Jc " Outdoor Unit: Malfunction Of Low Pressure Sensor - Daikin VRV III REYQ8PY1 Service Manual

Si37-701
JC
3.34 " " Outdoor Unit:
JC
Remote
Controller
Display
Applicable REYQ8P~48P
Models
Method of Malfunction is detected from pressure detected by 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
Malfunction of Low Pressure Sensor
Defect of low pressure sensor system
Connection of high pressure sensor with wrong connection.
Defect of outdoor unit PC board.
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 low pressure
sensor is abnormal using
outdoor unit "monitor mode".
(Refer to Page 226~227)
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 PC board
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 PC board.
Replace the low pressure sensor.
Replace the main PC board.
(V2808)
281