Panasonic cu-4ks24nbu User Manual

8-2. Trouble Diagnosis by Error Monitor Lamps

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)

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.

Heat Exchanger

Rear side

P.C.Board of Electrical Component Box.

Error Monitor Lamps

Front side

Fig.1 View from top

ERR0
ERR1
ERR2
ERR3

Power Lamp

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)

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

Outdoor temp sensor

: ON

: OFF

To prevent electric shock, do not inspect or repair until the Power Lamp on

the P.C.Board is turned off.

Warning