Daikin 2MXU40GV1B User Manual

Troubleshooting SiBE12-908
127 Service Diagnosis
2.12 Signal Transmission Error (Indoor Unit - Outdoor Unit)
Remote
Controller Display
U4
Method of
Malfunction
Detection
The data sent from the outdoor unit is checked for problem.
Malfunction
Decision
Conditions
When the data sent from the outdoor unit can not be received without error, or when the disable
status of signal transmission continues for 15 seconds.
Supposed
Causes

Defective outdoor unit PCB

Defective indoor unit PCB

Signal transmission error between indoor and outdoor unit due to improper wiring

Signal transmission error between indoor and outdoor unit due to breakage of relay wire
(transmission wire)

Daikin 2MXU40GV1B Specifications

General

Brand	Daikin
Model	2MXU40GV1B
Category	Heat Pump
Language	English