Page 42
31-5000751 Rev. 0
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
Alert
Code
Inverter
Code
Inverter Flash
Code
Priority
Condition
Actual Displayed
Alert Text
Component or System Operational State
and Troubleshooting Tip
How to Clear
Alert Code
Red
LED
Green
LED
441
14
1 flash
4
flashes
Information
Only-Dealer
OD Inverter
Compressor
Slowdown - High
Compressor
Current
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,
it will limit the ramp rate. Instead of changing compressor speed at 1 hz/
second, it changes to 5 hz/20 seconds.
•
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
controls the compressor to operate within design parameters. Alert code
441 typically occurs at startup as the compressor current increases
rapidly during startup.
•
The inverter will reduce the compressor speed by 4 Hz and slow the
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
code 441 notification does not require any additional service or diagnostic
procedures.
•
The control sets indoor CFM and outdoor RPM to values according to
demand percentage rather than the actual Hz.
•
Possible issue is system running at high pressures.
•
Check for high pressure trips or other alert codes in thermostat and
outdoor control.
•
Inverter LEDs will flash code 14.
•
Refer to the unit service documentation for detailed troubleshooting
procedures.
Inverter flash code 14.
The sequence is:
•
Red LED: One Flash
•
Green LED: Four Flashes
NOTE:
Inverter normal operations with no error code present is as
follows. Red LED is ON and green LED is OFF.
Automatically clears
when the condition
no longer exists.
442
Service
Urgent
OD Compressor
Top Cap Switch
Strikes Lockout
The top cap switch has opened five times within one hour. As a result, the
outdoor unit is locked out.
•
This condition occurs when compressor thermal protection sensor opens
five times within one hour.
•
Outdoor unit will stop.
To clear, disconnect
power to outdoor unit
and restart.
443
Service
Urgent
OD MUC Unit
Code To Inverter
Model Mismatch
The GE Appliances variable capacity unitary control (outdoor control) has
incorrect appliance unit size code selected.
•
Check for proper configuring under unit size code used for outdoor unit
(see unit configuration guide or in installation instructions).
•
If replacing inverter, verify inverter model matches unit size.
•
Remove the thermostat from the system while applying power and
reprogramming.
Automatically clears
after the correct
match is detected
following a power
reset.
600
Information
Only-Dealer Load Shed Event
Compressor has been cycled OFF on utility load shedding.
•
Load shedding function provides a method for a local utility company to
limit the maximum power level usage of the outdoor unit.
•
The feature is activated by applying 24VAC power across the
L
and
C
terminals on the outdoor control
Automatically clears
when L terminal is
inactive.
601
Information
Only-Dealer
OD Unit Low
Ambient
Operational
Lockout
•
Outdoor unit has been cycled off on low temperature protection.
•
Outdoor unit will not operate when the outdoor ambient is at or below
4°F (-15.6°C).
•
If the unit is satisfying a demand (running) and the outdoor ambient drops
below 4°F (-15.6°C), the unit will continue to operate until the demand
has been satisfied or the outdoor ambient drops to 15°F (-9.4°C) which
will result in the unit being locked out (shut down).
Automatically
clears when low
temperature
condition no longer
exists.
Table 12. Alert Codes and Troubleshooting