Daikin REYQ8-48PY1B - Troubleshooting (OP: Centralized Remote Controller); M1 PCB Defect

Troubleshooting (OP: Centralized Remote Controller) SiBE37-701_B
371 Troubleshooting
4. Troubleshooting (OP: Centralized Remote
Controller)
4.1
“
M1
”
PCB Defect
Remote
Controller
Display
M1
Applicable
Models
Centralized 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 centralized remote controller PCB

Defect of intelligent Touch Controller PCB

Defect of Schedule timer PCB
Troubleshooting Replace the centralized 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.
Turn ON the power supply of
the centralized controller with
"
M1
" displayed once again.
With "
M1
" displayed
Without "
M1
" displayed
Centralized controller: Normal
It is supposed that the
malfunction results from
external factors (e.g. noises)
from other equipment.