High Pressure Sensor Abnormality - Daikin RMXS-L Series Service Manual

SiUS181305E

7.15 High Pressure Sensor Abnormality

JA
Error Code
Method of Error
The pressure detected by high pressure sensor determines the error.
Detection
Error Decision
When the high pressure sensor is short circuit or open circuit
Conditions
 Defective high pressure sensor
Supposed
 Wrong connection with low pressure sensor
Causes
 Defective main PCB (A1P)
Troubleshooting
connected to X17A (red) on
1: Voltage measurement point
For pressure / voltage characteristics graph, refer to Pressure Sensor on page 226.
Troubleshooting
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is the high
pressure sensor
NO
the main PCB
(A1P)?
YES
Is the voltage normal
YES
when measured between
the pins 1 and 3 of
X17A? (See ∗1.)?
NO
Main PCB (A1P)
Microcomputer
A/D input
X17A (Red)
Measure the voltage here.
Troubleshooting for Outdoor Unit
Connect the high pressure
sensor and turn on again.
Replace the main PCB
(A1P).
Replace the high pressure
sensor.
(R15428)
Red
Black
White
(R13032)
200