Daikin RQYQ140-180PY1, Руководство по обслуживанию, Страница: 124 / 231

Troubleshooting by Remote Controller SiBE341001
115 Troubleshooting
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
NO
YES
Open the stop valve.
+5V
Connector for low pressure sensor
Micro-controller
A/D input
Make measurement of DC voltage between these wires.
Red
Black
White
Low
pressure
sensor
(4)
(3)
(2)
(1)
(Blue)
*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 according to information on P.201.)
*2: Make measurement of voltage of the pressure sensor.
YES
NO
NO
YES
Replace the low pressure sensor.
Replace the main PCB (A1P).
Is the stop
valve open?
(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?
(See *1.)
Check if the “low
pressure” value and
the actual
measurement value
by pressure sensor
are the same.
· The low pressure sensor is normal, and the pressure
detected with the PCB is also normal.
· The low pressure has really become low.
Referring to information on P.190, remove the
causes by which the low pressure has become low.
Service Checker
Connect the service checker to compare the “low pressure”
value and the actual measurement value by pressure
sensor (Refer to *1) by using the service checker.
CHECK 2