Haier GE NS18HM Service Manual page 33

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
416
422
4
423 40 OFF
flashes
424
426
31-5000751 Rev. 0
Priority Actual Displayed Component or System Operational State
Condition Alert Text and Troubleshooting Tip
The outdoor coil sensor is either open, short-circuited or the temperature is
out of sensor range.
• Outdoor unit control will not perform demand or time / temperature
• This fault is detected by allowing the unit to run for 90 seconds before
Service OD Coil Sensor
Soon Faulty
• Advances from moderate to critical after ten (10) minutes.
• Plug-in sensor harness correctly.
• Check resistance of sensor to determine if it is open, shorted, out of
Compressor top cap switch exceeding thermal limit.
• Check condenser fan motor, TXV and indoor unit blower motor.
• Check for stuck reversing valve or clogged refrigerant filter.
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
• Inverter LEDs will flash code 40
Service
• Refer to the unit service documentation for troubleshooting procedures.
Soon/ OD Inverter CT
Service Circuit Fault
Inverter flash code 40:
Urgent
The sequence is:
Red LED: Four Flashes
Green LED: Off
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.
• At the beginning of (any) configuration, furnace or air handler control will
• 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
Inverter will flash codes 12 to 14 and 53.
Urgent Inverter Alarms
NOTE:
Table 12. Alert Codes and Troubleshooting
defrost operation. (System will still heat or cool.)
checking sensor resistance. If the sensor resistance is not within range
after 90 seconds, the control will display a moderate code.
temperature calibration or out of ambient temperature range. Replace if
out-of-specifications.
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 33
How to Clear
Alert Code
Automatically clears
when outdoor unit
control detects
proper sensor
readings.
If sensor is faulty
and the system
is reporting the
condition as critical,
replaced sensor.
Reset power 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
upon configuration,
or sensing normal
values.
To clear disconnect
power to outdoor
control and restart.