J Check of power supply

Disconnect the connector (CN61) between compressor and intelligent power module.

Turn ON power supply and press EMERGENCY OPERATION switch.

Does The upper lamp of

OPERATION INDICATOR lamp on No the indoor unit light up?

Yes

Is there bus-bar voltage 260-325 VDC between DB61 (+) and DB61 (

–) on the inverter P.C. board? Yes (Refer to 10-6.1.)

No

Check the electric parts in main circuit.

Rectify indoor/outdoor connecting wire.

Yes

Is there voltage 208/230 VAC between the indoor terminal block S1 and S2?

Dose LED on the inverter P.C. board light up or flash? (Refer to 10-6.1.)

Yes

If light up, OK.

If flash, refer to 10-3.

Replace the indoor No electronic control P.C.

board.

Replace the inverter No P.C. board.

260-325 VDC

DB61

Inverter P.C. board (Solder side)

33

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Mitsubishi Electronics MUY-GE15NA, MUY-GE12NA, MUY-GE18NA, MUY-GE09NA, MUZ-GE12NA, MUZ-GE15NA, MUZ-GE18NA Check of power supply

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.