Daikin VRV III REYQ8PY1, Service Manual

Page: 348 / 452

Si37-701 Troubleshooting (OP: Central Remote Controller)
Troubleshooting 337
4.2
“
M8
”
Malfunction of Transmission between Optional
Controllers for Centralized Control
Remote
Controller
Display
M8
Applicable
Models Central 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 PC board 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.
YES
Turn ON the power supply of
the central equipment.
Replace Ve-Up controller.
Set the Reset switch (located
inside of equipment)
SS1 been set to the Normal
side.
Replace the central
equipment.
Correct the wiring.
Some central equipment gets
faulty. Conduct RUN/STOP
operations on every central
equipment, and then replace
the central equipment that
cannot control the indoor unit.
NO
Have power
supplies to every central
equipment been
turned ON?
Is the display of LCD OK?
NO
YES
Nothing is
displayed on the LCD by operating
Ve-Up controller.
(
∗
1)
NO
Has the Reset
switch (located inside of
equipment) SS1 been set
to the Normal
side?
Reset the power supplies of
every central equipment.
YES
Abnormal
Were
any changes
made to the number
of units of central
equipment? (The central
equipment was connected once,
and then disconnected, or
additional central
equipment was
installed.)
NO
YES
Normal
NO
YES
Check 7
Check if the unit indicating
“A8” has no broken
of wiring.
∗
1: Display screen control using Ve-Up controller:
When the screen displays nothing by touching the screen, adjust the contrast volume.
Check 7
: Referring to the information on P352.
∗
2
∗
2