AE-M18 (serv.man2) - Sharp Air Conditioner Service Manual (repair manual). Page 18

18

This unit has a fuction to diagnose major troubles by itself.
Six kinds of troubles can be detected and informed.
Before repair, first call up the trouble information with the self-disgnosis function, and check it.

(1) In case of some troubles(error No. 1 thru 3), the operation will be stopped if any trouble occurs.

LED on the indoor unit will ficker to  automatically inform the trouble occurrence.
The timer LED fickers as shown in Fig. T-1.(The operation LED is turns off.)

(2) Call up of trouble information(For details, refer to the self-diagnosis table in Page 20.)

When the operation is stopped, continuously press both AUX button and TEST RUN button for 5 seconds,
the error information display mode will be selected to ficker the timer LED and operation LED in order to
display the error information.
Even through the buttons are released, it will be continously displayed to erase the error display, press the
"OI" Button in the remote control or AUX button.

Example : Wiring connector between the units is improper.
Note       : If the power plug is disconnected, the memory of the error information will be erased.

1 second

4 second

1 second

ON

Timer LED

OFF

ON

1

2

3

4

5

Timer LED

OFF

ON

Operation LED

OFF

If the timer LED fickers 5 times, it will be regarded as 
one block information will be displayed depending on
 the state of the operation LED.