Mitsubishi Electronics U1, MUZ-D36NA, MUY-D36NA, MUZ-D30NA, MUY-D30NA 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 left lamp of OPERATION INDICATOR 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 the left

(OFF)

lamp of OPERATION INDICATOR 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" mentioned 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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Image 22 Contents
Outdoor Unit Page Technical Changes Part Names and FunctionsCOP TotalHspf TNB220FMCHTARI Operating RangeSeer Outlines and Dimensions Required SpaceWiring Diagram MUY-D30NA MUY-D36NA Refrigerant System Diagram LEVMAX. Refrigerant Piping Length and MAX. Height Difference Data Performance Data Cooling CapacityMUY-D36NA Performance Curve CoolingMUZ-D30NA MUZ-D36NA MUY-D30NA HeatingCondensing Pressure Cooling 380 420 340 300 26068 100 105F Standard Operation Data MSZ-D30NA MSZ-D36NA MSY-D30NA MSY-D36NAInput correction factors Test RUN Operation How to operate fixed-frequency operation R.V. Coil Control MUZ Actuator Control Outdoor FAN Motor Control Relation between main sensor and actuatorChange in Defrost Setting Service FunctionsPRE-HEAT Control Troubleshooting Take care of the following during servicingFailure Mode Recall Function Operational procedure Outdoor unit failure mode table LED Troubleshooting Check Table LED1 LED2MUZ BLK WHT WHT RED YLW BRNHow to check inverter/ compressor Troubleshooting FlowCheck of outdoor thermistors Check of R.V. coil MUZ-D30/36 Heating operation does not workCheck of power supply Check of outdoor fan motorCheck of compressor start failure Check of LEVHow to check miswiring and serial signal error Check of HPS Electromagnetic noise enters into TV sets or radios Test Point Diagram and Voltage Outdoor electronic control P.C. boardNoise filter P.C. board CN3 Outdoor power boardCN2 CN5Disassembly Instructions Removing the cabinet PhotoRemoving R.V. coil MUZ Photo 5 Inverter assemblyHPS Removing outdoor fan motor Temperature thermistor and ambient temperatureThermistor MUZRemoving the compressor and 4-way valve Photo Removing the reactorPage Specifications subject to change without notice