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

SiUS331604E

4.28 High Pressure Sensor Abnormality

JA
Error Code
Applicable
All outdoor units
Models
Method of Error Error is detected from the pressure detected by 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
Causes
Troubleshooting
CHECK 12
Service Diagnosis
Defective high pressure sensor
Connection of low pressure sensor with wrong connection
Defective outdoor main PCB
Disconnection of high pressure sensor
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Does
the high-
pressure sensor
connect to the corresponding
connector of the outdoor
main PCB (A1P)?
YES
CHECK 12
Are the characteristics of the
high 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
high pressure sensor
normal?
YES
Refer to page 234.
NO
NO
NO
NO
Troubleshooting by Error Code
Connect to the high-pressure
sensor and then reconnect to the
power.
Replace the high pressure sensor.
Replace the outdoor main PCB
(A1P).
Replace the high pressure sensor.
Replace the outdoor main PCB
(A1P).
180