Daikin RXYQ-TA Series Service Manual page 253

SiUS341615E
Troubleshooting
CHECK 12
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
(1)Mount a pressure gauge on the
low pressure service port.
(2)Connect the Service Checker for
VRV systems.
Are the
characteristics of
the low pressure sensor
normal? (Make a comparison
between voltage characteristics and
gauge pressure.)
CHECK 12
YES
Is the PCB
detection pressure
normal? Make a comparison
between data on pressure checked
by the Service Checker and the voltage
characteristics.
CHECK 12
YES
Reset the operation, and then
restart the operation.
Are the
characteristics of the
low pressure sensor
normal?
YES
Refer to page 302.
NO
NO
NO
Troubleshooting by Error Code
Replace the low pressure sensor
(S1NPL).
Replace the outdoor unit main PCB
(A1P).
Replace the low pressure sensor
(S1NPL).
Replace the outdoor unit main PCB
(A1P).
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