Mitsubishi Electronics MSZ-A12NA, MSY-A24NA, MSY-A15NA, MSY-A17NA Failure mode recall function

Page 13
Repeated cycle

8-2. 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 (8-4.) 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.

1. Flow chart of failure mode recall function for the indoor/outdoor unit

Those figures show about MSZ-A09/12/15/17.

Operational procedure

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>

1 While pressing both OPERATION SELECT

button and TOO COOL button on the remote controller at the same time, press RESET button.

2First, 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. W1

 

 

 

 

 

W1. Regardless of normal or abnormal condition, a short

Does the left lamp of OPERATION INDICATOR

No

 

 

beep is emitted once as the signal is received.

 

 

 

lamp on the indoor unit blink at the interval of 0.5

 

Indoor unit is normal.

seconds?

(OFF)

 

But the outdoor unit might be abnormal because there are some

Blinks: Either indoor or outdoor unit is abnormal.

 

 

abnormalities that can't be recalled with this way.

 

Beep is emitted at the same timing

 

 

Confirm if outdoor unit is abnormal according to the detailed outdoor

as the blinking of the left lamp of

 

 

unit failure mode recall function.

OPERATION INDICATOR lamp. W2

 

 

 

 

 

 

 

 

Judgment of indoor/outdoor abnormality

Yes

(Blinks)

Before blinking, does the left lamp of

OPERATION INDICATOR lamp stay ON for 3Yes seconds?

Stays ON for 3 seconds (without beep): The outdoor unit is abnormal.

No

The indoor unit is abnormal.

Check the blinking pattern, and confirm the abnormal point with the indoor unit failure mode table(8-2.2.).

Make sure to check at least two consecutive blinking cycles. W2

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.

Repair the defective parts.

Deleting the memorized abnormal condition

The outdoor unit is abnormal.

Check the blinking pattern, and confirm 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. W3

1After repairing the unit, recall the failure mode again according to "Setting up the failure mode recall function" mentioned above.

2Press OPERATE/STOP(ON/OFF) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit.

3Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted.

4Release the failure mode recall function according to "Releasing the failure mode recall function" mentioned above.

Note1.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.

W2. Blinking pattern when the indoor unit is abnormal:

Blinking at 0.5-

Blinking at 0.5-

2.5-second OFF second interval

2.5-second OFF second interval

ON

 

OFF

 

Beeps

Beeps

Repeated cycle

Repeated cycle

Beeps

Repeated cycle

W3.Blinking pattern when the outdoor unit is abnormal:

 

 

Blinking at 0.5-

2.5-second OFF

3-second ON

second interval

ON

 

 

OFF

 

 

 

No beep

Beeps

 

 

Blinking at 0.5-

2.5-second OFF

3-second ON

second interval

 

No beep

Beeps

 

Repeated cycle

 

Repeated cycle

13

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Contents Revised EDITION-A ContentsTechnical Changes Part Names and Functions MSZ-A24NA MSY-A24NA AccessoriesMSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSZ-A24NA MSY-A17NA MSY-A24NASpecification Outlet AIR Speed and Coverage Range Operating RangeMSZ-A09NA MSY-A15NA MSZ-A12NA MSY-A17NA MSZ-A15NA MSZ-A17NA Outlines and DimensionsUnit inch MSZ-A24NA Wiring Diagram MSZ-A09NA MSZ-A12NA Refrigerant System DiagramMSZ-A15NA MSY-A15NA MSZ-A17NA MSY-A17NATimer Short Mode Service FunctionsHow to modify the remote controller P.C. board P.C. Board Modification for Individual OperationAuto Restart Function TroubleshootingOperation How to replace batteries Troubleshooting procedureInformation for Multi System AIR Conditioner Outdoor Unit MXZ seriesThose figures show about MSZ-A09/12/15/17 Failure mode recall functionIndoor unit failure mode table Operation Instruction of troubleshootingIndicates abnormalities Troubleshooting check tableMXZ type Trouble criterion of main partsCheck of indoor fan motor Troubleshooting flowCheck of remote controller and receiver P.C. board Indoor electronic control P.C.Board How to check mis-wiring and serial signal error Electromagnetic noise enters into TV sets or radios Power monitor receiver P.C. board Test point diagram and voltageIndoor electronic control P.C. board SW P.C. boardDisplay P.C. board Receiver Board MSZ-A24NA MSY-24NARemoving the panel Photo Disassembly InstructionsPhoto Removing the electrical box Operating Procedure PhotosRemoving the indoor fan motor and the line flow Photo Removing the horizontal vane motor unit PhotoFan Motor bandRemoving the front panel MSZ-A24NA MSY-A24NA Operating Procedure PhotosRemoving the electronic control P.C. board, the receiver Board and the display P.C. boardRemoving the line flow fan and the indoor fan motor Removing the vane motorAccessory and Remote Controller Parts ListSwitch Holder Nozzle AssemblyBearing Mount Sleeve BearingAIR Cleaning Filter ANTI-ALLERGY Enzyme Filter Catch Front Panel AssemblyScrew CAP GrilleIndoor Unit Functional Parts and Electrical Parts AIR Cleaning Filter ANTI-ALLERGY Enzyme Filter Catechin AIR Filter Right AIR Cleaning Filter MAC-415FT-E Qty/unit Part name RoHSE12 751 E12 A54 235E12 A56 RoHS Part name E12 A5410 G E12 888 007 Lamp Panel Diagram Symbol Wiring Qty/unit Remarks E1211 G E12 A58 620 Indoor Heat Exchanger 11 G E12 408 303 Vane Motor Horizontal E12 A58 300 Indoor FAN Motor Assembly W1MV2 MV1 Right & Left UP & DownAIR Cleaning Filter ANTI-ALLERGY Enzyme Filter Indoor Unit Display Section Microprocessor ControlDRY Operation Cool OperationHeat Operation MSZ FAN d Operation MSYMode selection Auto Change Over ··· Auto Mode Operation MSZFuzzy control MSZ-A09/12/15/17 MSY-A15/17 Auto Vane OperationMSZ-A24 MSY-A24 UpwardCOOL/DRY Heat 3 4 Swing 5Program Timer Timer OperationMade in Japan EMERGENCY/TEST Operation
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MSY-A15NA, MSZ-A09NA, MSZ-A17NA, MSZ-A12NA, MSZ-A24NA specifications

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