High Pressure Sensor Abnormality - Daikin REYQ-TA Series Service Manual

Troubleshooting by Error Code

3.39 High Pressure Sensor Abnormality

JA
Error Code
Applicable
All outdoor unit models
Models
Method of Error
Detect according to temperature detected with the high pressure sensor.
Detection
Error Decision The high pressure sensor is short circuit or open circuit.
Conditions (Pressure range: 0-4.3 MPa (0-624 psi))
Supposed
Causes
Troubleshooting
CHECK 12
227
Defective high pressure sensor
Connection of low pressure sensor in mistake for high pressure sensor
Defective outdoor unit main PCB
Defective connection of high pressure sensor
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
high pressure service port.
(2) Connect the Service Checker for
VRV systems.
Are the
characteristics
of the high 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 restart
operation.
Are the
characteristics of the
high pressure sensor
normal?
YES
Refer to page 285.
NO
NO
NO
SiUS371614E
Replace the high pressure sensor
(S1NPH).
Replace the outdoor unit main PCB
(A1P).
Replace the high pressure sensor
(S1NPH).
Replace the outdoor unit main PCB
(A1P).
Service Diagnosis