Repair Section
50
*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 inoperable,
and no self-diagnostic codes will be displayed.
Alarm (buzzer) patterns
Self-Diagnostic
Code
Possible Cause
Alarm
Pattern
Relay Board
LED (Red turns on)
Warning
Signal
Output
Detection Contents
1 2 3 4 5 6
DF
*1
Freezing abnormality - OFF
When an evaporator
refrigerant 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.
I003173
Pattern 1
Pattern 2
Pattern 3
Pattern 4
ON
OFF
ON
OFF
ON
OFF
ON
OFF
0.5 sec
4 sec
1 sec
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