Mitsubishi Electric PAC-YT53CRAU Manuel D'installation page 23

3 Self-diagnosis result display <Error history> (For the contents of the error code, refer to the indoor
unit installation manual or service handbook.)
Error code 4 digits or
error code 2 digits
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4 Error history reset
The error history is displayed in 3 self-diagnosis results display.
When the D [ FAN] button is pressed two times successively within three seconds, the self-
diagnosis object address and refrigerant address flash.
When the error history was reset, the display shown below appears.
When error history reset failed, the error contents are displayed again.
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5 Self-diagnosis reset
There are the following two ways of resetting self-diagnosis.
Press the A [ON/OFF] button and the C [TEMP.
longer. → Resets self-diagnosis and returns to the state before self-diagnosis.
Press the A [ON/OFF] button. → Self-diagnosis resets and indoor units stop. (When operation is
prohibited, this operation is ineffective.)
11 Remote Controller Check
When the air conditioner cannot be controlled from the Simple MA controller, use this function
to check the remote controller.
1 First check the power mark.
When normal voltage (DC12V) is not applied to the remote
controller, the power mark goes off.
When the power mark is off, check the remote controller
wiring and the indoor unit.
2 Switch to the remote controller check mode.
When the B [TEMP.
or longer, the figure shown below is displayed.
When the A [ON/OFF] button is pressed, remote controller check begins.
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<When there is no error history>
] button and D [
(Alternate
display)
<When opposite side does not exist>
] button simultaneously for 5 seconds or
FAN] button are pressed simultaneously for 5 seconds
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Error detection attribute
Address 3 digits or
unit address No. 2 digits
Power mark