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SiBE28-804
Troubleshooting by Remote Controller Display / LED Display
Troubleshooting
227
Checking the Thermistors
Thermistors
If the cause of the problem is related to the thermistors, then the thermistors should be checked
prior to changing the PC board.
For more information about these thermistors, see:
“Wiring Diagrams’’ (outdoor units)
“Functions of Thermistors” on P33.
Overview of
thermistors
The table below contains an overview of the thermistors:
Checking
To check the thermistors, proceed as follows:
Check No.3
Thermistor
Description
Indoor
R1T
Suction air thermistor
R2T
Heat exchanger thermistor
Outdoor
R1T
Ambient air thermistor
R2T
Discharge pipe thermistor
R3T
Suction pipe thermistor
R4T
Heat exchanger thermistor
R5T
Intermediate heat exchanger thermistor
R6T
Liquid pipe thermistor
R10T
Power module fin thermistor
Step
Action
1
Disconnect the thermistor from the PC board.
2
Read the temperature and the resistor value.
3
Check if the measured values correspond with the values in the table on the next pages.
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 ...