Troubleshooting by Indication on the Remote Controller
105
Troubleshooting
Check if
the “low
pressure” value
and the actual
measurement value by
pressure sensor
are the same.
Are the
characteristics
of the low pressure
sensor normal?
(
∗
1)
Is
the stop valve
open?
NO
YES
YES
NO
Replace the low
pressure sensor.
Replace the
outdoor unit main
PCB.
Connect the service checker to compare the “low
pressure” value checked with the Service Checker
and the actual measurement value by pressure
sensor (
∗
1).
Service Checker
Mount a pressure gauge on the low pressure
service port.
Reset the operation using the remote controller,
and then restart the operation.
NO
YES
Open the stop
valve.
Caution
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
· 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.
