Additional Checks for Troubleshooting
ESIE05-03
3–106
Part 3 – Troubleshooting
3
1
3
4
5
5.4
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 PCB.
For more information about these thermistors, see:
P
’Wiring Diagrams’’ (outdoor units)
P
“Functions of Thermistors” on page 2-4.
Overview of
thermistors
The table below contains an overview of the thermistors:
Checking
To check the thermistors, proceed as follows:
Thermistor
Description
Indoor
R1T
Suction air thermistor
R2T
Heat exchanger thermistor
R3T
Gas pipe thermistor
Outdoor
R1T
Ambient air thermistor
R2T
Heat exchanger thermistor
R3T
Discharge pipe thermistor
R4T
Suction pipe thermistor
R5T
Power module fin thermistor
Step
Action
1
Disconnect the thermistor from the PCB.
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.
ESIE05-03.book Page 106 Wednesday, April 6, 2005 4:09 PM
Summary of Contents for RZQ100B7W1B
Page 1: ...Service Manual ESIE05 03 RZQ71 125B8V3B RZQ100 140B7W1B Sky Air Inverter R 410A B series...
Page 2: ......
Page 10: ...ESIE05 03 viii Table of Contents 3 1 4 5...
Page 24: ...ESIE05 03 1 2 Part 1 System Outline 3 1 1 5...
Page 32: ...General Outline Outdoor Units ESIE05 03 1 10 Part 1 System Outline 3 1 1 4 5...
Page 42: ...Specifications ESIE05 03 1 20 Part 1 System Outline 3 1 1 4 5...
Page 56: ...Functional Diagrams ESIE05 03 1 34 Part 1 System Outline 3 1 1 4 5...
Page 58: ...ESIE05 03 1 36 Part 1 System Outline...
Page 70: ...Wiring Diagrams ESIE05 03 1 48 Part 1 System Outline 3 1 1 4 5...
Page 84: ...PCB Layout ESIE05 03 1 62 Part 1 System Outline 3 1 1 4 5...
Page 86: ...ESIE05 03 2 2 Part 2 Functional Description 3 1 2 5...
Page 110: ...General Functionality ESIE05 03 2 26 Part 2 Functional Description 3 1 2 4 5...
Page 150: ...ESIE05 03 3 2 Part 3 Troubleshooting 3 1 3 5...
Page 188: ...Troubleshooting ESIE05 03 3 40 Part 3 Troubleshooting 3 1 3 4 5...
Page 264: ...Additional Checks for Troubleshooting ESIE05 03 3 116 Part 3 Troubleshooting 3 1 3 4 5...
Page 266: ...ESIE05 03 4 2 Part 4 Commissioning and Test Run 3 1 4 5...
Page 306: ...ESIE05 03 5 2 Part 5 Disassembly and Maintenance 3 1 5...