Daikin VRV II-Q RQYQ8-48PY1B Service Manual page 185

SiBE341027
Troubleshooting
Service Diagnosis
A
Check the transmission wiring
between centralized controllers
for any broken wire.
For details, refer to information
in the "Procedure for checking
broken wires" section.
Normal
Check the transmission wiring
between master centralized
controller for any broken wire. For
details, refer to information in the
"Procedure for checking broken
wires" section.
Normal
Has the main
centralized controller
setting connector been
connected?
YES
Disconnect the transmission
wiring of the main centralized
controller, and then check the
voltage between the
transmission terminals (F1 and
F2) of the master unit
transmission equipment using
a tester.
Is the voltage
between the
terminals F1 (+) and
F2 (-) in the range of
15.2 to 17.6 VDC?
YES
Abnormal
Abnormal
NO
NO
Troubleshooting by Remote Controller
Correct the wiring.
Correct the wiring.
Correct the connection of the
connector.
Replace the centralized
controller.
Centralized controller: Normal
It is supposed that the error
results from external factors
(e.g. noises) from other
equipment.
175