Mitsubishi Electronics U1, MUZ-D36NA, MUY-D36NA, MUZ-D30NA, MUY-D30NA Blk Wht Wht Red, Ylw Brn

Page 27

10-4. TROUBLE CRITERION OF MAIN PARTS MUZ-D30NAMUZ-D36NAMUY-D30NAMUY-D36NA

Part name

 

 

 

Check method and criterion

 

 

Figure

 

Defrost thermistor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(RT61) (MUZ)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ambient temperature

Measure the resistance with a tester.

 

 

 

 

 

thermistor (RT65)

Refer to 10-6. “Test point diagram and voltage”, 1. “Outdoor electron-

 

 

 

 

 

Outdoor heat ex-

ic control P.C. board”, the chart of thermistor.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

changer temperature

 

 

 

 

 

 

 

 

 

 

 

 

 

 

thermistor (RT68)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Discharge tem-

Measure the resistance with a tester. Before measurement, hold the

 

 

 

 

 

perature thermistor

 

 

 

 

 

thermistor with your hands to warm it up.

 

 

 

 

 

(RT62)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fin temperature

Refer to 10-6. “Test point diagram and voltage”, 1. “Outdoor electron-

 

 

 

 

 

ic control P.C. board”, the chart of thermistor.

 

 

 

 

 

thermistor (RT64)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Measure the resistance between terminals using a tester.

 

 

W RED

 

 

(Winding temperature : 14 ~ 104 °F (-10 ~ 40 °C))

 

 

 

Compressor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Normal

 

 

 

 

 

 

 

 

 

 

 

1.24

~ 1.53 Ω

 

 

 

V

U

 

 

 

 

 

 

 

WHT

BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Measure the resistance between lead wires using a tester.

 

 

 

 

 

 

(Part temperature : 14 ~ 104 °F (-10 ~ 40 °C))

 

 

 

RED U (W)

 

 

 

 

 

 

 

 

 

 

 

 

 

Outdoor fan motor

 

 

Color of lead wire

 

 

Normal

 

 

 

 

 

WHT

 

 

 

 

 

 

 

 

 

 

 

 

 

RED – BLK

 

 

 

 

 

 

 

 

V (V)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

13 ~ 16 Ω

 

 

 

 

 

BLK W (U)

 

 

 

BLK – WHT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHT – RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Measure the resistance using a tester.

 

 

 

 

 

 

(Part temperature : 14 ~ 104 °F (-10 ~ 40 °C))

 

 

 

 

 

R. V. coil (MUZ)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Normal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.20

~ 1.55 kΩ

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Measure the resistance using a tester.

 

 

 

 

 

 

(Part temperature : 14 ~ 104 °F (-10 ~ 40 °C))

WHT

 

 

 

 

 

 

 

 

 

RED

 

LEV

 

Linear expansion

 

 

Color of lead wire

 

Normal

 

 

 

 

WHT – RED

 

 

 

 

ORN

 

 

 

valve

 

 

 

 

 

 

 

 

 

 

 

RED – ORN

 

38 ~ 50 Ω

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YLW – BRN

 

 

 

 

YLW BRN BLU

 

 

 

 

 

 

 

 

 

 

 

 

BRN – BLU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

27

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Contents Outdoor Unit Page Part Names and Functions Technical ChangesTNB220FMCHT TotalHspf COPOperating Range ARISeer Required Space Outlines and DimensionsWiring Diagram MUY-D30NA MUY-D36NA LEV Refrigerant System DiagramMAX. Refrigerant Piping Length and MAX. Height Difference Performance Data Cooling Capacity DataHeating Performance Curve CoolingMUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NACondensing Pressure Cooling 380 420 340 300 26068 100 105F MSZ-D30NA MSZ-D36NA MSY-D30NA MSY-D36NA Standard Operation DataInput correction factors Test RUN Operation How to operate fixed-frequency operation Relation between main sensor and actuator Actuator ControlOutdoor FAN Motor Control R.V. Coil Control MUZService Functions Change in Defrost SettingPRE-HEAT Control Take care of the following during servicing TroubleshootingFailure Mode Recall Function Operational procedure Outdoor unit failure mode table LED LED1 LED2 Troubleshooting Check TableMUZ YLW BRN BLK WHT WHT REDTroubleshooting Flow How to check inverter/ compressorCheck of outdoor thermistors Heating operation does not work Check of R.V. coil MUZ-D30/36Check of outdoor fan motor Check of power supplyCheck of LEV Check of compressor start failureHow to check miswiring and serial signal error Check of HPS Electromagnetic noise enters into TV sets or radios Outdoor electronic control P.C. board Test Point Diagram and VoltageNoise filter P.C. board CN5 Outdoor power boardCN2 CN3Removing the cabinet Photo Disassembly InstructionsPhoto 5 Inverter assembly Removing R.V. coil MUZHPS MUZ Temperature thermistor and ambient temperatureThermistor Removing outdoor fan motorRemoving the reactor Removing the compressor and 4-way valve PhotoPage Specifications subject to change without notice

MUY-D36NA, MUZ-D30NA, U1, MUY-D30NA, MUZ-D36NA specifications

Mitsubishi Electronics has long been at the forefront of innovation in heating and cooling solutions, and its latest lineup of multi-zone air conditioning units—MUZ-D36NA, MUY-D30NA, U1, MUZ-D30NA, and MUY-D36NA—reflects this commitment to quality and efficiency. Designed for both residential and commercial applications, these units offer advanced features that enhance comfort and energy savings.

One of the standout characteristics of these models is their energy efficiency. Each unit is equipped with high SEER (Seasonal Energy Efficiency Ratio) ratings, making them ideal for users looking to reduce energy consumption while maintaining optimal indoor climates. The efficiency is complemented by inverter technology, which allows the compressor to adjust its speed based on the cooling demand. This results in a smoother operation, reduced noise levels, and significant energy savings over time.

These units also feature advanced filtration systems that improve indoor air quality. The included high-performance air filters capture dust, allergens, and other particles, ensuring that occupants breathe cleaner air. Additionally, some models are equipped with a plasma filtration system that actively neutralizes odors and airborne contaminants, making them particularly suitable for allergy sufferers.

Mitsubishi's advanced climate control technologies set these models apart. The system can be easily controlled using a user-friendly remote or via a mobile app, offering convenience and flexibility. The intelligent temperature control ensures that rooms are heated or cooled consistently, regardless of external conditions.

Installation versatility is another highlight. These units can be configured for multi-zone systems, allowing for tailored comfort in different spaces. The compact and sleek design makes them suitable for various installations, whether in homes, offices, or retail environments.

Furthermore, the MUZ-D and MUY-D series are equipped with quiet operation features, ensuring minimal disruption in both residential and commercial settings. This is particularly beneficial in spaces where noise could be a concern, such as bedrooms or conference rooms.

In summary, Mitsubishi's MUZ-D36NA, MUY-D30NA, U1, MUZ-D30NA, and MUY-D36NA offer a powerful combination of energy efficiency, advanced filtration, intelligent controls, and quiet operation. These features make them an excellent choice for anyone looking to enhance indoor comfort while minimizing environmental impact. Whether it's for a single room or an entire building, these units are engineered to deliver reliable performance year-round.
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