Abbreviations | Heat Controller A-VMH18DC-1, A-VMH36QC-1 manual

Service ManualVMH SeriesHeat Controller, Inc.

8. Electronic control function

8.1 Abbreviations

T1: Indoor ambient temperature

T2: Coil temperature of indoor heat exchanger middle.

T2B: Coil temperature of indoor heat exchanger outlet.

T3: Coil temperature of outdoor heat exchanger

T4: Outdoor ambient temperature

T5: Compressor discharge temperature

Ts: Set point temperature.

8.2 Electric control working environment.

8.2.1Input voltage: 230V.

8.2.2Input power frequency:60Hz.

8.2.3Indoor fan normal working amperage. is less than 1A.

8.2.4Outdoor fan normal working amperage. is less than 1.5A.

8.2.5Four-way valve normal working amperage. is less than 1A.

8.2.6Swing motor: 12V DC.

8.3 Outdoor unit’s digital display

There is a digital display tube in outdoor PCB.

Digital display functions:

•In standby , the LED displays “- -”

•When compressor is operating, the LED displays the running frequency,

•In defrosting mode, The LED displays “dF” or alternatively displays between running frequency and “dF”(each displays 2s)

•In compressor pre-heating, The LED displays “- -”

•In protection or malfunction modes, the LED displays the associated error code or protection code.

8.4 Outdoor unit point check function

There is a check switch in outdoor PCB.

Push the switch SW1 to check the states of unit when the unit is running. The digital display will display the following each time the SW1 switch is preserved.

No.SW1	Display	Remark
Pressed
1	Indoor unit capacity demand code

2	Outdoor unit running mode code	Off:0, Cooling:1, Heating:2

3	Amendatory capacity demand code

4	Outdoor unit fan motor state	Off:0, Low speed:1, High speed:2

5	Evaporator outlet temp. for 1# indoor unit	Actual data is measured, however due to display limitations
		if the temp. is lower than -9 degrees, the digital display will
6	Evaporator outlet temp. for 2# indoor unit
6	Evaporator outlet temp. for 2# indoor unit	show “-9”. If the temp. is higher than 70 degrees, the digital

7	Evaporator outlet temp. for 3# indoor unit	display will show “70”. If the indoor unit is not connected, the
		digital display tube will show: “- -“.
8	Evaporator outlet temp. for 4# indoor unit	digital display tube will show: “- -“.
8	Evaporator outlet temp. for 4# indoor unit

9	Condenser pipe temp.

10	Ambient temp.

11	Compressor discharge temp.	Actual data is measured, however due to display limitations
		if the temp. is lower than 0 degrees, the digital display will
		show “0”. If the temp. is higher than 99 degrees, the digital
		display will show single digit and a tens digit. For example if
		the digital display shows “0.5”, it means the compressor

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.