SiAF332111E Troubleshooting by Error Code
Part 6 Service Diagnosis 263
5.39 High Pressure Sensor Abnormality
Applicable
Models
All outdoor unit models
Error Code JA
Method of Error
Detection
Detect according to temperature detected with the high pressure sensor.
Error Decision
Conditions
The high pressure sensor is short circuit or open circuit.
(Pressure range: 0-4.3 MPa)
Supposed
Causes
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
Troubleshooting
CHECK 12 Refer to page 353.
Are the
characteristics of the
high pressure sensor
normal? (Make a comparison
between voltage characteristics
and gauge pressure.)
Replace the high pressure sensor
(S1NPH).
Replace the outdoor unit main
PCB (A1P).
NO
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.
Replace the outdoor unit main
PCB (A1P).
NO
Are the
characteristics of the high
pressure sensor normal?
Replace the high pressure sensor
(S1NPH).
NO
YES
YES
YES
Reset the operation, and then
restart it.
(1) Mount a pressure gauge on the
high pressure service port.
(2) Connect the Service Checker for
VRV systems.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
CHECK 12
CHECK 12
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