Specifications

SiBE341027 Troubleshooting by Remote Controller
Service Diagnosis 121
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Connect the service checker.
Set up a pressure gauge at the service port on the
high pressure side.
Reset the operation and then restart the operation.
Check if discharge
pipe thermistor
property is normal.
Is suction pipe
thermistor property
normal?
NO
NO
NO
YES
YES
Replace the suction pipe
thermistor.
Replace the discharge pipe
thermistor.
Check if high
pressure sensor
property is normal.
The liquid pipe
temperature is low
(equivalent to the
evaporating
temperature).
YES
YES
NO
Replace the high pressure sensor.
Replace the indoor unit electronic
expansion valve.
Clean the air filter of the indoor
unit.
Service Checker
Look for the following indoor unit by service checker
• Gas pipe temperature (R4T)
-Liquid pipe temperature (R3T) < 3˚C
• Opening degree of electronic expression
valve < 300 pls
&
Stop the indoor unit (the system is in cooling
operation) and check the liquid pipe temperature of
the indoor unit after the system has stabilized.