Haier GE NS23AM Service Manual page 44

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
4
441 14
442
443
600
601
Priority Actual Displayed Component or System Operational State
Condition Alert Text and Troubleshooting Tip
This alert code is for more information than an issue with the system.
• When the inverter gets close to the current or heat sink temperature limit,
• Compressor slowdown due to high compressor current.
• Compressor current is approaching limit.
• The compressor speed automatically slows.
• This error code is primarily for informational purposes as the inverter
• The inverter will reduce the compressor speed by 4 Hz and slow the
OD Inverter
Compressor
Information
Slowdown - High
Only-Dealer
Compressor
• The control sets indoor CFM and outdoor RPM to values according to
Current
• Possible issue is system running at high pressures.
• Check for high pressure trips or other alert codes in thermostat and
•
• Refer to the unit service documentation for detailed troubleshooting
The sequence is:
•
•
NOTE:
outdoor unit is locked out.
OD Compressor
Service
• This condition occurs when compressor thermal protection sensor opens
Top Cap Switch
Urgent
Strikes Lockout
• Outdoor unit will stop.
The GEA variable capacity unitary control (outdoor control) has incorrect
appliance unit size code selected.
•
OD MUC Unit
Service
Code To Inverter
Urgent
Model Mismatch
• If replacing inverter, verify inverter model matches unit size.
• Remove the thermostat from the system while applying power and
Compressor has been cycled OFF on utility load shedding.
• Load shedding function provides a method for a local utility company to
Information
Load Shed Event
Only-Dealer
• The feature is activated by applying 24VAC power across the L and C
•
• Outdoor unit will not operate when the outdoor ambient is at or below
OD Unit Low
Information Ambient
Only-Dealer Operational • If the unit is satisfying a demand (running) and the outdoor ambient drops
Lockout
Table 11. Alert Codes and Troubleshooting
it will limit the ramp rate. Instead of changing compressor speed at 1 hz/
second, it changes to 5 hz/20 seconds.
controls the compressor to operate within design parameters. Alert code
441 typically occurs at startup as the compressor current increases
rapidly during startup.
compressor ramp up speed to the requested compressor demand
speed (capacity). This is normal and expected operation of the inverter
to control the inverter within design parameters. In most cases the alert
procedures.
demand percentage rather than the actual Hz.
outdoor control.
procedures.
Red LED: One Flash
Green LED: Four Flashes
Inverter normal operations with no error code present is as
follows. Red LED is ON and green LED is OFF.
reprogramming.
limit the maximum power level usage of the outdoor unit.
terminals on the outdoor control
4°F (-15.6°C).
below 4°F (-15.6°C), the unit will continue to operate until the demand
will result in the unit being locked out (shut down).
Page 44
How to Clear
Alert Code
Automatically clears
when the condition
no longer exists.
To clear, disconnect
power to outdoor unit
and restart.
Automatically clears
after the correct
match is detected
following a power
reset.
Automatically clears
when L terminal is
inactive.
Automatically
clears when low
temperature
condition no longer
exists.
31-5000746 Rev. 0