N HI IC1 U1 X3 B B GND C5 IC1 X4 B MI D I C4C 9 B MF1 低风 X5 B 中风 X4 B P07 14 R9 30 220 4148 D6 4 .
9. PCB function: NOTE: Ts is the set temperature, Tr is indoor room temperature, TP1 is indoor coil pipe temperature, TP2 is outdoor coil pipe temperature. Display panel [1]only two LED ①running lamp(green)：power on light, flash one time/ one second during anti cooled wind. ②timer lamp(yellow)：only light at timer state. [2]eleven LED ① running lamp(green)：power on light, flash one time/ one second during anti cooled wind. ②temperature lamp(green)：16～31℃ set temp. and room temp. display, light is set temp.
Cooling ● Start up the compressor: when the room temperature is more than Ts+1℃, compressor → start-up ● Shut down the compressor: when the room temperature is less than or equal to the set temperature Ts-1℃, compressor → shutdown ● When the temperature of coil pipe of the indoor units is less than or equal to 1℃ for one minute and the compressor has continuous run for more than ten minutes, the compressor and outdoor blower fan shut down through the electric control board and the indoor blower fan is
Tr 7¡ ã C 1¡ ã C -10¡ ã C compr essor out door bl ower f an door bl ower f an Tr compr essor door bl ower f an Heating (only applicable to heat pump units) ● Start up the compressor: when the room temperature is less than Ts-1℃, compressor → start-up ● Shut down the compressor: when the room temperature is more than or equal to the set temperature Ts+3℃, 21
compressor → shutdown ● The electric heating start-up in the heating mode shall meet the following conditions: ① start up the compressor and indoor blower fan ② none defrost ③ TP1< 49℃ ④Tr ≤20℃. ● The electric heating shutdown in the heating mode shall meet one of the following conditions: ① shutdown indoor blower fan ② Tr ≥ 23℃ ③ TP1≥50℃. ● In the heating mode, the indoor flower fan can be set as high/ medium/ low /automatic running mode by remote control however the anti cool air function is prior.
Tr Tr +3 -1 over 6 MIN COMPRESSOR out door bl ower f an four-way valve bl ower f an st ar t - up st ar t - up st ar t - up st ar t - up l ower l ow speed speed st ar t - up st ar t - up 2 MIN st ar t - up l ower l ow speed speed l ow speed 23 st ar t - up 2 MIN st ar t - up
Tr 36 compr essor door bl ower f an Defrost (only applicable to the heating mode) 1. the intelligent defrost In the heating mode, the electric control board checks and compares the temperature of indoor room and indoor coil pipe after the compressor works for a while; judge whether the outdoor heat exchanger part is frosted or not according to conditions such as the change of indoor coil pipe temperature; if it is judged as frosted, it automatically enters defrosting process.
80 ≤3 （2）end defrost condition(meet one of follows) a、defrost time have fifteen minutes. b、defrost relay turn on； （＞8℃） c、press ON/OFF key in defrost process. 3. Outdoor sensor for defrost ① unit start defrost shall meet one of the following conditions： a. compressor cumulate running time over 30 minutes and it continuous running over 3 minutes, the temperature of coil pipe of the outdoor units is equal to or less than －15℃ for one minutes (Tp2≤-15℃). b.
Tr TP2 compr essor out door bl ower f an door bl ower f an Tr TP2 compr essor out door bl ower f an door bl ower f an 26
Tr TP2 defrost time over 15 MIN or TP2 >15¡ ã C compr essor out door bl ower f an door bl ower f an ■ Sequence chart in defrosting mode st ar t def r ost end def r ost def r ost compr essor st ar t - up shut down out door bl ower f an st ar t - up our - way val ve door bl ower f an st ar t - up st ar t - up st ar t - up shut down shut down st ar t - up st ar t - up shut down st ar t - up shut down st ar t - up Dehumidification Dehumidification running is to eliminate the water vapor
Tr ¡ ã C ¡ ã C Tr ≤ 10℃ i ndoor bl ower f an l ow speed f or bi d dehumi di f y st ar t - upshut down st ar t - up shut down shut down st ar t - up shut down st ar t - up shut down door shut down st ar t - up shut down shut down st ar t - up shut down st ar t - up shut down bl ower f an st ar t - up shut down ● In the dehumidification mode, the indoor fan is running at the low speed for twenty seconds at first, then it select working mode.
