Defective Pcb - Daikin VRV S RXQ4/5ARV1 Service Manual

SiAF332111E

5.69 Defective PCB

Applicable Centralized controller
Models intelligent Touch Controller
Schedule timer
M1
Error Code
Method of Error
DIII-NET polarity circuit defective conditions are used to detect the error.
Detection
Error Decision
The test detects both positive polarity and negative polarity.
Conditions
Supposed  Defective centralized controller PCB
Causes  Defective intelligent touch controller PCB
 Defective schedule timer PCB
Troubleshooting
Part 6 Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Reconnect the power of
centralized controller
displaying M1.
Is M1 displayed again?
NO
Troubleshooting by Error Code
YES
Replace the
centralized controller.
Centralized controller is
normal.
Possibly caused by
external factors (such as
interference) related to
other equipment.
327