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15
Trouble shooting
Malfunction
Code
Diagnosis
Malfunction Code
1
Faulty of outdoor unit EEPROM Communication failure
between Module and ECU
Faulty of outdoor unit EEPROM
2
Communication cables broken or not well connected.IPM
overcurrent or short circuit
IPM on the module overcurrent,or short circuit
4
Communication failure between Module and ECU
Communication cables broken or not well connected.
Communication cables broken,or not be well connected,or faulty main
ECU,or faulty module
5
Module operated overload
Module worked overload
6
Module low or high DC voltage (under 192V or above
375V)
VDC
£…
192V or VDC
£
375V
8
Discharging temperature overheating.Lack of refrigerant,
ambient temperature too high or PMVs blocked.
Discharging temperature overheating.Lack of refrigerant,ambient
temperature too high or PMVs blocked.
9
Malfunction of the DC fan motor
Fan is blocked,or the terminal is disconnected from the ECU
10
Malfunction of defrosting temp. sensor(Te)
Sensor disconnected,or broken,or at wrong position or short circuit
11
Malfunction of compressor suction temp. sensor (Ts)
Sensor disconnected,or broken,or at wrong position or short circuit
12
Malfunction of ambient temp. sensor(Ta)
Sensor disconnected,or broken,or at wrong position or short circuit
13
Malfunction of compressor discharge temp. sensor (Td)
Sensor disconnected,or broken,or at wrong position or short circuit
15
Communication failure between indoor&outdoor unit
Wrong connection,or the wires be disconnected,or faulty ECU,or faulty
power supply
17
4-way valve switching failure
Coil of 4-way valve is disconnected,or faulty outdoor ECU
18
Module overcurrent / Module switch failure
Module switch failure,or faulty module
20
Indoor overload
Indoor overload
21
Indoor frosted
Indoor frosted
23
Module temperature too high (Overload Protecter)
Module temperature too high,or the temperature sensor broken(detected
by the ECU)
24
Compressor overcurrent
Over current of the compressor,or malfunction of the module
25
Input overcurrent
Over current of the system,or malfunction with indoor or outdoor fan
motors,or faulty ECU
26
MCU reset
MCU on the ECU reset
27
Module current detect circuit malfunction
Current detect circuit broken,or faulty module
28
Malfunction of liquid pipe temp. sensor for indoor unit A
Sensor disconnected,or broken,or at wrong position or short circuit
29
Malfunction of liquid pipe temp. sensor for indoor unit B
Sensor disconnected,or broken,or at wrong position or short circuit
30
Malfunction of liquid pipe temp. sensor for indoor unit C
Sensor disconnected,or broken,or at wrong position or short circuit
31
Malfunction of liquid pipe temp. sensor for indoor unit D
Sensor disconnected,or broken,or at wrong position or short circuit
32
Malfunction of gas pipe temp. sensor for indoor unit A
Sensor disconnected,or broken,or at wrong position or short circuit
33
Malfunction of gas pipe temp. sensor for indoor unit B
Sensor disconnected,or broken,or at wrong position or short circuit
34
Malfunction of gas pipe temp. sensor for indoor unit C
Sensor disconnected,or broken,or at wrong position or short circuit
35
Malfunction of gas pipe temp. sensor for indoor unit D
Sensor disconnected,or broken,or at wrong position or short circuit
36
Malfunction of gas pipe temp. sensor for indoor unit E
Sensor disconnected,or broken,or at wrong position or short circuit
38
Malfunction of module temp.sensor
Sensor disconnected,or broken,or at wrong position or short circuit
39
Malfunction of condensing temp. sensor(TC)
Sensor disconnected,or broken,or at wrong position or short circuit
40
Malfunction of liquid pipe temp. sensor for indoor unit E
Sensor disconnected,or broken,or at wrong position or short circuit
41
Malfunction of piping temp. sensor(TOCI)
Sensor disconnected,or broken,or at wrong position or short circuit
42
System high pressure switch off
High pressure switch is disconnected,or high pressure switch is broken,or
high pressure switch worked
43
System low pressure switch off
Low pressure switch is disconnected,or low pressure switch is broken,or
lo w pressure switch wo rked
44
System high pressure protection.Refrigerant
overabundance,High condensing temp. or malfunction of
fan motor.
Tc too high and faulty outdoor fan motors when cooling,or faulty indoor
fan motor when heating,or refrigerant overabundance.
45
System low pressure protection.Refrigerant shortage,Low
defrosting temp., or malfunction of fan motor.
Te too low and faulty outdoor fan motors when heating,or faulty indoor
fan motor when cooling,or refrigerant shortage.
46
Malfunction of module temp.sensor
Sensor disconnected,or broken,or at wrong position or short circuit
Содержание YJU3YH019BARRA-X
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