Specifications

SiBE341027 Troubleshooting by Remote Controller
Service Diagnosis 123
2.13 High Pressure Switch System Abnormality
Remote
Controller
Display
H3
Applicable
Models
RQYQ-PY1B
Method of Error
Detection
The protection device circuit checks continuity in the high pressure switch.
Error Decision
Conditions
When there is no continuity in the high pressure switch when the compressor stops operating.
Supposed
Causes

Defective high pressure switch

Broken of high pressure switch harness

Defective connection of high pressure switch connector

Defective compressor

Defective outdoor unit PCB

Broken of lead wire
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Wait for 10 minutes after unit
stops, then check the
following.
Is there continuity at
the lead wire?
Replace the outdoor unit sub PCB.
YES
NO
Replace the lead wire.
YES
Is the protection high
pressure switch connector
(X32A) correctly connected
to the outdoor unit PCB?
NO
Connect it correctly.
YES
Is there continuity at the
control and protection
high pressure switch?
NO
Replace the high pressure switch
where there is no continuity.
* If normal, the resistance will be
10Ω or less.
NO
Is there a
disconnection or
insulation failure at the
compressor coil?
YES
Replace the compressor.
* If there is a compressor
malfunction, there is the
possibility that the INV. PCB and
outdoor unit PCB have been
damaged. Check that each of
these PCBs is normal.