Related Manuals for Air-Con 38B
Summary of Contents for Air-Con 38B
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Page 1: Service Manual
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. -
Page 2: Table Of Contents
Table of Contents ………………………………………………………………………………………………………………3 1、Summary …………………………………………………………………………………………………….4 2、Model explaining ……………………………………………………………………………………………………………..4 3、Installation ………………………………………………………………………………………..8 4、Exploded view and part list ………………………………………………………………………………………………….9 5、Operation principle …………………………………………………………………………………………………………10 6、Specifications ……………………………………………………………………………………………………...11 7、Wiring diagrams ………………………………………………………………………………………………..16 8、PCB principle chart 9、PCB function …………………………………………………………………………………..10、Troubleshooting……………………………………………………………………………….. -
Page 3: Summary
1. Summary indoor unit Model 38B model 85 1.2 outdoor unit 9000BTU 12000～18000 BTU 22000 BTU 24000～26000 BTU... -
Page 4: Model Explaining
2、Model explaining 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；... -
Page 5: Installation
3. Attention of installation 3.1 Safety Precaution ■ followed. To prevent injury to the user or other people and property damage, the following instructions must be ■ 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 ■... - Page 6 ■ 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.
- Page 7 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.
- Page 8 ■ 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.
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Page 9: Refrigerant Cycle Diagram
■ Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Grade Unit ■ Pipe length and the elevation Standard length Max. Max. Additional Capacity Pipe size Elevation Elevation refrigerant Btu/h LIQUID B (m) A (m) (g/m) 3/8’’... -
Page 10: Specifications
5.2 Heat pump mode 6. Specifications (see spec sheet) -
Page 11: Wiring Diagrams
7.Wiring diagrams 7.1Indoor unit... - Page 15 7.2 Outdoor unit...
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Page 16: Pcb Principle Chart
8.PCB principle chart 8.1、38 section of crystal color ordinary schematic diagram 编 号 变 压 器 次级 JS2-B38aC-M15A/0 78 05 51 /1W AC.ZERO 零 线 D1-D4 JL C03 01 47 1 1 0A 10 4/2 75 V 10 4/2 75 10 4 10 4 10 4... - Page 17 IC 6 FU S E +ZR 编 号 JS2-B65aC-M11A/0 7 8 0 5 1 0 A- 1 8 0 - 6 2 1 FU S E 火 Vout 线 51 /2W 2 5 0 V/3 .1 5 A C2 1 1 0 4 2 2 0 UF/2 5 V 1 0 4...
- Page 18 编 号 F USE+ ZR 安 规 电 容 JS2-B85AC-M01A/0 F USE D1 - D4 火 端引人 线 由 压 机 的 ON 4 0 0 1 C1 2 I C4 1 0 4 / 2 75 7 8 0 5 AC- N 1 0 4 10 4...
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Page 19: Pcb Function
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. - Page 20 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℃...
- Page 21 7¡ ã C 1¡ ã C -10¡ ã C com pr essor out door bl ow er f an door bl ow er f an com pr essor door bl ow er f an Heating (only applicable to heat pump units) Start up the compressor: when the room temperature is less than Ts-1℃, compressor →...
- Page 22 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 ●...
- Page 23 over 6 MIN st ar t - up st ar t - up C O M PR ESSO R st ar t - up out door st ar t - up st ar t - up st ar t - up bl ow er f an four-way 2 MIN...
- Page 24 com pr essor door bl ow er 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;...
- Page 25 ≤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℃...
- Page 26 com pr essor out door bl ower f an door bl ower f an com pr essor out door bl ower f an door bl ower f an...
- Page 27 defrost time over 15 MIN or TP2 >15¡ ã C com pr essor out door bl ow er f an door bl ow er f an ■ Sequence chart in defrosting mode st ar t def r ost end def r ost def r ost st ar t - up shut dow n com pr essor...
- Page 28 ¡ ã C ¡ ã C Tr ≤ 10℃ i ndoor l ow speed bl ow er f an f or bi d dehum i di f y st ar t - up st ar t - up st ar t - up shut dow n st ar t - up shut dow n shut dow n...
- Page 29 mode had set , it doesn’t change by Tr and the default set temperature is 25 ℃. 26¡ ã C m ode 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.
- Page 30 on state indication 1、 Normal (during heating mode ) display at flicker 1/3 anti cold wind 2、It will be removed when the coil pipe temperature off state sensor reaches certain temperature. 1、Check whether the resistance of the sensor is normal (the resistance is 5КΩ...
- Page 31 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.
- Page 32 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...
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Page 33: Troubleshooting
10. TROUBLE SHOOTING Indoor Tr sensor error Is CN (Tr sensor connector) Connect CN properly. connected properly? Is Tr sensor resistance value Replace TA sensor. (5KO at 25? ) normal? Indoor P. C. board is defective. Replace P. C. board. Indoor TP1 sensor error Is CN (TP1 sensor connector) - Page 34 Only indoor fan motor does not operate. <Primary check> (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.
- Page 35 Compressor does not operate. Turn on power supply. <Primary check> (1) Is the room temperature higher than the preset temperature in cooling operation? (2) Is the crossover cable connected properly? Does OPERATION Check power supply. indication indicate? Does compressor delay Is resistance value of room Room sensor or heat three minutes by...
- Page 36 The unit does not beep at all. Press START/STOP OPERATION indication on button. indoor unit is not indicated. Is transmission mark indicated? Press RST button on remote control Is receiver on with tip of pencil. indoor unit exposed to direct sunlight? Does indoor unit Is there any thyristor operate when...
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Page 37: Trouble Shooting
Trouble shooting Trouble Is the unit display Is the power Check power supply mains or normal? applied to the unit? interconnection wires Does outdoor unit run? Is the power normal? check Check the wiring of indoor and the voltage between L&N of outdoor terminal block Check the... - Page 38 Indoor unit and outdoor unit don’ t operate Indoor and outdoor unit don’ t operate Does the electric switch Does the electric switch Is the power supply no Make the power cut off after a few supply ok. cut off? problem? nimutes? Is the wires of indoor...