Pc Board Defect; M1" Pc Board Defect - Daikin VRV - WII Service Manual

SiUS30-604
"M1"
4.2

PC Board Defect

M1
Remote
Controller
Display
Applicable Schedule timer
Models
Method of Detect an abnormality in the DIII-NET polarity circuit.
Malfunction
Detection
Malfunction When + polarity and - polarity are detected at the same time.
Decision
Conditions
Supposed
Causes
Troubleshooting
Troubleshooting
Defect of schedule timer PC board
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Reset power supply.
Does the
system return to normal?
NO
Troubleshooting (OP: Schedule Timer)
YES
External factor other
than equipment
malfunction (noise etc.)
Replace the indoor unit
PC board.
(V2837)
237