Haier GE NS23AM Service Manual page 66

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
Table 20. Outdoor Control 7-Segment Display Alert Codes - Compressor
Priority Actual Displayed
Component or System Operational State and Troubleshooting Tip
Condition Alert Text
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
• 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 Com-
Information pressor Slowdown •
Only-Dealer - High Heat-Sink
temperature
•
•
• Refer to the unit service documentation for detailed troubleshooting
The sequence is:
•
•
NOTE:
Page 66
temperature.
to demand percentage rather than the actual Hz.
causing poor contact between these two components.
checking 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.
of 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
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
the outdoor unit Diagnostics 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.
How to Clear Alert
Code
Automatically clears
when the condition
no longer exists.
31-5000746 Rev. 0