Black & Decker MUZ-FD09NA- U1, MUZ-FD12NA- U1 service manual Operational procedure

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2. Flow chart of the detailed outdoor unit failure mode recall function

Operational procedure

The outdoor unit might be abnormal.

Confirm if outdoor unit is abnormal according to the following procedures.

Confirm that the remote controller is in the failure mode recall function.

With the remote controller headed towards the indoor unit, press TOO COOL or TOO WARM button to adjust the set temperature to 77 ˚F (25 ˚C). 1

1. Regardless of normal or abnormal condition, 2 short beeps are emitted as the signal is received.

Does POWER lamp on the indoor unit blink at the

 

interval of 0.5 seconds?

 

Blinks: The outdoor unit is abnormal. Beep is emitted

No

at the same timing as the blinking of POWER

(OFF)

lamp. 2

 

 

Yes

 

 

 

 

(Blinks)

 

 

 

 

The outdoor unit is abnormal.

Check the blinking pattern, and confirm the abnormal point with the out- door unit failure mode table (10-2.3.).

Make sure to check at least two consecutive blinking cycles. 2

The outdoor unit is normal.

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.

Release the failure mode recall function accord- ing to the left mentioned procedure.

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" (10-2.1.).

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" men- tioned above.

NOTE: 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.

2.Blinking pattern when outdoor unit is abnormal:

Blinking at 0.5-

 

 

 

 

 

 

 

 

Blinking at 0.5-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.5-second OFF

3-second ON

second interval

 

 

 

2.5-second OFF

3-second ON

second interval

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No beep

 

 

 

 

 

 

Beeps

 

 

 

 

 

No beep

 

 

 

 

Beeps

 

 

 

 

 

Repeated cycle

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Repeated cycle

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Repeated cycle

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Contents MUZ-FD09NA MUZ-FD09NA- U1 MUZ-FD12NA MUZ-FD12NA- U1 Page Technical Changes Part Names and FunctionsSpecification MUZ-FD09NA MUZ-FD12NATest condition Operating RangeOutlines and Dimensions Required SpaceWiring Diagram Refrigerant System Diagram MAX. Refrigerant Piping Length and MAX. Height DifferenceData Heating Performance Curve CoolingMUZ-FD09NA MUZ-FD12NA MUZ-FD09NACondensing Pressure Cooling Condensing pressure65 70F Standard Operation Data MSZ-FD09NA MSZ-FD12NATest RUN Operation How to operate fixed-frequency operation Correction of Heating capacityR.V. Coil Control Actuator ControlOutdoor FAN Motor Control Relation Between Main Sensor and ActuatorChange in Defrost Setting Service FunctionsTroubleshooting PRE-HEAT Control SettingFailure Mode Recall Function OFFOperational procedure Outdoor unit failure mode table Troubleshooting Check Table Page Trouble Criterion of Main Parts MUZ-FD09NAMUZ-FD12NA WHT REDTroubleshooting Flow How to check inverter/ compressorCheck of open phase Check of compressorCheck of compressor winding Check of compressor operation timeCheck of compressor start failure Check of outdoor thermistors Unit operates Cool mode even if it is set to Heat modeUnit operates Heat mode even if it is set to Cool mode Check of R.V. coilCheck of power supply Check of outdoor fan motorCheck of LEV Expansion valve Check of inverter P.C. board Emergency OperationPage Electromagnetic noise enters into TV sets or radios Outdoor unitTest Point Diagram and Voltage Inverter P.C. boardDisassembly Instructions Removing the cabinet PhotoPhoto Removing the discharge temperature thermistor Removing the inverter assembly, inverter P.C. board PhotoPhoto 4 inverter assembly Removing R.V. coilRemoving outdoor fan motor Photo Removing the compressor and 4-way valvePage New publication, effective Jan