SiBE28-804
Troubleshooting by Remote Controller Display / LED Display
Troubleshooting
239
Check for Factors Causing Wet Operation
Check No.15
Faulty crankcase heater
Faulty control
Dirty evaporator
Wet operation
Faulty valve coil
Faulty valve body
Faulty low pressure sensor
Faulty suction pipe thermistor
Faulty control PC board
Faulty fan motor
Referring to the Fault Tree Analysis (FTA) shown below, identify the faulty points.
←
Refer to .
←
Is the heat exchanger clogged?
Refrigerant
dwelling
Excessive refrigerant charging
Faulty superheat
degree control
Decreased
evaporation
capacity
Frequent starts and stops of the compressor
Faulty electronic
expansion valve
Decreased
fan airflow
rate
Decre-
ased
fan
output
←
Are the coil resistance
and insulation normal?
←
Are the voltage characteristics normal?
←
Is the connector properly connected?
Are the thermistor resistance
characteristics normal?
←
Is the pressure value checked with
the Service Checker corresponding
to the measurement of the sensor?
←
Can the fan motor be
rotated with hands?
Are the motor coil
resistance and insulation
normal?
Faulty control PC board
(including capacity setting)
∗
: Reference values for superheat degree to be used in the judgment of wet operation
Suction pipe superheat degree: 4˚C or more
Discharge pipe superheat degree: 5˚C or less
(The values above must be used only for reference purposes. Even it is operated within the
range above, operation may be normal in other conditions.)
Check No. 14
Summary of Contents for FHQ100BUV1B x 2
Page 13: ...SiBE28 804 2 ...
Page 19: ...Model Name and Power Supply SiBE28 804 8 General Information ...
Page 29: ...Specifications SiBE28 804 18 Specifications ...
Page 33: ...Wired Remote Controller SiBE28 804 22 Remote Controller 1 2 Installation ...
Page 34: ...SiBE28 804 Wired Remote Controller Remote Controller 23 ...
Page 93: ...Outdoor Unit Fan Speed Control SiBE28 804 82 Functional Description ...
Page 131: ...Test Run and Operation Data SiBE28 804 120 Test Operation ...
Page 251: ...Troubleshooting by Remote Controller Display LED Display SiBE28 804 240 Troubleshooting ...
Page 277: ...PCB Layout SiBE28 804 266 Appendix ...
Page 297: ...RZQ100 140C7 RZQS125 140C7V1B SiBE28 804 286 Removal Procedure ...
Page 311: ...SiBE28 804 iv Index ...