Acson AC Error Codes and Troubleshooting
Ascon AC Maintenance Dubai
The code indication changes as shown below, and notifies with a long beep.
00: Normal
A1: Indoor Pcb Error
A3: Drain Pump Abnormal
A5: Antifreeze (Cooling)/Heat Exchanger Overheat (Heating)
A6: Indoor Fan Motor Abnormalah Electrical Air Cleaner Abnormal
C4: Indoor Heat Exchanger (1) Thermistor Short/open
C5: Indoor Heat Exchanger (2) Thermistor Short/open
C7: Louver Limit Switch Error
C9: Indoor Room Thermistor Short/open
E1: Outdoor Pcb Error
E3: High Pressure Protection
E4: Low Pressure Protection
E5: Compressor Motor Lock/Compressor Overloaded
E6: Compressor Start-up Error
E7: Outdoor Dc Fan Motor Lock
E8: Ac Input Over Current
E9: Exv Error 4 Way Valve Error
F3: Discharge Pipe Overheat
F6: Heat Exchanger Overheat
HO: Compressor Sensor System Error
H3: High Pressure Switch Error
H6: Compressor Feedback Detection Error
H7: Fan Motor Overloaded/Over current/Sensor Abnormal
H8: AC Current Sensor Error
Error Code Faulty Indication Error / Code Faulty Indication
E01: Require manual reset (possible causes)
E02: Compressor 1 high temperature (overload)
E03: Compressor 2 high temperature (overload)
E04: Compressor 3 high temperature (overload)
E05: Compressor 4 high temperature (overload)
E06: Compressor 1 high pressure trip / contact open
E07: Compressor 2 high pressure trip / contact open
E08: Compressor 3 high pressure trip / contact open
E09: Compressor 4 high pressure trip / contact open
E10: Compressor 1 trip/low refrigerant/outdoor abnormal
E11: Compressor 2 trip/low refrigerant/outdoor abnormal
E12: Compressor 3 trip/low refrigerant/outdoor abnormal
E13: Compressor 4 trip/low refrigerant/outdoor abnormal
E14: Room sensor short E32 Compressor 1 de-ice
E15: Room sensor open E33 Compressor 2 de-ice
E16: Indoor coil sensor 1 short E34 Compressor 3 de-ice
E17: Indoor coil sensor 2 short E35 Compressor 4 de-ice
E18: Indoor coil sensor 3 short
E19: Indoor coil sensor 4 short
E20: Indoor coil sensor 1 open
E21: Indoor coil sensor 2 open
E22: Indoor coil sensor 3 open
E23: Indoor coil sensor 4 open
E24: Outdoor coil sensor 1 short
E25: Outdoor coil sensor 2 short
E26: Outdoor coil sensor 3 short
E27: Outdoor coil sensor 4 short
E28: Outdoor coil sensor 1 open
E29: Outdoor coil sensor 2 open
E30: Outdoor coil sensor 3 open
E31: Outdoor coil sensor 4 open
E32: Compressor 1 de-ice
E33: Compressor 2 de-ice
E34: Compressor 3 de-ice
E35: Compressor 4 de-ice
Error Diagnosis by Wired Controller (MC301) Item Code Description
E0: System malfunction
E1: Sensor Broken (TH1 discharge Temp.)
E2: Sensor Broken (TH2 inlet coil 1#)
E3: Sensor Broken (TH3 mid coil 1#)
E4: Sensor Broken (TH4 inlet coil 2#)
E5: Sensor Broken (TH5 mid coil 2#)
E6: Sensor Broken (TH6 inlet coil 3#)
E7: Sensor Broken (TH7 mid coil 3#)
E8: Sensor Broken (TH8 ambient temp)
E9: Sensor Broken (TH9 outlet coil)
EA: Sensor Broken (TH10 subcool outlet)
EB: Sensor Broken (TH11 subcool suction)
EC: Sensor Broken (TH12 suction)
EF: Emergency Run
F0: Outdoor Storage Malfunction
F1: Sensor Broken (indoor inlet coil)
F2: Sensor Broken (indoor mid coil)
Error Diagnosis by Wired Controller (MC301) Item Code Description
F3: Sensor Broken (indoor outlet coil)
F4: Sensor Broken (indoor return air)
F5: Sensor Broken (indoor supply air
F6: Indoor and controller communication malfunction
F7: Ambient temp exceed the limit
F8: 4WV malfunction
F9: Refrigerant leakage
FA: Controller storage malfunction
FB: Water Pump (indoor water pump)
FC: Indoor and outdoor communication malfunction
FE: Master and slave communication malfunction
H0: Digital comp overload
H1: Fixed Comp1 overload
H2: Fixed Comp2 overload
H3: Fixed Comp3 overload
H4: High pressure too high
H5: Sensor broken, high pressure
H6: Discharge temp too high
L0: Super heat too low
L1: Low pressure too low
L2: Sensor broken, low pressure
10: System malfunction
11: Sensor broken (slave TH1 discharge temp)
12: Sensor broken (slave TH2 inlet coil 1#)
13: Sensor Broken (slave TH3 mid coil 1#)
14: Sensor broken (slave TH4 inlet coil 2#)
15: Sensor broken (slave TH5 mid coil 2#)
16: Sensor broken (slave TH6 inlet coil 3#)
17: Sensor broken (slave TH7 mid coil 3#)
