Vermont Casting MSZ-D36NA User Manual

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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 doesn't recur.

Does the 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 left lamp of OPERATION 

INDICATOR lamp.   2

Indoor unit is normal.
But the outdoor unit might be abnormal because there are some abnor-
malities that can't be recalled with this way.
Confi rm 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 doesn't 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.

  And release the other two buttons after all LCD in operation display section of the     

remote controller is displayed after 3 seconds.

Press OPERATE/STOP (ON/OFF) 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 left lamp of OP-
ERATION INDICATOR lamp stay ON for 3 
seconds?
Stays ON for 3 seconds (without beep):
                      The outdoor unit is abnormal.

The indoor unit is abnormal.
Check the blinking pattern, and confi rm the abnormal point with the indoor unit 
failure mode table. (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 confi rm the abnormal point with the 
outdoor unit failure mode table. (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 OPERATE/STOP (ON/OFF) 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.

 Operational procedure

Yes
 (Blinks)

No
 (OFF)

: 1. Make sure to release the failure mode recall function once it's 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