Eeprom Error Or Option Error; Mpi Feedback ErrorWhen E186 Is Displayed - Samsung AQ07**SER Series Service Manual

4-3-4 EEPROM Error or Option Error

1. Checklist :
1) If all lamps of Indoor unit are blinking or E16 is displayed,plug out,plug in power plug again and press ON/OFF key to retry.
) If the unit is not working properly or all lamps are continuously blinking or E16 is displayed after resetting the option code,
see if the correct option code is set up for its model.
3) Nevertheless, if all lamps are blinking or E16 is displayed, exchange the main PBA.
4-3-5 MPI Feedback Error  When E186 is displayed
1. Checklist :
1) Is the mpi connector properly connected with the connector(CN81)?
. Troubleshooting procedure
After unplugging out the power cord should be
reconnected within 5 seconds
Does the Operation Lamp blink?
Measure the voltage of #4 of the
CN81 connector and # of the CN44
Poor Ass'y PCB Replace
Samsung Electronics
Yes
Yes
Press the mpi button
Yes
E186 is displayed?
No
connector.
Below 11V?
No
No
Check as in the procedure "No power parts"
No
Yes
Poor MPI Replace
Normal
4-7