Haier GE NS23AM Service Manual page 35

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
422
4
423 40 OFF
424
426
31-5000746 Rev. 0
Priority Actual Displayed Component or System Operational State
Condition Alert Text and Troubleshooting Tip
Compressor top cap switch exceeding thermal limit.
• Check condenser fan motor, TXV and indoor unit blower motor.
•
OD Compressor
Service
Top Cap Switch
• Check to ensure that one of the wires from the top cap switch has not
Soon
Open
• Check superheat and sub-cooling.
The inverter has detected a circuit issue.
• When this condition is detected the outdoor control will stop outdoor unit
• Outdoor control will lockout unit after 10 strikes within an hour – critical
•
Service
• Refer to the unit service documentation for troubleshooting procedures.
Soon/ OD Inverter CT
Service Circuit Fault
Urgent
The sequence is:
Red LED: Four Flashes
NOTE:
The liquid line temperature sensor has malfunctioned.
• In normal operation after outdoor control recognizes sensors, the alert
• Compare liquid line sensor resistance to temperature / resistance charts
Service OD Liquid Line
Soon Sensor Faulty
• Replace sensor pack if necessary.
•
• If detected (reading in range), appropriate feature will be set as 'installed'
After 10 faults within 60 consecutive minutes, the control will lockout.
Service OD Excessive
Urgent Inverter Alarms
NOTE:
Table 11. Alert Codes and Troubleshooting
been disconnected from one of the TP terminals on the outdoor control.
Reconnect wire if disconnected.
operations and start the anti-short cycle timer – moderate condition.
condition.
Inverter normal operations with no error code present is as
follows. Red LED is ON and Green LED is OFF.
code will be sent if a valid temperature reading is lost.
in unit installation instructions.
detect the presence of the sensor(s).
and shown in the thermostat 'About' screen.
These inverter codes do not count towards this lockout condition.
Page 35
How to Clear
Alert Code
Automatically
clears when error is
corrected.
A moderate alert
code will clear
automatically when
the inverter detects
the condition no
longer exist and will
send a clear alert
code message.
To clear critical alert
code disconnect
power to outdoor unit
and restart.
Automatically clears
or sensing normal
values.
To clear disconnect
power to outdoor
control and restart.