8-2. Trouble Diagnosis by Error Monitor Lamps

Warning

To prevent electric shock, do not inspect or repair until the Power Lamp on the P.C.Board is turned off.

8-2-1. Location of the Error Monitor Lamps

Remove the top plate of outdoor unit and the cover of Electrical Component Box.

The Power Lamp and Error Monitor Lamps are located on the P.C.Board of Electrical Component Box. (Fig.1)

Heat Exchanger

Rear side

P.C.Board of Electrical Component Box.

 

 

 

Error Monitor Lamps

 

 

 

Power Lamp

 

ERR0

Front side

 

 

ERR1

 

 

 

 

 

ERR2

Fig.1 View from top

 

 

ERR3

 

8-2-2. Display of the Error Monitor Lamps

If a protective device has activated or there is a sensor failure in the outdoor unit, the 4 error monitor lamps on the outdoor control circuit board will indicate the nature of the trouble.

: ON : OFF

Error Monitor Lamp

Error Contents

ERR0 ERR1 ERR2 ERR3

Sensor for compressor discharge temp

Sensor for heat excharge temp

Sensor for branch pipe A (Narrow tube)

Sensor for branch pipe B (Narrow tube)

Sensor for branch pipe C (Narrow tube)

Sensor for branch pipe D (Narrow tube)

Outdoor temp sensor

Sensor for branch pipe A (Wide tube)

Sensor for branch pipe B (Wide tube)

Sensor for branch pipe C (Wide tube)

Sensor for branch pipe D (Wide tube)

HIC circuit trouble (current, temp)

Actuation of comp over load relay

Actuation of freeze protection function

Outdoor unit error. Detail of error message indicate on indoor LED

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Panasonic CU-4KE31NBU, CU-4KE24NBU Trouble Diagnosis by Error Monitor Lamps, Location of the Error Monitor Lamps

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