Acson AC Error Codes Troubleshooting
Acson AC Maintenance in Dubai
As seen below, the code indicator changes and notifies you with a long beep.
Ascon Wall Mounted Inverter AC Error Codes:
| Error Codes | Operation / Faulty Indication |
|---|---|
| E1 | Room air sensor contact loose / short. Check room sensor connection / change room sensor |
| E2 | Indoor coil sensor contact open. Check indoor coil sensor connection / change indoor coil sensor |
| E3 | Outdoor coil sensor contact open. Check outdoor coil sensor connection / change outdoor coil sensor |
| E4 | Compressor overload protection / Indoor / Outdoor coil sensor short. If running ampere highly increase, change the compressor. If not, replace the coil sensor |
| E5 | Gas leak. Check for leakage & repair / Top up refrigerant |
| E6 | Pump fault. Clear the clogging at drain pipe. If pump is not working, change the pump |
| E7 | Outdoor coil sensor exist (MS model). Remove outdoor coil sensor |
| E8 | Hardware error (tact switch pin short). Check for the tact switch pin condition |
| E9 | No Feedback from indoor fan. Check indoor fan motor / fan motor wiring |
| EE | EEPROM defrost |
Error Codes for G18 and GS02 – Inverter Y Models
Netware 3C / SLM 9 – Inverter Y Models (Except 5WMY-J/JR)
| Error Codes | Problem |
|---|---|
| 00 | Normal |
| U0 | Insufficient gas |
| U2 | DC voltage out of range |
| U4 | Communication error |
| U7 | Signal transmission error (on outdoor unit PCB) |
| UA | Installation error |
| UF | Communication Error (indoor and outdoor) piping and wiring |
| UH | Anti-freeze function in other room |
| A1 | Indoor PCB error |
| A3 | Water pump error |
| A5 | Antifreeze |
| A6 | Indoor fan motor abnormal |
| C4 | Indoor heat exchanger thermistor short/ open |
| C9 | Indoor room thermistor short/ open |
| E1 | Outdoor PCB error |
| E3 | High pressure protection |
| E4 | Low pressure protection |
| E5 | Compressor motor lock |
| 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 |
| H0 | Compressor sensor system abnormality |
| H3 | High pressure switch error |
| H6 | Position sensor abnormality |
| 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 |
| J7 | Subcooling heat exchanger thermistor short/ open |
| J8 | Liquid pipe thermistor short/ open |
| J9 | Gas pipe thermistor abnormality |
| LC | Communication error (control PCB and inverter PCB) |
| L1 | Outdoor PCB error |
| L3 | Electrical box temperature rise |
| L4 | Heat sink overheat |
| L5 | IPM error / IGBT error |
| L9 | Stall prevention |
| P1 | Open phase or voltage unbalance |
| P4 | Heat sink thermistor short / open |
| PJ | Capacity setting error |
Error Codes for Sequential Controller (SQ LCD) – SB & RT Multi Compressors
| Error Codes | 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 |
| E15 | Room sensor open |
| E16 | Indoor coil sensor 1 short |
| E17 | Indoor coil sensor 2 short |
| 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)
| Error Codes | Meaning |
|---|---|
| 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) |
R410A Multi Digital Scroll System Acson MDS-B Series
| Error Codes | Meaning |
|---|---|
| EC00 | 00## indoor unit communication |
| EC01 | 01# indoor unit communication failure |
| …. | 02~47# indoor unit communication failure |
| ER48 | Digital Compressor Overload |
| ER49 | Fix 1 Compressor Overload |
| ER50 | Fix 2 Compressor Overload |
| ER51 | Fix 3 Compressor Overload |
| ER52 | Discharge pressure too high |
| ER53 | Suction pressure is too low |
| ER54 | Outdoor unit’s IC error |
| ER55 | System Error |
| ER56 | Discharge temperature is too high |
| ER57 | – |
| ER58 | 4 way valve failure |
| ER59 | Ambient temperature is beyond the limit |
| ER60 | Emergency run |
| ER61 | Sub heating is beyond the limit |
| ER62 | Refrigerant released |
| ER63 | Slaver outdoor unit communication failure |
| ER64 | TH1 temperature sensor failure |
| ER65 | TH2 temperature sensor failure |
| ER66 | TH3 temperature sensor failure |
| ER67 | TH4 temperature sensor failure |
| ER68 | TH5 temperature sensor failure |
| ER69 | TH6 temperature sensor failure |
| ER70 | TH7 temperature sensor failure |
| ER71 | TH8 temperature sensor failure |
| ER72 | TH9 temperature sensor failure |
| ER73 | TH10 temperature sensor failure |
| ER74 | TH11 temperature sensor failure |
| ER75 | TH12 temperature sensor failure |
| ER76 | Discharge pressure sensor failure |
| ER77 | Suction pressure sensor failure |
| EC78 | All indoor units Communication Failure |
Acson Air Conditioner LED Lights Diagnosis Table
Acson Air Conditioner Troubleshooting
If there is a failure in the Acson Air Conditioner unit, switch the power supply to the unit off immediately. For some simple troubleshooting tips, check the following fault conditions and causes.
Fault: After starting the air conditioner unit, the compressor does not operate for 3 minutes.
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 unplugged.
– It is possible that your delay timer has been set incorrectly.
– If the fault persist after all these verifications, please contact Al Kassar AC Spare Parts Trading Company in Dubai.
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: Air flow has bad odor.
Causes / Action:
– Odors may be caused by cigarettes, smoke particles, perfume etc. which might have stick onto the Air Conditioner coil.
Fault: Condensation on the front air grill 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 Air Conditioner and contact Ac Maintenance Company.
Fault: Air flow sound from the air conditioner unit during operation.
Causes / Action: – Refrigerant fluid flowing into the Air Conditioner evaporator coil
If the fault remains, please call Ac Repair and Servicing Company.
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