YES
NO
NO
YES
Compare the voltage
measurement of the connector
of the pressure sensor (1) with the
measurement of the pressure
gauge. Are the characteristics
of the low pressure
sensor normal?
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.
Is the stop
valve open?
- The low pressure sensor is normal, and outdoor unit main PCB is also normal.
- The low pressure has really become low.
Replace the outdoor unit main
PCB (A1P).
Replace the low pressure sensor
(S1NPL).
Open the stop valve.
CHECK 2
CHECK 12
CHECK 12
CHECK 12
Are both
pressure values the
same?
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
: Eliminate factors that cause the low pressure to fall.
(1) Use the table on to convert
the voltage measurement into pressure
measurement.
Connect the service checker, and then compare the low pressure value
measured by the service checker with the voltage measurement of the
connector of the pressure sensor (1)
Service Checker
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