Daikin RXQ12AHR Service Manual page 226

Troubleshooting by Error Code
Note(s)
1. Make a comparison between voltage measured by the pressure sensor and that read by the
pressure gauge.
(The pressure sensor makes measurement of voltage at its connector block to convert it to
Pressure. CHECK 12)
Reference
CHECK 1 Refer to page 287.
Reference
CHECK 12 Refer to page 298.
220
A
Service Checker
CHECK 12
Connect the Service Checker, and then make a comparison between "high
pressure" checked by the Service Checker and the measurement of the high
pressure sensor (*1)
Is
the "high
pressure"
checked by the
NO
Service Checker same as
the measurement of
the high pressure
gauge?
YES
-The high pressure sensor is normal, and the 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.
SiAF341904E
Replace the outdoor unit
main PCB (A1P).
Part 6 Service Diagnosis