Si20-701_B Troubleshooting by Remote Controller
400
Remote Controller Display
U4
Applicable Models
RZQG
Method of Error Detection
The error is generated when the micro-processor detects
that the transmission between the indoor and the outdoor
unit is not normal over a certain amount of time.
Error Decision Conditions
When the transmission is not carried out normally over a
certain amount of time
Supposed Causes
Wiring indoor-outdoor transmission wire is incorrect
Defective indoor unit PCB
Defective outdoor unit PCB
Burning out fuse
Defective outdoor unit fan motor
External factor (Noise, etc.)
Defective power supply
Disconnection of optional equipments
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