Domestic Air Conditioner
7.3.1Thermistor or Related Abnormality (indoor unit)
Indoor Display
E1
: Room temperature sensor failure
E2
: Heat-exchange sensor failure
Method of
the temperatures detected by the thermistors are used to determine thermistor errors
Malfunction
Detection
Malfunction
when the thermistor input is more than 4.92V or less than 0.08V during compressor
Decision
operation.
Conditions
* Note:
The values vary slightly in some models
Supposed
Ƶ
Faulty connector connection
Causes
Ƶ
Faulty thermistor
Ƶ
Faulty PCB
Troubleshooting
* Caution
Be sure to turn off power switch before connect or disconnect connector, or
else parts damage may be occurred.
Thermistor resistance check method:
Remove the connector of the thermistor on the PCB, and measure the resistance of thermistor using
tester.The relationship between normal temperature and resistance is shown in the value of indoor
thermistor.
Thermistor resistance check
Is it normal?
Yes
NO
Yes
Is it normal?
NO
Check the connector
i
Correct the connection
Replace the thermistor
Replace the indoor unit PCB
HSU12/18VHJ(DB)
Functions and control
56
Содержание HSU18VHJ(DB)
Страница 3: ...12 VHJ DB 101 101 102 106 ...
Страница 13: ...Domestic Air Conditioner PCB 1 CN31 CN11 CN1 CN32 CN26 CN27 CON2 CN30 CON12 CON8 CH1 10 HSU12 18VHJ DB ...
Страница 15: ... Domestic Air Conditioner PCB 1 CN26 CON1 CON2 CN11 CN32 CN1 CN48 CON8 CON6 CON7 12 HSU12 18VHJ DB ...
Страница 18: ...Domestic Air Conditioner PCB 2 CN1 CN2 CN3 CN4 CN5 CN6 CN7 CN11 CN10 15 HSU12 18VHJ DB ...
Страница 21: ... Domestic Air Conditioner PCB 2 CN1 CN2 CN3 CN4 CN5 CN6 CN7 CN11 CN10 18 HSU12 18VHJ DB ...
Страница 94: ...9 3 1 Removal of Outdoor Panel 9 3 For 12 18K Outdoor unit Removal Procedure HSU12 18VHJ DB 91 ...
Страница 95: ...Loosen the top panel screws 1 2 Lift the top panel HSU12 18VHJ DB Removal Procedure 92 ...
Страница 96: ...Domestic air conditioner Removal Procedure Loosen the csrews and pull the panel HSU12 18VHJ DB 93 ...
Страница 97: ...9 3 2 Removal of Electrical Box HSU12 18VHJ DB Removal Procedure 94 ...
Страница 98: ...9 3 3 Removal of Fan and Fan Motor HSU12 18VHJ DB Removal Procedure 95 ...
Страница 99: ...2 Loosen the fixing screws and remove the motor HSU12 18VHJ DB Removal Procedure 96 ...
Страница 100: ...9 3 4 Removal of fan motor Bracket and Partition HSU12 18VHJ DB Removal Procedure 97 ...
Страница 101: ...and remove the reactor Loosen the screw HSU12 18VHJ DB Removal Procedure 98 ...
Страница 103: ...4 Remove the compre ssor and pipe assay 5 Remove the conden ser HSU12 18VHJ DB Removal Procedure 100 ...
Страница 104: ... SSHQGL SSHQGL 3LSLQJ LDJUDPV 68 9 101 ...
Страница 109: ...10 3 Circuit Diagrams 10 3 1 INDOORUNIT FOR12K Appendix HSU12 18VHJ DB 106 ...