Low Pressure Sensor Abnormality - Daikin VRV IV-S RXTQ-TAVJU Series Service Manual

Troubleshooting by Error Code

4.29 Low Pressure Sensor Abnormality

JC
Error Code
Applicable
All outdoor units
Models
Method of Error Error is detected from pressure detected by low pressure sensor.
Detection
Error Decision The low pressure sensor is short circuit or open circuit.
Conditions Pressure range: 0-1.7 MPa (0-247 psi)
Supposed
Causes
Troubleshooting
CHECK 12
181
Defective low pressure sensor
Connection of high pressure sensor with wrong connection
Defective outdoor main PCB
Disconnection of low pressure sensor
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Does
the low-
pressure sensor
connect to the designated
connector of the outdoor
main PCB (A1P)?
YES
CHECK 12
Are the characteristics of
the low pressure sensor
normal? (Make a comparison between
the voltage characteristics and
the gauge pressure.)
YES
CHECK 12
Is the PCB pressure
detection normal? (Make a
comparison between the checker
pressure data and the voltage
characteristics.)
YES
Reset the operation, and then
restart the outdoor unit.
Are the
characteristics of the
low pressure sensor
normal?
YES
Refer to page 234.
NO
NO
NO
NO
SiUS331604E
Connect the low-pressure sensor
correctly and then restart
operation.
Replace the low pressure sensor.
Replace the outdoor main PCB
(A1P).
Replace the low pressure sensor.
Replace the outdoor main PCB
(A1P).
Service Diagnosis