Daikin RXSQ24TAVJU, Service Manual

Page: 216 / 311

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