Troubleshooting For Ra Indoor Unit; Indoor Unit Pcb Abnormality - Daikin 4MXS-R Series Service Manual

Troubleshooting for RA Indoor Unit

5. Troubleshooting for RA Indoor Unit

5.1

Indoor Unit PCB Abnormality

A1
Error Code
Method of Error The system checks if the circuit works properly within the microcomputer of the indoor unit.
Detection
Error Decision
The system cannot set the internal settings.
Conditions
Supposed
Causes
151
Wrong models interconnected
Defective indoor unit PCB
Disconnection of connector
Reduction of power supply voltage
SiUS121736EA
Service Diagnosis