![background image](http://html1.mh-extra.com/html/daikin/vrv-iii-rqq8-48py1/vrv-iii-rqq8-48py1_service-manual_2459193086.webp)
Diagnosis Servis
76
Penyelesaian Masalah Menggunakan Remote Kontrol
Si341213
(4)
(3)
(2)
(1)
Is the stop
valve open?
NO
YES
(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.)
NO
YES
Service Checker
Connect the service checker to compare the
“low pressure”
value and the actual measurement value by pressure
sensor by using the service checker.
CHECK 12
Are the “low
pressure” value
and the actual
measurement
value by pressure
sensor the same?
NO
YES
Penyelesaian
Masalah
Perhatian
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Open the stop valve.
Replace the sensor tekanan rendah.
Replace the unit outdoor main
PCB (A1P).
1. Make a comparison between the voltage of the pressure sensor and that read by the
pressure gauge.
CHECK 12
(As to the voltage of the pressure sensor, make measurement of voltage at the connector,
and then convert it to pressure.)
+5V
Connector for sensor tekanan
rendah (Blue)
Red
Micro-computer
A/D input
Make measurement of DC voltage between these wires.
CHECK 2
Refer to P.134
CHECK 12
Refer to P.138
Black
White
· The low pressure sensor is normal, and the pressure
detected with the PCB is also normal.
· The low pressure has really become low.
CHECK 2
Remove the causes by which the low pressure has
become low.
Low
pressure
sensor