18: Sensor broken (slave TH8 ambient temp)
19: Sensor broken (slave TH9 outlet coil)
1A: Sensor broken (slave TH10 subcool outlet)
1B: Sensor broken (slave TH11 subcool suction)
1C: Sensor Broken (slave TH12 suction)
1F: Emergency run (slave)
20: Outdoor storage (slave)
27: Ambient temp exceed the limit (slave)
28: 4WV malfunction (slave)
29: Refrigerant leakage (slave)
30: Digital comp overload (slave)
31: Fixed comp1 overload (slave)
32: Fixed comp2 overload (slave)
33: Fixed comp 3 overload (slave)
34: High pressure too high (slave)
35: Sensor broken, high pressure (slave)
36: Discharge temp too high (slave)
40: Super heat too low (slave)
41: Low pressure too low (slave)
42: Sensor broken, low pressure (slave)
A1: Indoor PCB error
A3: Drain pump fault
A5: Antifreeze (Cooling) / Heat exchanger overheat(Heating)
A6: Indoor fan motor fault
AH: Electrical air cleaner fault
C4: Indoor heat exchanger (1) thermistor short/open
C5: Indoor heat exchanger (2) thermistor short/open
C7: Louver limit switch error
C9: Indoor room thermistor short/open
E1: Outdoor PCB error
E3: High pressure protection
E4: Low pressure protection
E5: Compressor motor lock/compressor overloaded
E6: Compressor start-up error
E7: Outdoor DC fan motor lock
E8: Ac input over current
E9: EXV error
EA: 4 way valve error
F3: Discharge pipe overheat
F6: Heat exchanger overheat
HO: Compressor sensor system error
H3: High pressure switch error
H6: Compressor feedback detection error
H7: Fan motor overloaded/over current/sensor fault
H8: AC current sensor error
H9: Outdoor air thermistor short/open
J1: Pressure sensor error
J3: Compressor discharge pipe thermistor short/open/misplaced
J5: Suction pipe thermistor short/open
J6: Outdoor heat exchanger thermistor short/open
J7: Sub cooling heat exchanger thermistor short/open
J8: Liquid pipe thermistor short/open
J9: Gas pipe thermistor short/open
L1: Inverter outdoor PCB error
L3: Outdoor control box overheat
L4: Heat sink overheat
L5: IPM error/IGBT error
L8: Electrical thermal switch
L9: Stall prevention
LC: Communication error (outdoor PCB & inverter PCB)
P1: Open phase or voltage unbalance
P4: Heat sink thermistor short/open
PJ: Capacity setting error
U0: Insufficient gas
U2: DC voltage out of range
U4: Communication error
U7: Communication error (outdoor PCB & IPM PCB)
UA: Installation error
UF: Piping & wiring installation mismatch/wrong wiring/insufficient gas
UH: Anti freeze (other rooms)
Troubleshooting
If any malfunction of the air conditioner unit is noted, immediately switch off the power supply to the unit. Check the following fault conditions and causes for some simple troubleshooting tips.
Fault: The compressor does not operate 3 minutes after the air conditioner unit is started.
Causes / Action: -Protection against frequent starting. Wait for 3 to 4 minutes for the compressor to start operating.
Fault: The air conditioner unit does not operate.
Causes / Action:
– Power failure, or the fuse needs to be replaced.
– The power plug is disconnected.
– It is possible that your delay timer has been set incorrectly.
– If the fault persist after all these verifications, please contact the air conditioner unit installer.
Fault: The air flow is too low
Causes / Action:
– The air filter is dirty.
– The doors or windows are open.
– The air suction and discharge are clogged.
– The regulated temperature is not high enough
Fault: Discharge air flow has bad odour.
Causes / Action:
– Odours may be caused by cigarettes, smoke particles, perfume etc. which might have adhered onto the coil.
Fault: Condensation on the front air grille of the indoor unit.
Causes / Action:
– This is caused by air humidity after an extended long period of operation.
– The set temperature is too low, increase the temperature setting and operate the unit at high fan speed.
Fault: Water flowing out from the air conditioner unit.
Causes / Action: – Switch off unit and call dealer
Fault: Hissing air flow sound from the air conditioner unit during operation.
Causes / Action: – Refrigerant fluid flowing into the evaporator coil
If the fault persists, please call Ac Maintenance Dubai
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