Daikin REYQ8-48PY1B, Руководство по обслуживанию

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SiBE37-701_B Troubleshooting by Indication on the Remote Controller
Troubleshooting 316
3.37
“
JC
”
Outdoor Unit: Malfunction of Low Pressure Sensor
Remote
Controller
Display
JC
Applicable
Models REYQ8P~48P
Method of
Malfunction
Detection Malfunction is detected from the pressure detected by the low pressure sensor.
Malfunction
Decision
Conditions When the low pressure sensor is short circuit or open circuit.
(Not less than 1.77MPa, or -0.01MPa and below)
Supposed
Causes
„
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
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Are the characteristics of the low
pressure sensor normal? (Make
a comparison between the
voltage characteristics (
∗
1) and
the gauge pressure.)
NO
Replace the low pressure sensor.
Confirm which high pressure
sensor is abnormal using
outdoor unit "monitor mode".
(Refer to P.255~P.256)
1. Set the low pressure gauge
upright.
2. Connect the checker for
VRV to the gauge.
If the PCB pressure
detection normal? (Make a
comparison between the
checker pressure data and
the voltage characteristics
(
∗
1).)
Reset the operation, and then
restart the outdoor unit.
Are the
characteristics of
the low pressure
sensor normal?
Replace the main PCB.
Replace the low pressure sensor.
Replace the main PCB.
NO
NO
YES
YES
YES