Daikin RTSQ20PY1 Service Manual page 282

Troubleshooting by Indication on the Remote Controller
Troubleshooting
∗
2: Voltage measurement point
∗
2: Refer to "Pressure Sensor, Pressure / Voltage Characteristics" table on P.410.
271
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 high pressure gauge
upright.
2. Connect the checker for
VRV to the gauge.
Are the characteristics of the
high pressure sensor normal?
(Make a comparison between
the voltage characteristics (∗2)
and the gauge pressure.)
YES
If the PCB pressure
detection normal? (Make a
comparison between the
checker pressure data and
the voltage characteristics
(∗2).)
YES
Reset the operation, and then
restart the outdoor unit.
Are the
characteristics of
the high pressure
sensor normal?
YES
∗
1: Pressure sensor subject to malfunction code
Malfunction code Pressure sensor subject to malfunction code Electric symbol
JA
Outdoor unit PCB (A1P)
Micro-computer
A/D input
NO
NO
NO
High pressure sensor
+5V
GND
∗ 2 Measure DC voltage here.
SiBE31-801_C
Replace the high pressure sensor.
Replace the main PCB.
Replace the high pressure sensor.
Replace the main PCB.
S1NPH
X32A
(4) Red
(3)
Black
(2)
(1) White
Troubleshooting