Trouble Diagnosis By Error Monitor Lamps - Sanyo CMH1972 Technical & Service Manual

Dc inverter multi-system air conditioner outdoor unit
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8-2. Trouble Diagnosis by Error Monitor Lamps

WARNING
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.
Error Monitor Lamp
ERR0
ERR1
To prevent electric shock, do not inspect or repair until
the Power Lamp on the P.C.Board is turned off.
Heat Exchanger
Rear side
ERR0
ERR1
ERR2
ERR3
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
P.C.Board of Electrical Component Box.
Front side
Fig.1 View from top
Error Contents
54
Error Monitor Lamps
Power Lamp
: ON
: OFF

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