Mitsubishi Electronics MUZ-GE18NA Check of compressor winding, Check of compressor operation time

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Measure the resistance between the lead wires at 3 points.

DCheck of compressor winding

Disconnect the connector (CN61) between the compressor and intelligent power module, and measure the resistance be- tween the compressor terminals.

<<Measurement point>> at 3 points

BLK - WHT

BLK - RED WHT - RED

<<Judgement>> Refer to 10-4.

0[Ω] ················· Abnormal [short] Infinite [Ω]········ Abnormal [open]

NOTE: Be sure to zero the ohmmeter before measurement.

E Check of compressor operation time

●Connect the compressor and activate the inverter. Then measure the time until the inverter stops due to over current.

<<Operation method>>

Start heating or cooling operation by pressing EMERGENCY OPERATION switch on the indoor unit.

(TEST RUN OPERATION: Refer to 7-6.) <<Measurement>>

Measure the time from the start of compressor to the stop of compressor due to overcurrent.

F Check of compressor start failure

<<Judgement>>

0 second

1 second

2 seconds

10 seconds

10 minutes

Compressor starts

Abnormal (IPM failure)

(Compressor winding short)

Abnormal (Compressor lock out) (Starting defect)

Abnormal (Poor contact,)

(Outdoor P.C. board defect) (Disconnected connector)

Abnormal

(Refrigerant circuit defect) (Closed valve)

Normal

Confirm that 1~4 is normal.

• Electrical circuit check

1.Contact of the compressor connector (including CN61)

2.Output voltage of inverter P.C. board and balance of them (See 10-5.)

3.Direct current voltage between DB61(+) and (-) on the inverter P.C. board

4.Voltage between outdoor terminal block S1-S2

Does the compressor run for 10 seconds or more after it starts?

No

After the compressor is heated with a drier, does the compressor start? 1

Yes

 

 

Check the refrigerant circuit.

Yes

 

Check the stop valve.

 

 

 

 

 

Replace the compressor.

No

 

1

Compressor start failure. Activate pre-heat control. (Refer to 9-2. "PRE-HEAT CONTROL SETTING")

Heat the compressor with

a drier for about 20 minutes. Do not recover refrigerant gas while heating.

Heating part

30

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Contents Outdoor Unit Technical Changes Part Names and Functions Specification MUZ-GE09NA MUY-GE09NA MUZ-GE12NA MUY-GE12NAMUZ-GE15NA MUY-GE15NA MUZ-GE18NA MUY-GE18NA Refrigerant charge R410A Lb ozSeer Operating RangeARI HspfOutlines and Dimensions Unit inchWiring Diagram MUZ-GE15NA MUY-GE15NA MUZ-GE18NA MUY-GE18NA Ø3/8 GE12NA Refrigerant System DiagramLEV Ø1/2 GE15NAMUZ MUZ-GE09/12/15NA MUY-GE09/12/15NA GE15Data Performance DataPerformance Curve Cooling MUZ-GE09NA MUY-GE09NAMUZ-GE12NAMUZ-GE15NA MUY-GE12NAMUY-GE15NA MUZ-GE09NA MUZ-GE12NA MUZ-GE18NA MUY-GE18NAHeating MUZ MUZ-GE15NA MUZ-GE18NACondensing Pressure Cooling MUZ-GE12NA MUY-GE12NAMUZ-GE15NA MUY-GE15NA MUZ-GE09NA MUZ-GE15NA SHF Standard Operation DataMSZ-GE09NA MSZ-GE12NA MSY-GE09NA MSY-GE12NA MSZ-GE09NA, MSY-GE09NA MSZ-GE12NA, MSY-GE12NAMUZ-GE15NA MUZ-GE18NA MSZ-GE15NA MSZ-GE18NA MSY-GE15NA MSY-GE18NAMSZ-GE15NA, MSY-GE15NA MSZ-GE18NA, MSY-GE18NA MUZ-GE15NA MUZ-GE18NA MUY-GE15NA MUY-GE18NAHOW to Operate FIXED-FREQUENCY Operation Test run operation Correction of Cooling capacityR.V. Coil Control MUZ Actuator ControlOutdoor FAN Motor Control Relation Between Main Sensor and ActuatorChange in Defrost Setting MUZ Service FunctionsTroubleshooting PRE-HEAT Control SettingFailure Mode Recall Function Operational procedure Outdoor unit failure mode table LEDTroubleshooting Check Table Trouble Criterion of Main Parts GE09 GE12 GE15/18GE09/12 GE15 GE18 Troubleshooting Flow How to check inverter/compressorCheck of open phase Check of compressorCheck of compressor start failure Check of compressor windingCheck of compressor operation time BLK WHT BLK RED WHT REDCheck 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. coil MUZMUZ-GE09/12/15NA MUY-GE09/12/15NA Check of outdoor fan motorCheck of power supply Check of LEV Expansion valve Check of inverter P.C. board Emergency OperationHow to check miswiring and serial signal error Electromagnetic noise enters into TV sets or radios Test Point Diagram and Voltage Inverter P.C. boardLED LEV LED Disassembly 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. coil MUZRemoving outdoor fan motor Photo Removing the compressor and 4-way valveMUZ-GE18NA MUY-GE18NA Operating Procedure Photos Removing R.V. coil Photo5Removing outdoor fan motor Page Page New publication, effective Jul Distributed in Jul . No. OBH 549Made in Japan

MUZ-GE09NA, MUZ-GE15NA, MUY-GE15NA, MUZ-GE18NA, MUZ-GE12NA specifications

Mitsubishi Electronics offers a range of advanced air conditioning systems, including the MUY-GE12NA, MUY-GE18NA, MUY-GE09NA, MUZ-GE12NA, and MUZ-GE18NA models. These units are designed for optimal energy efficiency and superior comfort, making them ideal for residential and commercial applications.

One of the standout features of these models is their inverter technology. By adjusting the compressor speed according to the cooling or heating demand, inverter systems provide precise temperature control while significantly reducing energy consumption compared to traditional units. This not only translates to lower utility bills but also less environmental impact.

The MUY-GE series units come with a user-friendly remote control that allows for easy adjustments of temperature settings, fan speeds, and operational modes. Smart operation modes include cooling, heating, and dehumidification, thereby catering to various climate needs. The units also include a programmable timer, enabling users to set the air conditioner to operate at specific times, enhancing convenience and efficiency.

Another impressive characteristic is the advanced air filtration system. Mitsubishi integrates a multi-stage filtration mechanism that includes a washable pre-filter, a pleated filter, and a high-performance deodorizing filter. This ensures cleaner indoor air by effectively reducing allergens, dust, and odors, contributing to a healthier living space.

The sleek and modern design of these units also allows for easy installation and compatibility with various interior settings. The MUY-GE09NA, MUY-GE12NA, and MUY-GE18NA indoor units are designed to be compact and unobtrusive, while the outdoor units (MUZ series) are engineered for durability and quiet operation.

Noise levels are another critical aspect where Mitsubishi excels. These air conditioning systems operate quietly, making them suitable for bedrooms, offices, and other noise-sensitive environments. Their Whisper-Quiet technology ensures that sound levels during operation remain low, promoting a peaceful atmosphere.

Mitsubishi Electronics ensures customer satisfaction with robust support and warranty options, emphasizing quality and reliability. In summary, the MUY-GE12NA, MUY-GE18NA, MUY-GE09NA, MUZ-GE12NA, and MUZ-GE18NA models stand out for their energy-efficient inverter technology, user-friendly controls, advanced air filtration, sleek design, and quiet operation, making them a smart choice for modern cooling and heating needs.