High Pressure Sensor Abnormality - Daikin RXQ12AHR Service Manual

Troubleshooting by Error Code

5.34 High Pressure Sensor Abnormality

Applicable All outdoor unit models
Models
JA
Error Code
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)
Supposed
 Defective high pressure sensor
Causes  Connection of low pressure sensor in mistake for high pressure sensor
 Defective outdoor unit main PCB
 Defective connection of high pressure sensor
Troubleshooting
Reference
CHECK 12 Refer to page 298.
238
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 outdoor
unit main 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 it.
Are the
characteristics of the high
pressure sensor normal?
YES
NO
NO
NO
SiAF341904E
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).
Part 6 Service Diagnosis