Lennox iComfort S30 Installation And Setup Manual page 65

Table 1 Alert Codes and Troubleshooting
Applicable
Alert Priority
System
Code Condition
Component(s)
Moderate /
Inverter Controlled
436
Outdoor unit
Critical
Moderate / Inverter Controlled
437
Outdoor unit
Critical
Moderate / Inverter Controlled
438
Outdoor unit
Critical
Critical alerts are displayed on the Home screen, in the Homeowner alert button, and in the Installer alert button.
Minor and moderate alerts are found only in the Installer alert button.
Actual Displayed Alert
Component or System Operational State and Troubleshooting Tip
Text
Inverter heat sink temperature exceeded limit
√ This occurs when the heat sink temperature exceeds the inverter limit. In­
verter will issue inverter alert code 13 first and slow down to try to cool the
heat sink.
√ If temperature remains high, outdoor unit will stop both compressor and fan
– moderate condition.
√ Anti­short cycle is initiated.
√ If condition occurs five times within an hour, system will lockout – critical
OD Inverter High
condition.
Heat-Sink Temperature
√ The screws that hold the inverter to the inverter board were 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.
√ Inverter LEDs will blink code 62.
√ Refer to the unit service documentation for detailed troubleshooting proce­
dures.
Heat sink temperature sensor fault has occurred (temperature less than 4ºF
or greater than 264ºF after 10 minutes of operation)
√ When the temperature sensor detects a temperature less than 4ºF or
greater than 264ºF after 10 minutes of operation.
√ Outdoor unit will stop both compressor and fan – moderate condition.
OD Inverter Heat-Sink
√ Anti­short cycle is initiated.
temp Sensor Fault
√ If condition occurs five times within an hour, system will lockout – critical
condition.
√ Inverter LEDs will blink code 65.
√ Refer to the unit service documentation for detailed troubleshooting proce­
dures.
The inverter has detected a PFC circuit over-current condition
√ The inverter has detected a power factor correction (PFC) over current
condition. This may be caused by a high load condition, high pressure, or
outdoor fan failure.
√ Outdoor control will display the code when the inverter has detected the er­
ror – moderate condition.
√ After three minutes, the inverter will reset and the compressor will resume
operation.
OD Inverter PFC Input
√ If the error condition occurs 10 times within a 60 minute rolling time period,
Overcurrent
the outdoor unit control will lock out operation of the outdoor unit – critical
condition.
√ Possible issue is system running at high pressures.
√ Check for high pressure trips or other alert codes in iComfort
door control.
√ Inverter LEDs will blink code 73.
√ Refer to the unit service documentation for detailed troubleshooting proce­
dures.
.
.
65
How to clear alert code
Moderate condition will automati­
cally clear when the inverter sends
an alarm clear message.
Critical condition is cleared by dis­
connecting power to the outdoor
unit and restart.
Moderate priority condition will au­
tomatically clear when the inverter
sends an alarm clear message.
Critical priority condition can be
cleared by disconnecting and re­
connecting power to outdoor unit
to restart.
.
Moderate priority condition is auto­
matically cleared when the inverter
sends a clear message.
Critical priority condition will auto­
matically clear when inverter is
power cycled.
®
S30 and out­