SiUS181631EA Troubleshooting for Outdoor Unit
Troubleshooting 243
7.15 High Pressure Sensor Abnormality
Error Code
JA
Method of Error
Detection
The pressure detected by high pressure sensor determines the error.
Error Decision
Conditions
When the high pressure sensor is short circuit or open circuit
Supposed
Causes
îš„
Defective high pressure sensor
îš„
Wrong connection with low pressure sensor
îš„
Defective main PCB (A1P)
Troubleshooting
∗
1: Voltage measurement point
For pressure/voltage characteristics graph, refer to Pressure Sensor on page 269.
Is the high
pressure sensor
connected to X17A (red) on
the main PCB
(A1P)?
Is the voltage normal
when measured between
the pins 1 and 3 of
X17A? (See ∗1)
Replace the high pressure
sensor.
(R23969)
Connect the high pressure
sensor and turn on again.
NO
Replace the main PCB
(A1P).
NO
YES
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Main PCB (A1P)
X17A (Red)
Red
Black
High pressure sensor
White
(R13032)
Measure the voltage here.
Microcomputer
A/D input
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