Repair Section
46
: LED turn on
*1 Shown with the operational status display mode.
When the fan is under the initial settings or in test mode, either the WMC or MWT will be
inoperative, and no self-diagnostic codes will be displayed.
• Verify self-diagnostic codes using the LED on the relay board.
• To erase self-diagnostic codes, (including either the WMC or MWT), open and close the circuit
breaker.
Self-Diagnostic
Code
Cause
Alarm
Pattern
Relay Board
LED (Red)
Warning
Signal
Output
Detection Contents
1 2 3 4 5 6
DF
*1
Freezing abnormality -
OFF
When the evaporator pipe
inlet thermistor temperature
at or below 26.5°F (-3°C) is
detected during compressor
operation.
However, detection is not
possible for 5 minutes after
the compressor starts.
IR
*1
Evaporator fan motor
reverse rotation
abnormality
-
When a fan motor reverse
rotation signal (-760 rpm) is
detected.
OR
*1
Condenser fan motor
reverse rotation
abnormality
-
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