Haier GE NS23AM Service Manual page 83

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 3
429 23
2 6
430 26
Table 27. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes
31-5000746 Rev. 0
Priority Actual Displayed
Condition Alert Text
Service Soon/
OD Inverter DC
Service
Link Low Voltage
Urgent
Service Soon/ OD Inverter
Service Compressor
Urgent Startup Fail
Component or System Operational State and Troubleshooting
Tip
The inverter has detected a DC link low voltage condition.
• On a call for compressor operation, if DC link power in inverter
does not rise above 180 VDC for 2- and 3-ton models, 250 VDC
for 4- and 5-ton models within 30 seconds, the control will display
a moderate code.
• If condition is detected, outdoor unit will stop (compressor and fan)
– moderate condition.
• An anti-short cycle timer is initiated. If condition occurs 10 times
within a 60 consecutive minutes, system will lock out and display
alert code 429 – critical condition.
• The outdoor control anti-short cycle timer will time out and the unit
will recycle the demand.
•
• Refer to the unit service documentation for detailed troubleshooting
procedures. Perform test function and verify inverter DC link and
reactor before replacing inverter board.
The sequence is:
• Red LED: Two Flashes
• Green LED: Three 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.
Compressor start-up failure.
• If condition is detected, outdoor unit will stop (compressor and fan)
– moderate condition.
• Anti-short cycle 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: Six Flashes
NOTE: Inverter normal operations with no error code present is as
follows. Red LED is ON and Green LED is OFF.
• Check refrigerant
• Replace outdoor control board
• Replace inverter.
Page 83
How to Clear Alert
Code
Automatically clears
when the system
detects that the issue
no longer exists.
To clear, disconnect
power to outdoor unit
and restart.