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Daikin VRV III-S RXYMQ36 48PVJU Service Manual Page 143

60 hz.
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Troubleshooting by Indication on the Remote Controller
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged.
Is the stop
valve open?
YES
Mount a pressure gauge on the low pressure
service port.
Reset the operation using the remote
controller, and then restart the operation.
Are the
characteristics of the
low pressure sensor
normal? (*1.)
YES
Service Checker
Connect the service checker to compare the "low pressure" value and the
actual measurement value by pressure sensor (*1) by using the service
checker.
Check if the
"low pressure" value and
the actual measurement value by
pressure sensor are
the same.
YES
· The low pressure sensor is normal, and the pressure detected with the PCB
is also normal.
· The low pressure has become very low.
Referring to information on P.211, remove the cause of the
CHECK 2
increased low pressure.
*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, take measurement of voltage at the connector, and then convert it to
pressure according to information on P.243.
*2: Take measurement of voltage of the pressure sensor.
Micro controller
134
NO
NO
NO
A/D input
Make measurement of DC voltage between these wires.
+5V
Connector for low pressure sensor
(Blue)
(4)
Red
Black
(3)
White
(2)
(1)
Open the stop valve.
Replace the low pressure
sensor.
Replace the main PCB (A1P).
Low
pressure
sensor
Troubleshooting
SiUS34-907

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    RXYQ18PAY6 service manual & vrv Fulform