Mitsubishi Electronics MUY-GE15NA Removing the inverter assembly, inverter P.C. board Photo

Page 41

 

OPERATING PROCEDURE

 

 

 

 

PHOTOS

 

 

 

 

 

 

 

2. Removing the inverter assembly, inverter P.C. board

Photo 3

 

 

 

 

 

 

 

 

 

 

 

 

(1)

Remove the cabinet and panels. (Refer to 1.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Screws of the

 

 

 

 

 

 

 

(2)

Disconnect the lead wire to the reactor and the following

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

relay panel

 

 

 

 

 

 

 

 

connectors:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

<Inverter P.C. board>

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CN721 (R.V. coil) (MUZ)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CN931, CN932 (Fan motor)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CN641 (Defrost thermistor (MUZ) and discharge tempera-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ture thermistor)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CN643 (Ambient temperature thermistor)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CN644 (Outdoor heat exchanger temperature thermistor)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CN724 (LEV)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(3)

Remove the compressor connector (CN61).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(4)

Remove the screws fixing the relay panel. (Photo 3)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(5)

Remove the inverter assembly. (Photo 4)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(6)

Remove the screw of the ground wire and screw of the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T.B.support. (Photo 4)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(7)

Remove the relay panel from the inverter assembly.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(8)

Remove the inverter P.C. board from the relay panel.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Photo 4 (Inverter assembly)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Inverter

 

 

Heat sink

 

 

 

 

Screw of the

 

 

 

P.C. board

 

 

 

T.B.support

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3. Removing R.V. coil (MUZ)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T.B.support

(1)

Remove the cabinet and panels. (Refer to 1.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(2)

Disconnect the following connectors:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

<Inverter P.C. board>

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CN721 (R.V. coil)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(3)

Remove the R.V. coil. (Photo 5)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Screw of the

 

 

 

Relay panel

 

 

 

ground wire

 

 

 

 

 

Photo 5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4. Removing the discharge temperature thermistor,

 

 

 

 

 

 

R.V. coil (MUZ)

defrost thermistor, outdoor heat exchanger tempera-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ture thermistor and ambient temperature thermistor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(1)

Remove the cabinet and panels. (Refer to 1.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(2)

Disconnect the lead wire to the reactor and the following

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

connectors:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

<Inverter P.C. board>

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CN641 (Defrost thermistor (MUZ) and discharge tempera-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ture thermistor)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CN643 (Ambient temperature thermistor)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CN644 (Outdoor heat exchanger temperature thermistor)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(3)

Pull out the discharge temperature thermistor from its hold-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

er. (Photo 5)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(4)

Pull out the defrost thermistor from its holder. (Photo 6)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(5)

Pull out the outdoor heat exchanger temperature thermistor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

from its holder. (Photo 6)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(6)

Pull out the ambient temperature thermistor from its holder.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Discharge temperature thermistor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

41

Image 41
Contents Outdoor Unit Technical Changes Part Names and Functions MUZ-GE09NA MUY-GE09NA MUZ-GE12NA MUY-GE12NA SpecificationRefrigerant charge R410A Lb oz MUZ-GE15NA MUY-GE15NA MUZ-GE18NA MUY-GE18NAARI Operating RangeSeer HspfUnit inch Outlines and DimensionsWiring Diagram MUZ-GE15NA MUY-GE15NA MUZ-GE18NA MUY-GE18NA LEV Refrigerant System DiagramØ3/8 GE12NA Ø1/2 GE15NAMUZ-GE09/12/15NA MUY-GE09/12/15NA GE15 MUZPerformance Data DataMUZ-GE12NAMUZ-GE15NA MUY-GE12NAMUY-GE15NA Performance Curve CoolingMUZ-GE09NA MUY-GE09NA Heating MUZ MUZ-GE18NA MUY-GE18NAMUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NAMUZ-GE15NA MUY-GE15NA Condensing Pressure CoolingMUZ-GE12NA MUY-GE12NA MUZ-GE09NA MUZ-GE15NA MSZ-GE09NA MSZ-GE12NA MSY-GE09NA MSY-GE12NA Standard Operation DataSHF MSZ-GE09NA, MSY-GE09NA MSZ-GE12NA, MSY-GE12NAMSZ-GE15NA, MSY-GE15NA MSZ-GE18NA, MSY-GE18NA MSZ-GE15NA MSZ-GE18NA MSY-GE15NA MSY-GE18NAMUZ-GE15NA MUZ-GE18NA MUZ-GE15NA MUZ-GE18NA MUY-GE15NA MUY-GE18NACorrection of Cooling capacity HOW to Operate FIXED-FREQUENCY Operation Test run operationOutdoor FAN Motor Control Actuator ControlR.V. Coil Control MUZ Relation Between Main Sensor and ActuatorTroubleshooting Service FunctionsChange in Defrost Setting MUZ PRE-HEAT Control SettingFailure Mode Recall Function Operational procedure LED Outdoor unit failure mode tableTroubleshooting Check Table GE09/12 GE15 GE18 Trouble Criterion of Main PartsGE09 GE12 GE15/18 Check of open phase How to check inverter/compressorTroubleshooting Flow Check of compressorCheck of compressor operation time Check of compressor windingCheck of compressor start failure BLK WHT BLK RED WHT REDUnit operates Heat mode even if it is set to Cool mode Unit operates Cool mode even if it is set to Heat modeCheck of outdoor thermistors Check of R.V. coil MUZCheck of outdoor fan motor MUZ-GE09/12/15NA MUY-GE09/12/15NACheck of power supply Check of LEV Expansion valve Emergency Operation Check of inverter P.C. boardHow to check miswiring and serial signal error Electromagnetic noise enters into TV sets or radios LED LEV Test Point Diagram and VoltageInverter P.C. board LED Removing the cabinet Photo Disassembly InstructionsPhoto 4 Inverter assembly Removing the inverter assembly, inverter P.C. board PhotoPhoto Removing the discharge temperature thermistor Removing R.V. coil MUZRemoving the compressor and 4-way valve Removing outdoor fan motor PhotoMUZ-GE18NA MUY-GE18NA Operating Procedure Photos Photo5 Removing R.V. coilRemoving outdoor fan motor Page Page Made in Japan New publication, effective JulDistributed in Jul . No. OBH 549

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.