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Troubleshooting by Indication on the Remote Controller
SiUS30-1301
198
Service Diagnosis
3.2
8
Low Pressure Sensor Abnormality
Error Code
JC
Applicable
Models
RWEYQ72P, 84P
Method of Error
Detection
Error is detected from pressure detected by low pressure sensor.
Error Decision
Conditions
When the low pressure sensor is short circuit or open circuit
(Not less than 256.65 psi, or -1.45 psi and below)
Supposed
Causes
Defective low pressure sensor system
Connection of high pressure sensor with wrong connection
Defective condensing unit PCB
Defective connection of low pressure sensor
Troubleshooting
Caution
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
connectors, or parts may
b
e damaged.
If the
PCB
press
u
re
detection normal?
(Make a comparison
b
et
w
een the checker
press
u
re data and the
v
oltage characteristics.)
Are the
characteristics of
the lo
w
press
u
re
sensor normal? (Make a
comparison
b
et
w
een the
v
oltage characteristics and
the ga
u
ge press
u
re.)
N
O
Replace the condensing
u
nit PCB.
N
O
YES
1. Mo
u
nt the lo
w
press
u
re
ga
u
ge.
2. Connect the checker for
V
R
V
.
Replace the lo
w
press
u
re sensor.
CHECK 14
CHECK 12
YES
Are the
characteristics of the
lo
w
press
u
re sensor
normal?
Replace the condensing
u
nit PCB.
N
O
YES
Reset the operation, and then
restart the condensing
u
nit.
Replace the lo
w
press
u
re sensor.