Pressure Sensor Abnormality - Daikin RZQ Series FCQ20EVA Service Manual

Troubleshooting by Remote Controller

4.26 Pressure Sensor Abnormality

J1
Error Code
Applicable RZQ
Models
Method of Error
The error is detected by the pressure measured with pressure sensor (S1NPH)
Detection
Error Decision
When the detect pressure becomes following;
Conditions
 Defective pressure sensor
Supposed
 Defective outdoor unit PCB
Causes
 Defective connection of connector
Troubleshooting
Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
Check if the connector for the
pressure sensor (X17A) is correctly
connected to the outdoor unit PCB.
CHECK 5
Measure the voltage (V) between the
pins # (1) and (3) of the above
connector.
Is the relation between the
pressure and the voltage
CHECK 5 Refer to P.157.
123
 Detected pressure  – 0.05MPa continues 185 seconds
 Detected pressure  4.4MPa continues 185 seconds
NO
Is it connected
correctly?
YES
CHECK 5
NO
normal?
YES
SiME281501E
Connect correctly.
Replace the pressure sensor
(S1NPH).
Replace the outdoor unit PCB
(A1P).
Service Diagnosis