Service Manual

VMH Series

Heat Controller, Inc.

 

 

 

9.3.1.3 Zero-crossing signal error

Check if the connections and

 

 

 

No

power supply

are normal?

 

 

 

 

 

Yes

Indoor PCB is defective.

Replace indoor PCB.

Correct the connections. Turn on the unit when the power supply is within 90-110% of rated voltage on unit’s rating plate.

9.3.1.4 Indoor fan speed has been out of control(DC fan motor)

Shut off the power supply and turn it on 5 seconds later. Is it still displaying the error code?

Yes

Shut off the power supply, rotate the fan by hand. Does it rotate freely with any rubbing/obstructions?

Yes

Check the wires of fan motor. Are all the connections good?

Yes

Check the voltage between port 1 and 6 of fan motor connector, is it 310V?

No

No The unit operates normally.

 

 

 

Replace indoor fan

No

 

 

 

 

motor.

 

 

 

 

 

 

 

No Correct the connections

per wiring diagram.

Yes

Replace indoor main PCB. Is it still displaying the error code?

4

1

No

5

6

3

2

The unit operates normally.

DC motor voltage input and output

NO.

Color

Signal

Voltage

 

 

 

 

1

Red

VDC

310V

 

 

 

 

2

---

---

---

 

 

 

 

3

White

Vcc

15V

 

 

 

 

4

Blue

FG

0.3V

 

 

 

 

5

Yellow

Vsp

0-7.5V

 

 

 

 

6

Black

GND

0V

 

 

 

 

30

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Image 30
Heat Controller A-VMH36QC-1, A-VMH27TC-1 Zero-crossing signal error, Indoor fan speed has been out of controlDC fan motor

A-VMH18DC-1, A-VMH36QC-1, A-VMH27TC-1 specifications

The Heat Controller A-VMH series, consisting of models A-VMH27TC-1, A-VMH36QC-1, and A-VMH18DC-1, represents a sophisticated range of advanced heating and cooling systems designed for residential and commercial applications. These units are engineered to provide efficient climate control, ensuring optimal comfort throughout the year.

One of the standout features of the A-VMH series is its energy efficiency. With advanced inverter technology, these units adjust their power consumption based on the heating or cooling demand, ensuring minimal energy wastage. This not only contributes to lower energy bills but also reduces the carbon footprint, making these systems an environmentally friendly choice.

Each model in the A-VMH series comes equipped with a multi-stage filtration system designed to improve indoor air quality. The filters capture dust, allergens, and other particulate matter, ensuring that the air circulated through the living spaces is clean and fresh. This is particularly beneficial for households with allergy sufferers or respiratory issues.

The A-VMH27TC-1 model stands out for its compact design, making it ideal for smaller spaces without compromising on performance. It offers a cooling capacity of 27,000 BTU and is perfect for apartments or cozy living areas. The A-VMH36QC-1, on the other hand, provides a robust 36,000 BTU cooling capacity, making it suitable for larger rooms or commercial spaces. Its advanced heat pump technology allows for efficient heating even in colder climates. Lastly, the A-VMH18DC-1 model balances functionality and space-saving design, providing 18,000 BTUs for medium-sized areas.

All models are equipped with smart connectivity options, allowing users to control the temperature settings, adjust modes, and monitor energy consumption through mobile apps or smart home systems. This modern convenience provides users with the flexibility to maintain comfort according to their schedules and preferences.

Durability is also a hallmark of the A-VMH series. Each unit is built with high-quality materials and components, ensuring longevity and reliable performance. Moreover, the whisper-quiet operation of these units enhances the overall comfort, allowing users to enjoy their spaces without disruptive noise.

In summary, the Heat Controller A-VMH27TC-1, A-VMH36QC-1, and A-VMH18DC-1 are ideal choices for anyone seeking efficient, reliable, and smart climate control solutions. With their combination of energy efficiency, advanced filtration, smart capabilities, and robust design, these units meet the diverse needs of modern living and ensure lasting comfort in any environment.