35
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.
This mode is very useful when the unit needs to be repaired for the abnormality which does not recur.
1. Flow chart of failure mode recall function
for the indoor/outdoor unit
Does the 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 the
upper/left lamp of OPERATION INDICATOR lamp. *2
Indoor unit is normal.
But the outdoor unit might be abnormal because there are
some abnormalities that can't be recalled with this way.
Confirm if outdoor unit is abnormal according to the
detailed outdoor unit failure mode recall function.
No
Yes
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 TEMP
/TOO COOL button on
the remote controller at the same time, press RESET button.
First, release RESET button.
Hold down the other two buttons for another 3 seconds. Confirm all the indicators
on the LCD screen of the remote controller are displayed. Then release the
buttons.
Press OFF/ON (stop/operate) button of the remote controller (the set temperature is
displayed) with the remote controller headed towards the indoor unit. *1
Judgment of indoor/outdoor abnormality
Before blinking, does the upper/left lamp of OPERATION
INDICATOR lamp stay ON for 3 seconds?
Stays ON for 3 seconds (without beep):
The indoor unit is abnormal.
Check the blinking pattern, and confirm the abnormal point with the table of
indoor unit failure mode recall function. (Refer to 9-2.2)
Make sure to check at least two consecutive blinking cycles. *2
Releasing the failure mode recall function
Release the failure mode recall function by the following procedures.
• Turn OFF the power supply and turn it ON again.
• Press RESET button of the remote controller.
The outdoor unit is abnormal.
Check the blinking pattern, and confirm the abnormal point
with the table of outdoor unit failure mode recall function.
(Refer to outdoor unit service manual.)
Make sure to check at least two consecutive blinking
cycles. *3
Repair the defective 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 OFF/ON (stop/operate) button of the remote controller (the set temperature is displayed) with
the remote controller headed towards the indoor unit.
Press the 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.
Operational procedure
Yes
(Blinks)
No
(OFF)
NOTE
: 1. Make sure to release the failure mode recall function once 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.
*1. Regardless of normal or abnormal condition, a short beep is emitted once the signal is received.
*2. Blinking pattern when the indoor unit is abnormal:
*3.Blinking pattern when the outdoor unit is abnormal:
ON
OFF
Beeps
Repeated cycle
Repeated cycle
ON
OFF
No beep
Beeps
Repeated cycle
2.5-second OFF
Blinking at 0.5-
second interval
2.5-second OFF
3-second ON
Blinking at 0.5-
second interval
Beeps
Repeated cycle
2.5-second OFF
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
Beeps
MSZ-GS18NA
MSY-GS18NA
MSZ-GS24NA
MSY-GS24NA
MSZ-GS30/36NA2
MSY-GS30/36NA2
MSZ-GS06/09/12/15NA
MSY-GS09/12/15NA
MSZ-GS30/36NA
MSY-GS30/36NA
E.g.: MSZ type
OBH874A
