[P12 error]

Turn off the power.

Is there no connection error or

disconnection on connectors CN333 YES and CN334 of indoor unit P.C. board

(MCC-1570)?

Correct connection

of connector.

NO

Remove connectors CN333

and CN334 of indoor unit P.C. board

(MCC-1570).

Does the fan rotate without trouble when handling the fan with hands?

YES

Are resistance values

between phases at fan motor connector CN333 motor side of indoor P.C. board (MCC-1570) correct? ∗1

NO

Incorrect

CN333

CN334

Replace indoor fan motor.

Replace indoor fan motor.

Correct

∗1

•Are not coil windings between c (Red lead) and e (White lead), between e (White lead) and g (Black lead),

g (Black lead) and c (Red lead) opened or shorted?

→ The resistance should be the resistance value below.between

SM56, SM80 → Approx. 70 to 100Ω SM110, SM140 → Approx. 27 to 40Ω

• Is not grounded between cabinet and c, e, g. → It should be 10MΩ or more.

Is resistance value of

fan motor connector CN334 motor side Incorrect of indoor P.C. board

(MCC-1570) correct? ∗2

Replace indoor fan motor.

Correct

∗2

Resistance value confirmation of the fan motor position detection circuit

Is not status between c (Yellow lead) and d (Pink lead) opened or shorted?

→The resistance should be approx. 5k to 20kΩ.

Is output of

NO

indoor fan motor position

 

 

detection signal correct? ∗3

 

Replace indoor fan motor.

YES

∗3

Confirmation of the fan motor position detection signal

•Using a voltage tester, measure voltage between CN334 c and e on the indoor P.C. board

(MCC-1570) under condition that CN333 and CN334 are mounted and the power supply is turned on. → When rotating the fan slowly with hands, the pin voltage should shake between 0 and 5V.

•Between d and e: 5V

Check indoor P.C. board

(MCC-1570).

Defect → Replace

– 83 –

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Image 83
Toshiba RAV-SP1104AT-E, RAV-SM1404UT-E, RAV-SM1104UT-E, RAV-SP1404ATZG-E, RAV-SP1404AT-E, RAV-SM804UT-E P12 error, CN333 CN334
Page 82 Page 84

RAV-SP1104ATZG-E, RAV-SP1104ATZ-E, RAV-SP1404ATZ-E, RAV-SM804UT-E, RAV-SP1404AT-E specifications

Toshiba has long been a notable player in the air conditioning market, with a range of products designed to deliver effective cooling and heating solutions. Among its recent offerings are the RAV-SP1104AT-E, RAV-SM1404UT-E, RAV-SM1104UT-E, RAV-SP1104ATZ-E, and RAV-SP1404ATZ-E models. Each of these models is engineered for efficiency, performance, and user convenience.

The RAV-SP1104AT-E is designed for residential and commercial spaces alike, featuring advanced inverter technology. This model operates efficiently by adjusting compressor speed according to the required cooling load, resulting in reduced energy consumption and optimal performance. With a cooling capacity of 11 kW, it is suitable for medium to large spaces.

The RAV-SM1404UT-E model builds on this efficiency with enhanced features aimed at maximizing comfort. It includes a built-in Wi-Fi capability, allowing users to control the system remotely through a mobile app. This model boasts a high-energy efficiency rating, which translates into lower operating costs and a smaller environmental footprint.

Similarly, the RAV-SM1104UT-E emphasizes versatility and adaptability, adept at handling various climatic conditions. In addition to its robust cooling performance, it supports heating capabilities, making it an excellent choice for year-round use. The unit's quiet operation ensures comfort without the nuisance of disruptive noise, making it ideal for both residential and commercial settings.

The RAV-SP1104ATZ-E and RAV-SP1404ATZ-E models represent the pinnacle of Toshiba's innovation in multi-split systems. Both models utilize advanced refrigerant technology, ensuring rapid cooling and heating while minimizing energy loss. The RAV-SP1104ATZ-E offers a balanced performance with a focus on high efficiency, while the RAV-SP1404ATZ-E provides greater capacity, ideal for larger establishments requiring substantial climate control.

All these units feature Toshiba's cutting-edge technologies, including advanced filtration systems that improve indoor air quality by capturing dust, allergens, and other particulates. The robust design of these models ensures durability and longevity, making them a worthwhile investment for any property owner.

In summary, Toshiba’s RAV-SP1104AT-E, RAV-SM1404UT-E, RAV-SM1104UT-E, RAV-SP1104ATZ-E, and RAV-SP1404ATZ-E models reflect the brand's commitment to innovation and energy efficiency. These air conditioning solutions cater to a variety of needs while ensuring comfort, reduced environmental impact, and user-friendly operation.
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