Daikin RMXS-L Series, Руководство по обслуживанию

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Troubleshooting for Outdoor Unit SiUS181305E
201 Troubleshooting
7.16 Low Pressure Sensor Abnormality
Error Code
JC
Method of Error
Detection
The pressure detected by low pressure sensor determines the error.
Error Decision
Conditions
When the low pressure sensor is short circuit or open circuit
Supposed
Causes

Defective low pressure sensor

Wrong connection with high pressure sensor

Defective main PCB (A1P)
Troubleshooting

1: Voltage measurement point
For pressure / voltage characteristics graph, refer to Pressure Sensor on page 226.
Is the
low pressure
sensor connected to
X18A (blue) on the
main PCB
(A1P)?
Is the voltage normal
when measured between the
pins 2 and 3 of X18A?
(See
∗
1.)?
Replace the low pressure
sensor.
(R15429)
Connect the low pressure
sensor and turn on again.
NO
Replace the main PCB
(A1P).
YES
YES
NO
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Main PCB (A1P)
X18A (Blue)
Red
Black
Lo
w pressure sensor
White
(R13034)
Measure the voltage here.
Microcomputer
A/D input