Daikin VRV RXYQ72-384XAYCA Service Manual page 292

Troubleshooting by Error Code
Reference
CHECK 1 Refer to page 357.
Reference
CHECK 12 Refer to page 369.
285
A
CHECK 12
Compare the
voltage
measurement of the
connector of the pressure
NO
sensor ( 1) with the
measurement of the pressure
gauge. Are the
characteristics of the
( 1) Use the table on CHECK 12 to
high pressure
convert the voltage measurement into
sensor
normal?
YES
CHECK 12
Service Checker
Connect the service checker, and then compare the high pressure value
measured by the service checker with the voltage measurement of the
connector of the pressure sensor ( 1)
Are both
NO
pressure values
the
same?
YES
-The high pressure sensor is normal, and outdoor unit main PCB is also
normal.
-The high pressure has really become high.
CHECK 1 : Eliminate factors that cause the high pressure to rise.
pressure measurement.
SiUS342004EB
Replace the high pressure sensor
(S1NPH).
Replace the outdoor unit
main PCB (A1P).
Part 6 Service Diagnosis