Haier GE NS23AM Service Manual page 38

NOTE: System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/dehumidification). Only the latest
active fault or lockout codes are displayed (if present). If no fault or lockout codes are active, then system status codes are displayed.
GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat
Inverter Flash
Code
Alert Inverter
Code Code
Red Green
LED LED
2 7
431 27
2 8
432 28
Priority Actual Displayed Component or System Operational State
Condition Alert Text and Troubleshooting Tip
The inverter has detected a PFC circuit over-current condition.
• Error occurs when PFC detects an over current condition of 100A peak.
• If condition is detected, outdoor unit will stop (compressor and fan) –
• Anti-short cycle timer is initiated.
• If condition occurs 10 times within 60 consecutive minutes, the system
Service
•
Soon/ OD Inverter PFC
Service Fault • Refer to the unit service documentation for detailed troubleshooting
Urgent
The sequence is:
•
•
NOTE:
The inverter has detected a DC link high voltage condition.
• Error occurs when the DC link capacitor voltage is greater than 480 VDC.
• If condition is detected, outdoor unit will stop (compressor and fan) –
• Anti-short cycle timer is initiated.
• If condition occurs 10 times within 60 consecutive minutes, the system
•
• Refer to the unit service documentation for detailed troubleshooting
The sequence is:
Service
•
Soon/ OD Inverter DC
•
Service Link High Voltage
Urgent
NOTE:
Troubleshooting Suggestions:
•
•
•
•
•
Go to outdoor unit service manual for detail troubleshooting procedures
and require values for testing DC link voltages and various insulation
resistance characteristics.
Table 11. Alert Codes and Troubleshooting
moderate condition.
will lockout – critical condition.
procedures.
Red LED: Two Flashes
Green LED: Seven Flashes
Inverter normal operations with no error code present is as
follows. Red LED is ON and Green LED is OFF.
moderate condition.
will lockout – critical condition.
procedures.
Red LED: Two Flashes
Green LED: Eight Flashes
Inverter normal operations with no error code present is as
follows. Red LED is ON and Green LED is OFF.
Check wire connections (U, V and W) at inverter plug in harness and
compressor.
Check the resistance of compressor windings. If not in range, replace
compressor.
Check compressor to ground. If ground issue, replace compressor.
Check input power (Single Phase - 208/230VAC + 10%. If out of range,
correct main power issue.
Check DC Link voltage and MICOM Sensing voltage. If out of range,
replace inverter. if okay, possible mechanical issue with compressor.
Page 38
How to Clear
Alert Code
To clear, disconnect
power to outdoor unit
and restart.
To clear, disconnect
power to outdoor unit
and restart.
31-5000746 Rev. 0