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Additional Checks for Troubleshooting
ESIE02–01
3–72
Part 3 – Troubleshooting
3
1
3
4
5
5.8
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:
■
’Wiring Diagrams: Outdoor Units’
■
‘Wiring Diagrams: Indoor Units’
■
"Functions of Thermistors: Large Heat Pumps" on page 5.
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 (coil thermistor)
Outdoor
R1T
Ambient air thermistor
R2T
Heat exchanger thermistor (coil thermistor)
R3T
Discharge pipe 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.
Summary of Contents for Sky Air R-407C
Page 1: ...ESIE02 01 Service Manual Sky Air R 407C B series SV p p p...
Page 2: ......
Page 3: ...ESIE02 01 Service Manual Sky Air R 407C B series SV p p p...
Page 4: ......
Page 16: ...Introduction ESIE02 01 xii 3 1 4 5...
Page 18: ...ESIE02 01 1 2 Part 1 System Outline 3 1 1 5...
Page 42: ...General Outline Outdoor Units ESIE02 01 1 26 Part 1 System Outline 3 1 1 4 5...
Page 49: ...ESIE02 01 General Outline Indoor Units Part 1 System Outline 1 33 3 1 4 5...
Page 72: ...General Outline Indoor Units ESIE02 01 1 56 Part 1 System Outline 3 1 1 4 5...
Page 86: ...Specifications ESIE02 01 1 70 Part 1 System Outline 3 1 1 4 5...
Page 110: ...ESIE02 01 1 94 Part 1 System Outline...
Page 130: ...Switch Box Layout ESIE02 01 1 114 Part 1 System Outline 3 1 1 4 5...
Page 180: ...PCB Layout ESIE02 01 1 164 Part 1 System Outline 3 1 1 4 5...
Page 182: ...ESIE02 01 2 2 Part 2 Functional Description 3 1 2 5...
Page 204: ...General Functionality ESIE02 01 2 24 Part 2 Functional Description 3 1 2 4 5...
Page 216: ...Overview of the cooling mode functions ESIE02 01 2 36 Part 2 Functional Description 3 1 2 4 5...
Page 232: ...ESIE02 01 3 2 Part 3 Troubleshooting 3 1 3 5...
Page 294: ...Error Codes System Malfunctions ESIE02 01 3 64 Part 3 Troubleshooting 3 1 3 4 5...