Indoor Unit Pcb Abnormality - Daikin G-Series Service Manual

Troubleshooting
4.2

Indoor Unit PCB Abnormality

A1
Remote
Controller
Display
Method of Evaluation of zero-cross detection of power supply by indoor unit.
Malfunction
Detection
Malfunction When there is no zero-cross detection in approximately 10 continuous seconds.
Decision
Conditions
Supposed
Causes
Troubleshooting
Note: Connector Nos. vary depending on models.
Wall Mounted Type
Duct Connected Type
Floor / Ceiling Suspended Dual Type S37
Floor Standing Type
174
Faulty indoor unit PCB
Faulty connector connection
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Connector connection check
Is it normal?
YES
Model Type
NO
Connector
Terminal strip~Control PCB
Terminal strip~Control PCB
Terminal strip~Control PCB
SiBE12-933_A
Correct connections.
Replace PCBs.
(R7130)
Service Diagnosis