SiUS281117
Troubleshooting by Remote Controller
144
Service Diagnosis
2.30 High Pressure Switch System Abnormality
Remote
Controller
Display
H3
Applicable
Models
RZR, RZQ
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 during compressor stops operating
Supposed
Causes
Defective high pressure switch
Defective connection of high pressure switch connector
Defective outdoor unit PCB
Disconnected lead wire
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Is
protection
high pressure
switch connector X32A
correctly connected to
outdoor unit PCB
(A1P)?
Wait for 10 minutes after the
unit stops operating, then
check the following.
Is there continuity
in protection high
pressure switch?
Replace the outdoor unit PCB
(A1P).
YES
NO
NO
Replace the high pressure switch
with no continuity.
Resistance in normal operation:
10
Ω
or less
Replace the lead wire.
Connect correctly.
YES
YES
Is there continuity in
lead wire?
NO
