SiUS28-902_B
Troubleshooting by Indication on the Remote Controller
Service Diagnosis
117
3.22 High Pressure Switch 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
Disconnection in high pressure switch harness
Defective connection of high pressure switch connector
Defective outdoor unit PCB
Disconnected lead wire
Troubleshooting
Caution
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
the connector or parts may
b
e damaged.
Is protection
high press
u
re s
w
itch
connector X32A correctly
connected to
o
u
tdoor
u
nit
PCB?
W
ait for 10 min
u
tes after the
u
nit stops operating, then
check the follo
w
ing.
Is there contin
u
ity
in each protection high
press
u
re s
w
itch?
Replace the o
u
tdoor
u
nit PCB
(A1P).
YES
N
O
N
O
Replace the high press
u
re s
w
itch
w
ith no contin
u
ity.
Resistance in normal operation :
10
W
or less
Replace the lead
w
ire.
Connect correctly.
YES
YES
Is there contin
u
ity in
lead
w
ire?
N
O
