Transmission Error (Between Indoor And Outdoor Units) - Daikin VRV II-Q RQYQ8-48PY1B Service Manual

Troubleshooting by Remote Controller

2.33 Transmission Error (between Indoor and Outdoor Units)

U4
Remote
Controller
Display
Applicable All indoor unit models
Models RQYQ-PY1B
Method of Error The error is generated when the micro-computer detects that the transmission between the
indoor and outdoor unit is not normal.
Detection
Error Decision When transmission is not carried out normally for a certain amount of time
Conditions
Supposed
Causes
156
Indoor to outdoor, outdoor to outdoor transmission wiring F1, F2 disconnection, short circuit
or wrong wiring
Outdoor unit power supply is OFF
System address does not match
Defective outdoor unit main PCB (A1P)
Defective indoor unit PCB
SiBE341027
Service Diagnosis