Heat Controller A-VMH18DC-1 Service User manual

Heat Controller, Inc. • 1900 Wellworth Ave. • Jackson, MI 49203 • (517)787-2100 • www.heatcontroller.com

SERVICE MANUAL

Inverter Flex Multi-Zone

Ductless Mini Split

Outdoor Section

A-VMH18DC-1

A-VMH27TC-1

A-VMH36QC-1

Service Manual VMH SerieS Heat Controller, Inc.

CONTENTS

1.General Information of Outdoor Units........................................................... 3

2. Features........................................................................................................... 4

3. Dimensions ..................................................................................................... 5

4. Wiring Diagram............................................................................................... 6

5. Refrigeration Cycle Diagram ......................................................................... 8

6. Indoor unit Combinations............................................................................ 10

7. Installation Details........................................................................................ 11

8. Electronic Control Function ........................................................................ 20

9. Troubleshooting ........................................................................................... 25

Heat Controller, Inc. VMH SerieS Service Manual

1. General information of Outdoor Units

Model name Dimension mm(in) Compressor

A-VMH18DC-1 845x320x700(33.3x12.6x27.6) DA130S1C-20FZ

A-VMH27TC-1 845x320x700(33.3x12.6x27.6) DA150S1C-20FZ

A-VMH36QC-1 990x345x965(39x13.6x38) TNB306FPGMC-L

Service Manual VMH SerieS Heat Controller, Inc.

2．Features

The hydrophilic fin is corrosion resistant and improves heating efficiency in heat mode by absorbing the water on

its surface and by spreading the water instead of forming water droplets.

Operates only in heating mode except during defrosting.

Compressor crankcase heater

It protects the valves and prevents water from dripping in the cabinet.

Outdoor unit

Power relay control

Hydrophilic aluminum fin

Anti-rust cabinet

Valve protection cover

4 way valve control

Low noise air flow system

Discharge pipe temperature protection

Heat Controller, Inc. VMH SerieS Service Manual

3. Dimensions

mm(in)

Model W D H W1 A B

A-VMH18DC-1 845((33.3) 320(12.6) 700(27.6) 908(35.7) 560(22) 335(13.2)

A-VMH24TC-1

A-VMH36QC-1 990(39) 345(13.6) 965(38) 1075(42.3) 624(24.6) 366(14.4)

Service Manual VMH SerieS Heat Controller, Inc.

4. Wiring Diagram

4.1 A-VMH18DC-1

4.2 A-VMH27TC-1

Heat Controller, Inc. VMH SerieS Service Manual

4.3 A-VMH36QC-1

Service Manual VMH SerieS Heat Controller, Inc.

5. Refrigeration Cycle Diagram

8.1 Refrigeration circuit drawing of inverter dual zone: A-VMH18DC-1

LIQUID VALVE A

GAS VALVE A

HEAT

EXCHANGE

(EVAPORATOR)

HEAT

EXCHANGE

(CONDENSER)

Compressor

4-WAY VALVE

COOLING

HEATING

T2 Evaporator

temp. sensor

T1 Room

temp. sensor

Condenser

temp. sensor

T5 Discharge

temp. sensor

T4 Ambient

temp. sensor

INDOOR OUTDOOR

EXV A CAPILIARY A

CHECK VALVE

CAPILIARY TUBE

EXV B CAPILIARY B

LIQUID VALVE B

GAS VALVE B

Accumulator

5.2 Refrigeration circuit drawing of inverter tri-zone: A-VMH27TC-1

LIQUID VALVE A

GAS VALVE A

HEAT

EXCHANGE

(EVAPORATOR)

HEAT

EXCHANGE

(CONDENSER)

Compressor

4-WAY VALVE

COOLING

HEATING

T2 Evaporator

temp. sensor

T1 Room

temp. sensor

Condenser

temp. sensor

T5 Discharge

temp. sensor

T4 Ambient

temp. sensor

INDOOR OUTDOOR

EXV A CAPILIARY A

CHECK VALVE

CAPILIARY TUBE

EXV B CAPILIARY B

LIQUID VALVE B

GAS VALVE B

EXV C CAPILIARY C

LIQUID VALVE C

GAS VALVE C

Accumulator

Heat Controller, Inc. VMH SerieS Service Manual

8.3 Refrigeration circuit drawing of inverter Quad-zone: A-VMH36QC-1

LIQUID VALVE A

GAS VALVE A

HEAT

EXCHANGE

(EVAPORATOR)

HEAT

EXCHANGE

(CONDENSER)

Compressor

4-WAY VALVE

COOLING

HEATING

T2 Evaporator

temp. sensor

T1 Room

temp. sensor

Condenser

temp. sensor

T5 Discharge

temp. sensor

T4 Ambient

temp. sensor

INDOOR OUTDOOR

EXV A CAPILIARY A

CHECK VALVE

CAPILIARY TUBE

EXV B CAPILIARY B

LIQUID VALVE B

GAS VALVE B

EXV C CAPILIARY C

LIQUID VALVE C

GAS VALVE C

EXV D CAPILIARY D

LIQUID VALVE D

GAS VALVE D

Accumulator

High pressure

switch

Low pressure

switch

Service Manual VMH SerieS Heat Controller, Inc.

6. Indoor units combination

NOTE: The total capacity of indoor air handlers can not exceed the nominal capacity of the outdoor unit.

The minimum quantity of indoor air handlers is one on any outdoor unit, whether it is a dual, tri, or quad

zone.

6.1 Indoor unit combinations for A-VMH18DC-1

Comb.

Combinations

Unit A

Unit B

Dual(1x1)

—

12k

—

18k

—

Dual (1x2)

12k

6.2Indoor unit combinations A-VMH27TC-1

Comb.

Combinations

Unit A

Unit B

Unit C

TRI (1x1)

—

12k

—

18k

—

TRI (1x2)

—

12k

—

18k

—

12k

—

TRI (1x3)

6.3Indoor unit combinations A-VMH36QC-1

Comb.

Combinations

Unit A

Unit B

Unit C

Unit D

QUA (1x1)

—

12k

—

18k

—

QUA (1x2)

—

12k

—

18k

—

12k

—

12k

18k

—

18k

—

QUA (1x3)

—

12k

—

18k

—

12k

—

12k

—

QUA(1x4)

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