Specifications

Troubleshooting by Indication on the Remote Controller Si30-813
224 Troubleshooting
Troubleshooting
NO
NO

Set up a pressure gauge in the service port on the low pressure side.

Connect the Service Checker.

Reset operation with a remote controller and restart operation.
Are the
low pressure
sensor characteristics
normal?
(∗1)
Is the
PC board detector
pressure normal?
(∗2)
Replace the main PC board.
Replace the low pressure sensor.
∗1 : Compare pressure sensor measurements with pressure gauge readings.
(For measurements by a pressure sensor, measure voltage between connectors (2)
and (3) and convert it to pressure in accordance with page 311.)
∗2 : Compare low pressure measured by the Service Checker with pressure sensor
measurements (refer to ∗1).
CHECK 2
: Refer to page 262 to eliminate
the causes of low pressure drop.
In cooling
NO
NO

Connect the Service Checker.

After resetting operation with a remote
controller, restart operation.
Is
PC board detection
temperature normal?
(∗4)
Replace the main PC board.
Replace the thermistor.
∗3 : Compare the thermistor resistance with surface thermostat measurements.
∗4 : Compare the suction pipe temperature checked by the Service Checker with
measurements obtained in ∗3 above.
In heating
Are
characteristics
of the suction pipe thermistor
(R2T) and the heat exchanger
thermistor (R4T)
normal?
(∗3)
CHECK 3
: Refer to page 263 to eliminate
the causes of overheat operation.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.