Indoor Unit Pcb Abnormality - Daikin Super Multi NX C-Series Service Manual

SiE12-411
5.3

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
" Faulty indoor unit PCB
Supposed
" Faulty connector connection
Causes
Troubleshooting
Note: Connector Nos. vary depending on models.
Control connector
Wall Mounted Type 20 / 25 / 35 class Terminal strip~Control PCB
Wall Mounted Type 50 / 60 / 71 class Terminal strip~Control PCB
Duct Connected Type
Floor / Ceiling Suspended Dual Type S37
Floor Standing Type
Service Diagnosis
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Connector connection check
(note).
Is it normal?
YES
Model Type
NO
Connector No.
Terminal strip~Control PCB
Control PCB : S7, S201, S203
Power Supply PCB : S8, S202, S204
Troubleshooting
Correct connections.
Replace PCBs.
(R1400)
169