88
Table 19. Alert Codes and Troubleshooting
Initial notification of critical alerts will pop-up on the home screen and will be listed under notification menu. Minor and moderate alerts are found only under the notification menu. Moderate alerts
are not e-mailed to Homeowners. Dealers will get an email and code can be seen on thermostat under the installer notification section.
NOTE:
Anytime the word
DEVICE
or
DEVICE2
is used in this table, it will be replaced on all alert code notification screens with the actual offending device name, for example, thermostat, heat
pump, etc.).
Alert
Code
Inverter
Flash
Code
Priority
Condition
Applicable
Component
Actual Displayed
Alert Text
Component or System Operational State and Troubleshooting Tip
440
13
Moderate
Variable
capacity
outdoor unit*
OD Inverter
Compressor
Slowdown -
High Heat-Sink
temperature
Compressor slowdown due to high heat sink temperature.
• Heat sink temperature is approaching limit.
• The compressor speed automatically slows to reduce heat sink temperature.
•
The control sets indoor CFM and outdoor RPM to values according to demand percentage rather than the actual Hz.
•
The screws that hold the inverter to the inverter board may be loose causing poor contact between these two components.
•
Tighten screws that hold the heat sink to the inverter control board.
NOTE:
Wait five minutes for all capacitors to discharge before 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.
•
The inverter finned aluminum heat sink is located on the back side 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 obstructions that may impact air flow across the heat sink.
•
The inverter will begin to briefly reduce the compressor speed when 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 “Off ”) notification
can be viewed under the outdoor unit Diagnostics section of the thermostat Dealer Control Center.
•
Inverter LEDs will flash code 13.
•
Refer to the unit service documentation for detailed troubleshooting procedures.
Inverter flash code 13. The sequence is:
• Red LED: One Flash
• Green LED: Three Flashes
Automatically clears when the condition no longer exists.
