Daikin VRV S RXQ4/5ARV1, Service Manual, Page: 333 / 377

SiAF332111E Troubleshooting by Error Code
Part 6 Service Diagnosis 327
5.69 Defective PCB
Applicable
Models
Centralized controller
intelligent Touch Controller
Schedule timer
Error Code
M1
Method of Error
Detection
DIII-NET polarity circuit defective conditions are used to detect the error.
Error Decision
Conditions
The test detects both positive polarity and negative polarity.
Supposed
Causes
 Defective centralized controller PCB
 Defective intelligent touch controller PCB
 Defective schedule timer PCB
Troubleshooting
YES
NO
Is M1 displayed again?
Replace the
centralized controller.
Centralized controller is
normal.
Possibly caused by
external factors (such as
interference) related to
other equipment.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Reconnect the power of
centralized controller
displaying
M1 .