2-33. E: 77. Heat sink thermistor error (Outdoor unit)
Indicator
Indoor unit
Operation indicator
7 time flash
Timer indicator
7 time flash
Economy indicator
Continuous flash
Error code
E: 77
Detective actuator
Heat sink temperature thermistor
Heat sink temperature thermistor short or open detected
Forecast of cause
Connector failure
Thermistor failure
Inverter 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 Heat sink thermistor resistance value, refer to
•
If thermistor is either open or shorted, replace it and reset the power.
↓
Check point 3. Check voltage of inverter 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 02-117.
If the voltage does not appear, replace inverter PCB.
↓
End
2-33. E: 77. Heat sink thermistor error (Outdoor unit)
- (03-49) -
2. Troubleshooting with error code
TROUBLESHOOTING
TROUBLESHOOTING
Содержание ABHG18KRTA
Страница 4: ......
Страница 5: ...1 GENERAL INFORMATION 2022 08 08 SR_CH01_MU004EG_06 ...
Страница 59: ...2 TECHNICAL DATA AND PARTS LIST 2022 08 08 SR_CH02_MU004EG_11 ...
Страница 62: ......
Страница 212: ...9 17 Model AOHG36KBTA5 02 150 9 PC board diagrams TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST ...
Страница 213: ...3 TROUBLESHOOTING 2022 08 08 SR_CH03_MU004EG_07 ...
Страница 216: ......
Страница 316: ...6 2 Outdoor unit 03 100 6 Thermistor resistance values TROUBLESHOOTING TROUBLESHOOTING ...
Страница 317: ...4 CONTROL AND FUNCTIONS 2022 04 13 SR_CH04_MU004EG_08 ...
Страница 320: ......
Страница 403: ...5 FILED WORKING 2022 08 08 SR_CH05_MU004EG_08 ...