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Troubleshooting by Indication on the Remote Controller
251
Troubleshooting
YES
YES
NO
NO
Check
if the low
pressure is 0.1MPa
or below. (
∗
1)
Check if the
property of low
pressure sensor is
normal. (
∗
2)
Replace the low
pressure sensor.
Remove the
factor of
decreasing low
pressure by
referring to
CHECK 2
.
Replace the main
PCB.
YES
YES
NO
NO
Check if
the
temperature
difference between
the suction pipe and
the heat exchanger
is 20˚C and
over.
Check if
the property
of suction pipe
thermistor and heat
exchanger thermistor
are normal. (
∗
3)
Replace the
thermistor.
Remove the
factor of
superheating by
referring to
CHECK 3
.
Replace the
outdoor unit main
PCB.
Caution
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
In cooling mode
Set up a pressure gauge at the service port on the
low pressure side.
Reset the operation using the remote controller
then restart.
In heating mode
Reset the operation using the remote controller
then restart.