Haier GE NS23AM Service Manual page 43

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
3
440 13
31-5000746 Rev. 0
Priority Actual Displayed Component or System Operational State
Condition Alert Text and Troubleshooting Tip
Compressor slowdown due to high heat sink temperature.
• Heat sink temperature is approaching limit.
• The compressor speed automatically slows to reduce heat sink
• The control sets indoor CFM and outdoor RPM to values according to
• The screws that hold the inverter to the inverter board may be loose
• Tighten screws that hold the heat sink to the inverter control board.
NOTE:
•
OD Inverter
Compressor
Information
•
Slowdown -
Only-Dealer
High Heat-Sink
temperature
•
•
• Refer to the unit service documentation for detailed troubleshooting
The sequence is:
•
•
NOTE:
Table 11. Alert Codes and Troubleshooting
temperature.
demand percentage rather than the actual Hz.
causing poor contact between these two components.
screws.
This error code is primarily for informational purposes as the inverter
controls the compressor speed to operate within design parameters.
Typically the inverter will make a minor speed reduction of 4 Hz
(approximately a 5-6% speed reduction) for a brief period of time
and to reduce the heat sink temperature and will then resume normal
operation. This may occur at high outdoor temperatures (above 110ºF)
for brief periods of time (3 – 4 minutes) and is normal and expected
operation of the inverter controlling the compressor safely within design
parameters.
the inverter in the condenser air stream. If the alert code 440 occur
frequently, especially at lower outdoor temperatures, check the heat
sink for debris that may reduce heat transfer or possible obstructions
the heat sink temperature rises above 185ºF and will allow the inverter
to resume the requested compressor demand speed once the inverter
heat sink reaches 176ºF. The heat sink temperature, compressor speed
in Hertz & the Inverter Compressor Speed Reduction status ("On" or
section of the thermostat dealer control center.
procedures.
Red LED: One Flash
Green LED: Three Flashes
Inverter normal operations with no error code present is as
follows. Red LED is ON and green LED is OFF.
Page 43
How to Clear
Alert Code
Automatically clears
when the condition
no longer exists.