Haier Air conditioner error codes

Most often, the errors of the Haier air conditioners are caused by improper use and useless attempts to repair appliances on ones` own. Having studied Haier air conditioner error codes, it will be much easier to figure out. The table with decoding of such error codes is shown below.

Haier MRV II Air conditioner error codes

digital tube indication on master unitindication on wired controller (hex)failure code definitionfailure description
2020master unit defrosting temp, sensor Te failurethe sensor voltage is below 0.1V (open circuit) or over 4.8V (short circuit) for 1 minute, not alarm in defrosting and within 3 minutes after defrosting.
2120master unit ambient temp, sensor Ta failurethe sensor voltage is below 0.1V (open circuit) or over 4.8V (short circuit) for 1 minute, not alarm in defrosting and within 3 minutes after defrosting.
2220master unit suction temp, sensor Ts failurethe sensor voltage is below 0.1V (open circuit) or over 4.8V (short circuit) for 1 minute, not alarm in defrosting and within 3 minutes after defrosting.
2320master unit discharging temp, sensor Td failureafter compressor runs for 5 minutes, sensor voltage is below 0.1V(open circuit) or over 4.8V (short circuit) for 1 minute, not alarm in defrosting or within 3 minutes after defrostinq
2420master unit oil temp, sensor Toil failurethe sensor voltage is below 0.1V (open circuit) or over 4.8V (short circuit) for 1 minute, not alarm in defrosting and within 3 minutes after defrosting.
2520heat exchanger inlet temp. Toci failurethe sensor voltage is below 0.1V (open circuit) or over 4.8V (short circuit) for 1 minute, not alarm in defrosting and within 3 minutes after defrosting.
2720master unit oil temp, too highwhen compressor is running, oil temp, is no less than SO’C, unit stops and alarms for 4 minutes; after compressor stops, when oil temp, is no more than 70'C for 1 minute, resumable. If the failure occurs 3 times in an hour, confirm the alarm.
2820master unit high pressure sensor Pd failurethe sensor voltage is below 0.1V (open circuit) or over 4.8V (short circuit) for 30 seconds, not alarm in defrosting and within 3 minutes after defrosting.
2920master unit low pressure sensor Ps failurethe sensor voltage is below 0.1V (open circuit) or over 4.8V (short circuit) for 30 seconds, not alarm in defrosting and within 3 minutes after defrosting.
3020master unit high pressure switch failurewhen compressor is running, if switch opens for 1 minute, alarm; after the unit stops for 2 minutes and 50 seconds, resumable. If the failure occurs 3 times in an hour, confirm the alarm.
3120master unit low pressure switch failurecompressor stops, if detecting pressure switch for 30 seconds, alarm; after compressor is running for 10 minutes, switch opens for 1 minute, alarm; if the failure occurs 3 times in an hour, confirm the alarm. Not detect in the course of soft start, defrosting and within 3 minutes after defrosting, oil return and within 5 minutes after oil return.
3220overcooling heat exchanger outlet temp. Tsco failurethe sensor voltage is below 0.1V (open circuit) or over 4.8V (short circuit) for 1 minute, not alarm in defrosting and within 3 minutes after defrosting.
3320EEPROM failure of master unit main chip 849EEPROM faulty, or being inserted conversely, with incorrect part
3420master unit discharging temp. Td protectionTd sensor is over 120*C for 10 seconds, unit stops and alarms; 2 minutes and 50 seconds later, resumable. If it occurs 3 times in an hour, confirm the alarm.
3620master unit oil temp, too lowcompressor is running. Toil < PS+10 for 4 minutes or Toil 1. When Ta<=0X:, Toil>=Ps+10 and Toil >=6;
2.When Ta>0‘C, Toil>=Ps+10 or Toil >=36
3820master unit high pressure sensor Pd too low protectioncompressor is running, detecting Pd sensor is below 17. 8kg/cm2. and compression ratio is below 2 for 5 minutes, the unit stops and alarms. Not detect in the course of defrosting, within 3 minutes after defrosting, oil return, within 5 minutes after oil return.
3920master unit low pressure sensor Ps too low protectioncompressor is running, detecting Ps sensor is below 0. Skg/cm^or 10 seconds; in oil return, detecting Ps sensor is below 0.3kg/cm*for 10 seconds, the unit stops and alarms. 2 minutes and 50 seconds later after unit stops, resume.
4020master unit high pressure sensor Pd too high protectioncompressor is running, detecting Pd sensor is over 40kg/cmifor 10 seconds: the unit stops and alarms. 2 minutes and 50 seconds later after unit stops, resume. If it occurs 3 times in an hour, confirm the alarm
4320discharging temp, sensor Td protectioncompressor is running. Td
4420communication between master unit main chip 849 and communication chip 849 failureno communication for 4 minutes
4620communication between connecting board and module board failureno communication for 4 minutes
4720radiator failureradiator temp, is over 95degree. the unit alarms. 2 minutes and 50 seconds later after unit stops, resume.
