Haier GE NS23AM Service Manual page 84

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
Table 27. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes
Priority Actual Displayed
Condition Alert Text
Service Soon/
OD Inverter PFC
Service
Fault
Urgent
Service Soon/
OD Inverter DC
Service
Link High Voltage
Urgent
Component or System Operational State 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)
– moderate condition.
• Anti-short cycle timer is initiated.
• If condition occurs 10 times within 60 consecutive minutes, the
system will lockout – critical condition.
•
• Refer to the unit service documentation for detailed troubleshooting
procedures.
The sequence is:
• Red LED: Two Flashes
• Green LED: Seven Flashes
NOTE: Inverter normal operations with no error code present is as
follows. Red LED is ON and Green LED is OFF.
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)
– moderate condition.
• Anti-short cycle timer is initiated.
• If condition occurs 10 times within 60 consecutive minutes, the
system will lockout – critical condition.
•
• Refer to the unit service documentation for detailed troubleshooting
procedures.
The sequence is:
• Red LED: Two Flashes
• Green LED: Eight Flashes
NOTE: Inverter normal operations with no error code present is as
follows. Red LED is ON and Green LED is OFF.
Troubleshooting Suggestions:
• 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.
Go to outdoor unit service manual for detail troubleshooting
procedures and require values for testing DC link voltages and
various insulation resistance characteristics.
Page 84
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