Daikin REYQ8-48PY1B, Service Manual

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SiBE37-701_B Troubleshooting (OP: Centralized Remote Controller)
Troubleshooting 372
4.2
“
M8
”
Malfunction of Transmission between Optional
Controllers for Centralized Control
Remote
Controller
Display
M8
Applicable
Models Centralized remote controller intelligent Touch Controller
Schedule timer
Method of
Malfunction
Detection Detect the malfunction according to DIII-NET transmission data. (The system will be
automatically reset.)
Malfunction
Decision
Conditions When no master controller is present at the time of the startup of slave controller.
When the centralized controller, which was connected once, shows no response.
Supposed
Causes
„
Malfunction of transmission between optional controllers for centralized control
„
Defect of PCB of optional controllers for centralized control
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
NO
Were any changes made to the number of
units of centralized controller? (The central
equipment was connected once, and then
disconnected, or additional centralized
controller was installed.)
Reset the power supplies of
every centralized controller.
YES
NO
YES
NO
YES
YES
NO
NO
YES
Normal
Abnormal
Have power supplies to
every centralized controller
been turned ON?
Is the display of LCD
OK?
Check 7
Check if the unit indicating
“
A8
” has no broken of
wiring.
∗
2
Nothing is displayed on the
LCD by operating intelligent
Touch Controller. (*1)
Has the Reset switch
(located inside of equipment)
SS1 been set to the Normal
side?
Turn ON the power supply of
the centralized controller.
Replace the intelligent Touch
Controller.
Set the Reset switch (located
inside of equipment)
SS1 been set to the Normal
side.
Replace the centralized
controller.
Correct the wiring.
Some centralized controller
gets faulty. Conduct ON/OFF
operations on every
centralized controller, and then
replace the centralized
controller that cannot control
the indoor unit.
∗
1: Display screen control using intelligent Touch Controller:
When the screen displays nothing by touching the screen, adjust the contrast volume.
∗
2: Check 7 : Referring to the information on P387.
Check 7
Check 7