Daikin RZQG71L9V1, Service Manual

Page: 166 / 215

Troubleshooting by Remote Controller ESIE15-13C
152 Service Diagnosis
4.20 High Pressure Switch System Abnormality
Remote
Controller
Display
H3
Applicable
Models
RZQG125, 140
Method of Error
Detection
The protection device circuit checks continuity in the high pressure switch (S1PH).
Error Decision
Conditions
When there is no continuity in the high pressure switch during compressor stops operating.
Supposed
Causes

Incomplete high pressure switch
 Defective connection of high pressure switch connector
 Defective outdoor unit PCB

Disconnected lead wire
Troubleshooting
Note:
*1 Connector and indoor unit PCB
Model Connector for high pressure switch PCB
RZQG X32A A1P
Connect correctly.
Replace the outdoor unit PCB
(A1P).
NO
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Wait for 10 minutes after the unit
stops operating, then check the
following.
YES
Replace the high pressure
switch with no continuity.
Resistance in normal operation :
10
Ω
or less
NO
YES
Replace the lead wire.
NO
YES
Is protection
high pressure switch connector
(
∗
1) correctly connected to
outdoor unit PCB?
Is there continuity
in each protection high
pressure switch?
Is there continuity
in lead wire?