2-13. E: 74. Outdoor temperature thermistor error (Outdoor unit)
Indicator
Indoor unit
Operation indicator
7 time flash
Timer indicator
4 time flash
Economy indicator
Continuous flash
Error code
E: 74
Detective actuator
Outdoor unit main PCB
When outdoor temperature thermistor open or short
circuit is detected at power on or while running the
compressor
Outdoor temperature thermistor
Forecast of cause
Connector failure
Thermistor failure
Main PCB failure
Check point 1. Check connection of connector
•
Check if connector is loose or removed.
•
Check erroneous connection.
•
Check if thermistor cable is open
-> Reset power when reinstalling due to removed connector or incorrect wiring.
↓
Check point 2. Remove connector and check thermistor resistance value
•
For the outdoor temperature thermistor resistance value, refer to
•
If thermistor is either open or shorted, replace it and reset the power.
↓
Check point 3. Check voltage of main PCB
Make sure circuit diagram of outdoor unit and check terminal voltage at thermistor
(DC 5.0 V).
NOTE:
For details of thermistor connector, refer to
TECHNICAL DATA AND PARTS LIST on page 02-13.
(07-12 models: P5)
If the voltage does not appear, replace main PCB.
↓
End
2-13. E: 74. Outdoor temperature thermistor error (Outdoor unit)
- (03-19) -
2. Troubleshooting with error code
TROUBLESHOOTING
TROUBLESHOOTING
Содержание General ASHG07KPCE
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Страница 5: ...1 GENERAL INFORMATION 2021 12 16 SR_CH01_AS059EG_01 ...
Страница 13: ...2 TECHNICAL DATA AND PARTS LIST 2022 07 07 SR_CH02_AS059EG_02 ...
Страница 31: ...3 TROUBLESHOOTING 2022 07 07 SR_CH03_AS059EG_02 ...
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Страница 92: ...6 2 Outdoor unit 03 58 6 Thermistor resistance values TROUBLESHOOTING TROUBLESHOOTING ...
Страница 93: ...4 CONTROL AND FUNCTIONS 2022 07 07 SR_CH04_AS059EG_02 ...
Страница 125: ...5 FILED WORKING 2022 07 07 SR_CH05_AS059EG_02 ...