22
9-2. FAILURE MODE RECALL FUNCTION
Outline of the function
This air conditioner can memorize the abnormal condition which has occurred once.
Even though LED indication listed on the troubleshooting check table (9-4.) disappears, the memorized failure details can
be recalled.
1. Flow chart of failure mode recall function for the indoor unit
Does upper/left lamp of OPERATION INDICATOR
lamp on the indoor unit blink at the interval of 0.5
seconds?
Blinks: Either indoor or outdoor unit is abnormal.
Beep is emitted at the same timing as the
blinking of upper/left lamp of OPERATION
INDICATOR lamp. 2
Before blinking, does the left lamp of
OPERATION INDICATOR lamp stay ON for 3
seconds?
When it stays ON for 3 seconds (without beep):
The outdoor unit is abnormal.
Indoor unit is normal.
But the outdoor unit might be abnormal because there are some abnor-
malities that cannot be recalled with this way.
[Check if outdoor unit is abnormal according to the detailed outdoor
unit failure mode recall function (
MU-GK36VAT
).(Refer to outdoor unit
service manual.) ]
The indoor unit is abnormal.
Check the blinking pattern, and identify the abnormal point by referring to the
table of indoor unit failure mode recall function. (Refer to 9-2.2)
Make sure to check at least 2 consecutive blinking cycles. 2
Releasing the failure mode recall function
Judgment of indoor/ outdoor abnormality
MS-GK36VAT
MS-GK24VA
MS-GK30VAT
Release the failure mode recall function by the following procedure.
Turn OFF the power supply and turn it ON again.
Press RESET button of the remote controller.
Repair the failure parts.
Deleting the memorized abnormal condition
After repairing the unit, recall the failure mode again according to "Setting up the failure mode recall
function" mentioned above.
Press OPERATE/STOP (ON/OFF)
(MS-GK24VA-
KU1
,
KU2
/ GK30VAT-
KU1
,
KU2
)
/ STOP/
OPERATE (OFF/ON)
(MS-GK24VA-
KU2 U
)(MS-GK30VAT-
KU2 U
/ 36VAT)
button of the remote
controller (the set temperature is displayed) with the remote controller headed towards the indoor unit.
Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted.
Release the failure mode recall function according to "Releasing the failure mode recall function"
mentioned above.
Yes
(Blinks)
Yes
(Blinks)
No
No
(OFF)
Yes
NOTE
: 1. Make sure to release the failure mode recall function after it is set up, otherwise the unit cannot operate properly.
2. If the abnormal condition is not deleted from the memory, the last abnormal condition is kept memorized.
2. Blinking pattern when the indoor unit is abnormal:
ON
OFF
Beeps
Repeated cycle
Repeated cycle
2.5-second OFF
Blinking at 0.5-
second interval
Beeps
Repeated cycle
2.5-second OFF
Blinking at 0.5-
second interval
Beeps
3. Blinking pattern when the outdoor unit is abnormal:
ON
OFF
No beep
Beeps
Repeated cycle
2.5-second OFF
3-second ON
Blinking at 0.5-
second interval
No beep
Beeps
Repeated cycle
2.5-second OFF
3-second ON
Blinking at 0.5-
second interval
Repeated cycle
The cause of abnormality cannot be found because the abnormality does not recur.
Setting up the failure mode recall function
Turn ON the power supply.
<Preparation of the remote controller>
While pressing both OPERATION SELECT button and TOO COOL button on the
remote controller at the same time, press RESET button.
First, release RESET button.
Hold down the other 2 buttons for another 3 seconds. Make sure that the indicators on
the LCD screen shown in the right
fi
gure are all displayed. Then release the buttons.
Press OPERATE/STOP (ON/OFF)
(MS-GK24VA-
KU1
,
KU2
/ GK30VAT-
KU1
,
KU2
)
/
STOP/OPERATE(OFF/ON)
(MS-GK24VA-
KU2 U
/ GK30VAT-
KU2 U
/ GK36VAT)
button
of the remote controller (the set temperature is displayed) with the remote controller
headed towards the indoor unit. 1
Operational procedure
1 Regardless of normal or abnormal condition,
a short beep is emitted once the signal is
received.
MS-GK24VA
MS-GK30VAT
MS-GK36VAT
The outdoor unit is abnormal.
Check the blinking pattern, and identify the abnormal point by referring to the table
of outdoor unit failure mode recall function. (
MU-GK36VAT
) (Refer to outdoor unit
service manual.) Make sure to check at least 2 consecutive blinking cycles. 3
OBH734B
