Daikin VRV RXYQ72-384XAYCA Service Manual page 297

SiUS342004EB
Note(s)
1. Make a comparison between voltage measured by the pressure sensor and that read by the
Reference
CHECK 4 Refer to page 362.
Reference
CHECK 12 Refer to page 369.
Part 6 Service Diagnosis
A
Are
the high
pressure and
ow pressure checked
by the service checker the
same as the actual measured
values of the high and
low pressure
sensors?
YES
CHECK 4
Is the power transistor
normal?
YES
pressure gauge.
(The pressure sensor makes measurement of voltage at its connector block to convert it to
pressure. CHECK 12)
NO
Replace the outdoor unit main
PCB (A1P).
NO
Replace the inverter PCB
(A4P).
Replace the compressor.
Troubleshooting by Error Code
290