16
10-2. 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 (10-4.) 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 upper 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 lamp of OPERATION
INDICATOR lamp. *2
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.
No
Yes
The cause of abnormality cannot be found because the abnormality does not recur.
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 figure are all displayed. Then release the but
-
tons.
Before blinking, does upper lamp of
OPERATION INDICATOR lamp stay ON for 3
seconds?
When it stays ON for 3 seconds (without beep):
The outdoor unit is abnormal.
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 10-2.2)
Make sure to check at least 2 consecutive blinking cycles. *2
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 identify the abnormal point by referring
to the table of outdoor unit failure mode recall function. (Refer to outdoor
unit service manual.)
Make sure to check at least 2 consecutive blinking cycles. *3
Repair the failure parts.
Yes
(Blinks)
No
(OFF)
Setting up the failure mode recall function
Judgment of indoor/outdoor abnormality
Releasing the failure mode recall function
Deleting the memorized abnormal condition
Operational procedure
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:
*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
*1. Regardless of normal or abnormal condition, a short beep is
emitted once the signal is received.
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
After repairing the unit, recall the failure mode again according to "Setting up the failure mode recall function" men-
tioned 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.
OBH905
