Daikin VRV II-Q RQYQ8-48PY1B Service Manual page 141

SiBE341027
Troubleshooting
Note:
*1. Pressure sensor subject to error code
*2. Voltage measurement point
Service Diagnosis
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
1. Mount the high pressure
gauge.
2. Connect the checker for
VRV.
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
Malfunction code Pressure sensor subject to error code
JA
Outdoor unit PCB (A1P)
Micro-computer
A/D input
CHECK 12 Refer to P.191
NO
NO
NO
High pressure sensor
Connector for high
+5V
pressure sensor
GND
Measure DC voltage here.
Troubleshooting by Remote Controller
Replace the high pressure sensor.
Replace the outdoor unit PCB.
Replace the high pressure sensor.
Replace the outdoor unit PCB.
Electric symbol
S1NPH
X32A
(4) Red
(3)
Black
(2)
(1)
White
131