Mitsubishi Electric SUZ-KA25VA5 Service Manual page 21

10-3-3. Self-diagnosis <PAC-YT52CRA>
Retrieve the error history of each unit using the Simple MA controller.
Switch to the self-diagnosis mode.
1
When the A
ON
OFF
displayed.
Set the address or refrigerant address No. you want to self-diagnosis.
2
When the B
Set it to the address No. or refrigerant address No. you want to self-diagnosis.
Self-diagnosis address
or self-diagnosis
refrigerant address
Self-diagnosis result display <error history>
3
(For the contents of the check code, refer to the indoor unit installation
Check code 4 digits or
check code 2 digits
<When there is no error history>
Error history reset
4
The error history is displayed in 3 self-diagnosis results display.
When the D
and refrigerant address flash.
When the error history was reset, the display shown below appears.
When error history reset is failed, the error contents are displayed again.
Self-diagnosis reset
5
There are the following 2 ways of resetting self-diagnosis.
Press the A ON
OFF
→ Resets self-diagnosis and returns to the state before self-diagnosis.
Press the A
ON
OFF
(When operation is
OCH603
button and the
.
C
and C are pressed, the address decreases and increases between 01 and 50 or 00 and 15.
. .
(Alternate
display)
button is pressed 2 times successi vely within 3 seconds, the self- diagnosis object address
.
button and the C
button. Self-diagnosis resets and indoor units stop.
→
prohibited, this operation is ineffective.)
button are pressed for 5 seconds or longer, the figure shown below is
Approximately 3 seconds
after the change operation, the
self-diagnosis refrigerant
address changes from flashing
to a steady light and self-
diagnosis begins.
manual or service handbook.)
Error detection attribute
Address 3 digits or
unit address No. 2 digits
<When opposite side does not exist>
button simultaneously for 5 seconds or longer.
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