Daikin VRV RXYQ72-384XAYCA, Service Manual

Page: 312 / 419

Troubleshooting by Error Code SiUS342004EB
305 Part 6 Service Diagnosis
Reference
3.47 Low Pressure Sensor Abnormality
Applicable
Models
All outdoor unit models
Error Code
JC
Method of Error
Detection
Detect according to temperature detected with the low pressure sensor.
Error Decision
Conditions
The low pressure sensor is short circuit or open circuit.
(Pressure range: 0-1.7 MPa (0-247 psi))
Supposed
Causes

Defective low pressure sensor

Connection of high pressure sensor in mistake for low pressure sensor

Defective outdoor unit main PCB

Defective connection of low pressure sensor
Troubleshooting
CHECK 12 Refer to page 369.
Check 12
Are the
characteristics of
the low press u re sensor
normal? (Make a comparison
b etween v oltage
characteristics and
ga u ge press u re.)
Replace the low press u re sensor
(S1NPL).
Replace the o u tdoor u nit main PCB
(A1P).
NO
Check 12
Is the PCB
detection press u re
normal? Make a comparison
b etween data on press u re checked
b y the Ser v ice Checker and
the v oltage
characteristics.
Replace the o u tdoor u nit main PCB
(A1P).
NO
Are the
characteristics of the low
press u re sensor normal?
Replace the low press u re sensor
(S1NPL).
NO
YES
YES
YES
Reset the operation, and then
restart operation.
(1) Mo u nt a press u re ga u ge on the
low press u re ser v ice port.
(2) Connect the Ser v ice Checker for
VRV systems.
Caution
Be s u re to t u rn off the power switch b efore connecting or disconnecting
connectors, or parts may b e damaged.