High Pressure Sensor Abnormality - Daikin VRV EMERION REYQ-AATJA Service Manual

Troubleshooting by Error Code

3.52 High Pressure Sensor Abnormality

Applicable
All outdoor unit models
Models
JA
Error Code
Method of Error
Detects 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
 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 463.
393
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
NO
NO
NO
SiUS372201EB
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