High Pressure Switch System Abnormality - Daikin SkyAir RZR-P Series Service Manual

SiUS281117

2.30 High Pressure Switch System Abnormality

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