LG Therma V ZHBW056A0 Service Manual page 103

Air-to-water heat pump

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Title

code

RST Reverse Phase

Detection Error

n Error diagnosis and countermeasure flow chart

Items for checking

Installation

Fuse damage

(R and S phases)

Inverter PCB

Cause of error

Prevention of phase unbal-

ance and prevention of

reverse rotation of con-

stant-rate compressor

Sub-items for checking

Checking N-phase

※ Refer to 3.17.1

Checking for open

and reverse phase

※ Refer to 3.17.3

AC load

- 103 -

Check point & Normal condition

Main power wiring fault

Checking for power

phase loss

※ Refer to 3.17.2

Only training and service purposes.

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