Daikin Aurora Series, Service Manual

Page: 243 / 333

SiUS341802E Troubleshooting by Error Code
Service Diagnosis 230
2.43 Low Pressure Sensor Abnormality
Error Code
JC
Applicable
Models
All outdoor unit models
Method of Error
Detection
Detect according to temperature detected with the low pressure sensor.
Error Decision
Conditions
The low pressure sensor is short circuit or open circuit.
(Pressure range: 0-1.7 MPa (0-247 psi))
Supposed
Causes
„
Defective low pressure sensor
„
Connection of high pressure sensor in mistake for low pressure sensor
„
Defective outdoor unit PCB
„
Defective connection of low pressure sensor
Troubleshooting
Refer to page 297.
Are the
characteristics
of the low pressure
sensor normal? (Make a
comparison between voltage
characteristics and gauge
pressure.)
Replace the low pressure sensor
(S1NPL).
Replace the outdoor unit main PCB
(A1P).
NO
Is the 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
low pressure sensor
normal?
Replace the low pressure sensor
(S1NPL).
NO
YES
YES
YES
Reset the operation, and then
restart operation.
(1) Mount a pressure gauge on the
low 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
CHECK 12