Service diagnosis
4
2
Domestic air conditioner
10.3.8 Power Supply Over or under voltage fault
Outdoor display: LED1 flash 6 times The power supply is over voltage
Method of An abnormal voltage rise or fall is detected by checking the specified voltage detection circuit.
Malfunction
Detection
Malfunction An voltage signal is fed from the voltage detection circuit to the microcomputer
Decision
Conditions
Supposed
■
Supply voltage not as specified
Causes
■
the IPM module is broken
■
the outdoor PCB is broken
Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, or else
parts damage may be occurred.
Electrify the machine again and turn it on with
the remote controller. Check whether the
compressor is started normally
Is it ok?
Yes
Maybe there is some disturbance
NO
No
~230 is ok?
Yes
Yes
This question may be caused by the power. Repair
the power supply.
NO
Change the IPM module
Change the IPM module
Test the outdoor power supply
(+310VDC) with a multimeter.
check whether the power
is >150 V or <390V?
Содержание 1U18TR4ERA
Страница 11: ...Pinping diagrams Domestic air conditioner 4 Piping diagrams 9 EEV EEV ...
Страница 12: ...Operation range Domestic air conditioner 5 Operation range 10 ...
Страница 63: ...Domestic air conditioner Removal of procedure 1 Removal of Outdoor panel 1 ...
Страница 64: ...Domestic air conditioner Loosen the top panel screws 1 2 Lift the top panel Removal of procedure 2 ...
Страница 65: ...Domestic air conditioner Loosen the screws and pull the panel Removal of procedure 3 ...
Страница 66: ...Domestic air conditioner 2 Removal of Electrical Box Removal of procedure 4 ...
Страница 67: ...Domestic air conditioner 3 Removal of Fan and Fan Motor Removal of procedure 5 ...
Страница 68: ...Domestic air conditioner 2 Loosen the fixing screws and remove the motor Removal of procedure 6 ...
Страница 69: ...Domestic air conditioner 4 Removal of Fan Motor Bracket and Partition Removal of procedure 7 ...
Страница 70: ...Domestic air conditioner and remove the reactor Loosen the screw Removal of procedure 8 ...