Troubleshooting (Op: Central Remote Controller); Pc Board Defect; M1" Pc Board Defect - Daikin VRV III RXYQ5-54PY1 Service Manual

Si34-601A
4.

Troubleshooting (OP: Central Remote Controller)

"M1"
4.1

PC Board Defect

M1
Remote
Controller
Display
Applicable Central remote controller
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 Replace the central remote controller.
Troubleshooting
Defect of central remote controller PC board
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.
Turn ON the power supply of
the central equipment
with M1 displayed once again.
Is the M1 displayed again?
Without M1 displayed

Troubleshooting (OP: Central Remote Controller)

With M1 displayed
Replace the central
equipment.
Central equipment: Normal
It is supposed that the
malfunction results from
external factors (e.g. noises)
from other equipment.
297