Daikin RXSQ24TAVJU Service Manual page 216

Troubleshooting by Error Code
Troubleshooting
∗1: Make a comparison between the voltage of the pressure sensor and that read by the pressure
Note:
CHECK 12
203
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
(Does the remote controller
display an error other
(1) Mount a pressure gauge on the low pressure
service port.
(2) Reset the operation using the remote
controller, and then restart the operation.
characteristics of the
Service Checker CHECK 12
Compare the low pressure value checked with the Service
Checker and the actual value measured by pressure sensor
(∗1).
measured by pressure sensor
· The low pressure sensor is normal, and the pressure
detected with the PCB is also normal.
· The low pressure has really become low.
Remove the causes by which the low pressure
CHECK 2
has become low.
gauge.
(As to the voltage of the pressure sensor, make measurement of voltage at the connector, and
then convert it to pressure.
CHECK 2 Refer to page 258.
Refer to page 269.
Is the stop NO
valve open?
YES
Is the
indoor unit failing?
NO
than E4?)
YES
Are the
NO
low pressure
sensor normal?
(∗1)
YES
Check if the
low pressure value
NO
and the actual value
are the same.
YES
CHECK 12 )
SiUS331708EA
Open the stop valve.
Eliminate the indoor unit error.
Replace the low pressure sensor.
Replace the outdoor main
PCB (A1P).
Service Diagnosis