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

SiUS181631EA

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
Supposed
Causes
Troubleshooting
∗
1: Voltage measurement point
For pressure/voltage characteristics graph, refer to Pressure Sensor on page 269.
Troubleshooting
Defective high pressure sensor
Wrong connection with low pressure sensor
Defective main PCB (A1P)
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is the high
pressure sensor
connected to X17A (red) on
the main PCB
(A1P)?
YES
Is the voltage normal
when measured between
the pins 1 and 3 of
X17A? (See ∗1)
YES
Main PCB (A1P)
Microcomputer
A/D input
NO
NO
X17A (Red)
Measure the voltage here.
Troubleshooting for Outdoor Unit
Connect the high pressure
sensor and turn on again.
Replace the high pressure
sensor.
Replace the main PCB
(A1P).
(R23969)
Red
Black
White
(R13032)
243