mode had set , it doesn’t change by Tr and the default set temperature is 25 ℃. Tr 26¡ ã C 21 25 mode Time on and time off When the time on or time off is used, the clock of remote controller shall be corresponding to the current clock and the timing times is less than or equal to 24 hours, when the timing time is reached, unit will start-up or shutdown. Sleep function When the sleep key is press, air conditionerenter sleep state, indoorblower fan running at low speed, only sleep indication display.
on state SEC display at flicker 1/3 indication 1、 Normal (during heating mode ) anti cold wind off state SEC 2、It will be removed when the coil pipe temperature sensor reaches certain temperature. 1、Check whether the resistance of the sensor is normal (the resistance is 5КΩ in the normal temperature 25℃), when it is abnormal the sensor should be replaced. display at display at flicker 1/1 E2 room temp.
the key is to check the evaporator temperature detected by the coil pipe temperature sensor has reached the cooling or heating temperature. 4、Check whether the surface of the condenser is too dirty, it should be cleaned when it is too dirty. 5、Check whether the capacitance of the outdoor motor and the fan is damaged, it should be replaced when it is damaged. 6、If the above items are normal, the electric control board should be replaced.
disconnected, replace or connect the feedback signal wire. 6、Check whether the supply power is phase-lacking or phase opposition. 7、Check whether the AC electromagnetic contactor is well. 1、Check whether the filter of the indoor unit is dirty or blocked, and clean if it is dirty. 2、Check whether the indoor fan is running normally, frost display at flicker 8/10 display at E8 and replace the motor if it is abnormal.
10. TROUBLE SHOOTING Indoor Tr sensor error Is CN (Tr sensor connector) connected properly? NO Connect CN properly. YES Is Tr sensor resistance value (5KO at 25? ) normal? NO Replace TA sensor. YES Indoor P. C. board is defective. Replace P. C. board. Indoor TP1 sensor error Is CN (TP1 sensor connector) connected properly? NO Connect CN properly. YES Is TP1 sensor resistance value (5KO at 25? ) normal? NO Replace TC sensor. YES Indoor P. C. board is defective. 33 Replace P. C. board.
Only indoor fan motor does not operate. (1) Is it possible to detect the power supply voltage (200-240V) between L and N on the terminal block? (2) Does the indoor fan motor operate in cooling operation? Turn off power supply once, and turn it on again. Does compressor continue to operate? YES NO Is it possible to detect AC 220V between pin(high/middle/low) and pin(common) of motor connector . Start to operate indoor unit in cooling operation at airflow level “ LOW” ,wait three minutes.
Compressor does not operate. Turn on power supply. Does OPERATION indication indicate? (1) Is the room temperature higher than the preset temperature in cooling operation? (2) Is the crossover cable connected properly? NO Check power supply. YES Does compressor delay three minutes by temperature changes or others? NO Is resistance value of room sensor (Tr) and heat exchanger sensor (TP1) normal? NO Room sensor or heat exchanger sensor is defective.
Press START/STOP button. Is transmission mark indicated? The unit does not beep at all. OPERATION indication on indoor unit is not indicated. NO YES Is receiver on indoor unit exposed to direct sunlight? Press RST button on remote control with tip of pencil. NO YES YES Is there any thyristor fluorescent light nearby? NO NO YES Does indoor unit operate when moving remote control near receiver or indoor unit? YES YES Press START/STOP button. Batteries are exhausted.
Trouble shooting NO Trouble Is the unit display normal? YES Check power supply mains or interconnection wires YES Does outdoor unit run? YES NO Is the power applied to the unit? NO Does the compressor run normally? Is the power normal? check the voltage between L&N of terminal block Check the compressor ,wires and it’ s capacitor.
Indoor unit and outdoor unit don’ t operate Indoor and outdoor unit don’ t operate Does the electric switch cut off after a few nimutes? Does the electric switch cut off? YES Is the power supply no problem? YES NO Reconnect the wires. NO Change a good remote, does the air conditioner running? Is the insulation of indoor unit and outdoor unit no problem? Press emergency key, does the air conditioner running? Replace remote control. YES Replace remote receiver or display panel.