4820ACCT over current protection (instant value)ACCT sensor detects that he instant current peak value between U and V is over 94A. 2 minutes and 50 seconds later after the unit stops, resume.
4920ACCT over current protection (virtual value)ACCT sensor detects that he instant current peak value between U and V is over 34Arms. 2 minutes and 50 seconds later after the unit stops, resume.
5020over voltageVDC is over 817V. 2 minutes and 50 seconds later after the unit stops, resume.
5120current detecting failureafter compressor has run for 10 seconds, current among U. V. W is below 1.5Arms. 2 minutes and 50 seconds later after the unit stops, resume.
5220radiator sensor failurebefore startup, detect if the sensor is in short circuit or in open circuit. 2 minutes and 50 seconds later after unit stops, resume.
5320current sensor broken downbefore startup, the sensor is in short circuit or in open circuit. 2 minutes and 50 seconds later after unit stops, resume.
5420voltage is too lowdetecting VDC is less than 289V. 2 minutes and 50 seconds later after unit stops, resume.
5520radiator fan broken downSTANDBY state keeps for 10 minutes. 2 minutes and 50 seconds later after unit stops, resume.
5620ACCT faultyin running. H/W of ACCT is faulty. 2 minutes and 50 seconds later after unit stops, resume.
5720DCCT faultyin running. H/W of ACCT is faulty. 2 minutes and 50 seconds later after unit stops, resume.
5820IPM faultyin running. IPM output is faulty. 2 minutes and 50 seconds later after unit stops, resume.
5920VDC faultyin running. H/W of VDC is faulty. 2 minutes and 50 seconds later after unit stops, resume.
6020logic problemwhen startup or running. PWM output is abnormal. 2 minutes and 50 seconds later after unit stops, resume.
6120IPM in short circuit or the earthing is short circuitIPM in short circuit or earthing in short circuitl. 2 minutes and 50 seconds later after unit stops, resume.
6220load is short circuitload in short circuit. 2 minutes and 50 seconds later after unit stops, resume.
6320incorrect wiringACCT wiring is faulty. 2 minutes and 50 seconds later after unit stops, resume.
6420overloadcurrent exceeds the limitation for 10 minutes. 2 minutes and 50 seconds later after unit stops, resume.
6520DCCT sensor detecting abnormalin startup. DCCT current is less than 6.5A 2 minutes and 50 seconds later after unit stops, resume.
6620DCCT sensor broken downbefore startup. DCCT voltage is out of control. 2 minutes and 50 seconds later after unit stops, resume.
6720communication abnormal with fan motor driving boardno communication for 4 minutes
6820DC fan motor driving board IPM alarmsin communication the code byte is 0*20. 2 minutes and 50 seconds later after unit stops, resume. If it occurs 3 times in an hour, confirm the alarm.
6920DC fan motor driving board pressure too high protectionin communication the code byte is 0*04. 2 minutes and 50 seconds later after unit stops, resume. If it occurs 3 times in an hour, confirm the alarm.
7020DC fan motor driving board pressure too low protectionin communication the code byte is 0*08. 2 minutes and 50 seconds later after unit stops, resume. If it occurs 3 times in an hour, confirm the alarm.
7120DC fan motor driving board blockedin communication the code byte is 0*01. 2 minutes and 50 seconds later after unit stops, resume. If it occurs 3 times in an hour, confirm the alarm.
7220DC fan motor driving board EEPROM faultyin communication the code byte is 0*02. 2 minutes and 50 seconds later after unit stops, resume. If it occurs 3 times in an hour, confirm the alarm.
7320DC fan motor driving board detecting out of controlin communication the code byte is 0*10. 2 minutes and 50 seconds later after unit stops, resume. If it occurs 3 times in an hour, confirm the alarm.
7420DC fan motor driving board over current or curent transducer broken downin communication the code byte is 0*40. 2 minutes and 50 seconds later after unit stops, resume. If it occurs 3 times in an hour, confirm the alarm.
7520compressor power cable of inverter board phase sequence is incorrectafter compressor starts up. the high pressure is lower than the low pressure for 1 minute continuously.

Haier HSU18VHK-G Air conditioner error codes

Code indication indoorDescription
E1Room temperature sensor failure
E2Heat-exchange sensor failure
E4Indoor EEPROM error
E14Indoor fan motor malfunction

Haier AC142ACNAC Air conditioner error codes

CodeFlash time of compressor running indicate lampTrouble contents (new)
EO10drainage system trouble
E11indoor temperature sensor broken
E22indoor coil temperature sensor broken
E33outdoor temperature sensor broken
E44outdoor coil temperature sensor broken
E55over current protect limit
E66pressure protect
E77three phase protect
E88Communication trouble between wired remote controller and indoor unit
E99communication trouble between indoor and outdoor unit

 

Error codes and troubleshooting