Jc" Outdoor Unit: Malfunction Of Low Pressure Sensor - Daikin RTSQ20PY1 Service Manual

SiBE31-801_C
JC
4.34 " " Outdoor Unit: Malfunction of Low Pressure Sensor
JC
Remote
Controller
Display
Applicable RTSQ8P~16P (Outdoor Unit)
Models
Method of Malfunction is detected from the pressure detected by the low pressure sensor.
Malfunction
Detection
Malfunction When the low pressure sensor is short circuit or open circuit.
(Not less than 1.77MPa, or -0.01MPa and below)
Decision
Conditions
Supposed
Causes
Troubleshooting
Troubleshooting
Defect of low pressure sensor system
Connection of high pressure sensor with wrong connection.
Defect of outdoor unit PCB.
Defective connection of low pressure sensor
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Confirm which high pressure
sensor is abnormal using
outdoor unit "monitor mode".
(Refer to P.216~217)
1. Set the low pressure gauge
upright.
2. Connect the checker for
VRV to the gauge.
Are the characteristics of the low
pressure sensor normal? (Make
a comparison between the
voltage characteristics (∗1) and
the gauge pressure.)
YES
If the PCB pressure
detection normal? (Make a
comparison between the
checker pressure data and
the voltage characteristics
(∗1).)
YES
Reset the operation, and then
restart the outdoor unit.
Are the
characteristics of
the low pressure
sensor normal?
YES
Troubleshooting by Indication on the Remote Controller
NO
NO
NO
Replace the low pressure sensor.
Replace the main PCB.
Replace the low pressure sensor.
Replace the main PCB.
272