SiE71-202
Troubleshooting
Troubleshooting
37
1.4
Indoor Air Thermistor Error
Remote Controller
LCD Display
Error Code
64
Inspection
—
Unit No.
5
LED Indication
Remote Controller
4
Main Unit
5
Error Detection
Method
Temperature detected by inside air temperature sensor is used to detect errors.
Error Generating
Conditions
When value detected by inside air temperature sensor is -40ºC or below (open circuit) or 70ºC or higher
(short-circuit).
Possible Causes
Faulty sensor
Broken wire
Faulty control PCB
Faulty contact in connector
Troubleshooting
Note:
Note 1:
Refer to the thermistor temperature - resistance conversion table when measuring resistance.
Thermistor temperature - resistance conversion table
If measured value deviates significantly from above values, thermistor is faulty.
Use tester to check resistance
Remove Indoor air
thermistor (R1T) from
X12A (3P) on control
PCB, and measure
resistance.
Is
thermistor
normal?
Note 1
YES
NO
Replace indoor air
thermistor.
If there is no faulty
contact, replace
control PCB.
(HF003)
Thermistor
temperature
Sensor resistance
Thermistor
temperature
Sensor resistance
-10ºC or less
108k
Ω
or more
22ºC
Approx. 23k
Ω
-5ºC
Approx. 85k
Ω
24ºC
Approx. 21k
Ω
0ºC
Approx. 66k
Ω
26ºC
Approx. 19k
Ω
5ºC
Approx. 51k
Ω
28ºC
Approx. 18k
Ω
10ºC
Approx. 40k
Ω
30ºC
Approx. 16k
Ω
14ºC
Approx. 33k
Ω
35ºC
Approx. 13k
Ω
16ºC
Approx. 30k
Ω
40ºC
Approx. 11k
Ω
18ºC
Approx. 27k
Ω
50ºC or more
7k
Ω
or less
20ºC
Approx. 25k
Ω
Continuity check
(HL028)
Summary of Contents for VAM 1000FAVE
Page 5: ...SiE71 202 iv Table of Contents ...
Page 13: ...General Constructions SiE71 202 4 General Constructions ...
Page 37: ...Control Functions SiE71 202 28 Control Functions ...
Page 41: ...Circuit Operations SiE71 202 32 Circuit Operations ...
Page 73: ...Supplementary Explanation SiE71 202 64 Supplementary Explanation ...
Page 74: ...SiE71 202 Appendix 65 Part 9 Appendix 1 Appendix 66 1 1 Wiring Diagram 66 ...
Page 77: ...Appendix SiE71 202 68 Appendix ...
Page 81: ...SiE71 202 iv Index ...