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

Troubleshooting for Outdoor Unit

7.16 Low Pressure Sensor Abnormality

JC
Error Code
Method of Error The pressure detected by low pressure sensor determines the error.
Detection
Error Decision When the low 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.
244
Defective low pressure sensor
Wrong connection with high 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
low pressure
sensor connected to
X18A (blue) on the
main PCB
(A1P)?
YES
Is the voltage normal
when measured between the
pins 2 and 3 of X18A?
(See ∗1)
YES
Main PCB (A1P)
Microcomputer
A/D input
NO
NO
Measure the voltage here.
Connect the low pressure
sensor and turn on again.
Replace the low pressure
sensor.
Replace the main PCB
(A1P).
(R23970)
X18A (Blue)
Red
Black
White
(R13034)
SiUS181631EA
Troubleshooting