Daikin VRV III REYQ10PY1B, Service Manual

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Troubleshooting (OP: Central Remote Controller) SiBE37-701
358 Troubleshooting
4. Troubleshooting (OP: Central Remote Controller)
4.1
“
M1
”
PC Board Defect
Remote
Controller
Display
M1
Applicable
Models Central remote controller Intelligent Touch Controller
Schedule timer
Method of
Malfunction
Detection Detect an abnormality in the DIII-NET polarity circuit.
Malfunction
Decision
Conditions When + polarity and - polarity are detected at the same time.
Supposed
Causes
„
Defect of central remote controller PC board
„
Defect of Intelligent Touch Controller PC board
„
Defect of Schedule timer PC board
Troubleshooting Replace the central remote controller.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Is the
M1
displayed
again?
Replace the central
equipment.
Central equipment: Normal
It is supposed that the
malfunction results from
external factors (e.g. noises)
from other equipment.
With "
M1
" displayed
Turn ON the power supply of
the central equipment
with "
M1
" displayed once again.
Without "
M1
" displayed