Sanyo CMH2472 Technical & Service Manual

IMPORTANT

These air conditioners employ new

refrigerant R410A.

Pay special attention when

servicing the unit.

●

Wall mounted type

KMHS0772

KMHS0972

KMHS1272

KMHS1872

KMHS2472

< Applicable Indoor Units >

TECHNICAL & SERVICE MANUAL

OUTDOOR UNIT : CMH1972

CMH2472

CMH3172

DC INVERTER MULTI-SYSTEM AIR CONDITIONER

FILE NO.

Destination: North America

Product Code No.

1 852 330 30

1 852 330 31

1 852 330 32

REFERENCE NO.

SM700660-04

Capacity at 230V

19,100 BTU/h

23,200 BTU/h

30,600 BTU/h

Outdoor Model No.

CMH1972

CMH2472

CMH3172

NOTE

CMH1972

CMH2472

CMH3172

For details about the combination, refer to

"Unit Combination Table" in the Appendix

of this manual.

When Wiring

ELECTRICAL SHOCK CAN CAUSE

SEVERE PERSONAL INJURY OR DEATH.

ONLY A QUALIFIED, EXPERIENCED

ELECTRICIAN SHOULD ATTEMPT TO

WIRE THIS SYSTEM.

SPECIAL PRECAUTIONS

This symbol refers to a hazard or

unsafe practice which can result

in severe personal injury or death.

This symbol refers to a hazard

or unsafe practice which can

result in personal injury or

product or property damage.

CAUTION

WARNING

Important!

Please Read Before Starting

This air conditioning system meets strict safety and operating

standards. As the installer or service person, it is an

important part of your job to install or service the system so it

operates safely and efficiently.

For safe installation and trouble-free operation, you must:

Carefully read this instruction booklet before beginning.

Follow each installation or repair step exactly as shown.

Observe all local, state, and national electrical codes.

Pay close attention to all warning and caution notices given

in this manual.

If Necessary, Get Help

These instructions are all you need for most installation

sites and maintenance conditions. If you require help for

a special problem, contact our sales/service outlet or

your certified dealer for additional instructions.

In Case of Improper Installation

The manufacturer shall in no way be responsible for

improper installation or maintenance service, including

failure to follow the instructions in this document.

Do not supply power to the unit until all wiring and tubing

are completed or reconnected and checked.

Highly dangerous electrical voltages are used in this

system. Carefully refer to the wiring diagram and these

instructions when wiring. Improper connections and

inadequate grounding can cause accidental injury or death.

Ground the unit following local electrical codes.

Connect all wiring tightly. Loose wiring may cause

overheating at connection points and a possible fire

hazard.

Install a protective leakage breaker depending on the

installation location (especially a damp or humid

location). If a leakage breaker is not installed, electric

shock can occur.

When Transporting

Be careful when picking up and moving the indoor and

outdoor units. Get a partner to help, and bend your knees

when lifting to reduce strain on your back. Sharp edges or thin

aluminum fins on the air conditioner can cut your fingers.

When Installing

In a Ceiling or Wall

Make sure the ceiling/wall is strong enough to hold the unit’s

weight. It may be necessary to construct a strong wood or

metal frame to provide added support.

In a Room

Properly insulate any tubing run inside a room to prevent

"sweating" that can cause dripping and water damage to walls

and floors.

In Moist or Uneven Locations

Use a raised concrete pad or concrete blocks to provide a

solid, level foundation for the outdoor unit. This prevents water

damage and abnormal vibration.

In an Area with High Winds

Securely anchor the outdoor unit down with bolts and a metal

frame. Provide a suitable air baffle.

In a Snowy Area (for Heat Pump-type Systems)

Install the outdoor unit on a raised platform that is higher than

drifting snow. Provide snow vents.

When Connecting Refrigerant Tubing

Use the flare method for connecting tubing.

Apply refrigerant lubricant to the matching surfaces of the

flare and union tubes before connecting them, then tighten

the nut with a torque wrench for a leak-free connection.

Check carefully for leaks before starting the test run.

When Servicing

Tu rn the power off at the main power box (mains) before

opening the unit to check or repair electrical parts and

wiring.

Keep your fingers and clothing away from any moving parts.

Clean up the site after you finish, remembering to check

that no metal scraps or bits of wiring have been left inside

the unit being serviced.

Others

Ventilate any enclosed areas when installing or testing the

refrigeration system. Escaped refrigerant gas, on contact

with fire or heat, can produce dangerously toxic gas.

Confirm upon completing installation that no refrigerant gas

is leaking. If escaped gas comes in contact with a stove,

gas water heater, electric room heater or other heat source,

it can produce dangerously toxic gas.

•

2

Table of Contents

4

5

6

12

15

16

19

22

36

39

42

45

50

53

54

55

56

60

61

62

63

64

66

67

A-1

A-2

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Page

APPLICABLE INDOOR UNITS

1. OPERATING RANGE

2. SPECIFICATIONS

2-1. Unit Specifications

2-2. Major Component Specifications

2-3. Other Component Specifications

3. DIMENSIONAL DATA

4. REFRIGERANT FLOW DIAGRAM

4-1. Refrigerant Flow Diagram

5. PERFORMANCE DATA

5-1. Temperature Charts

5-2. Cooling Capacity

5-3. Heating Capacity

6. ELECTRICAL DATA

6-1. Electric Wiring Diagrams

7. FUNCTIONS

7-1. Explanation of Functions

7-2. Protective Functions

8. TROUBLESHOOTING

8-1. Precautions before Performing Inspection or Repair

8-2. Trouble Diagnosis by Error Monitop Lamps

8-3. Checking the Outdoor System

8-4. Trouble Diagnosis of Each Part

8-5. Trouble Diagnosis of Fan Motor

9. REFRIGERANT R410A:

SPECIAL PRECAUTIONS WHEN SERVICING UNIT

9-1. Characteristics of New Refrigerant R410A

9-2. Checklist before Servicing

9-3. Tools Specifically for R410A

9-4. Tubing Installation Procedures

9-5. In Case of Compressor Malfunction

9-6. In Case Refrigerant is Leaking

9-7. Charging Additional Refrigerant

9-8. Retro-Fitting Existing Systems

APPENDIX A INSTALLATION INSTRUCTIONS

APPENDIX B UNIT COMBINATION TABLES

3

APPLICABLE INDOOR UNITS

CMH1972

CMH2472

CMH3172

Multi-Outdoor Unit

Indoor Unit

3-Room

4-Room

KMHS0772

YES

NO

YES

KMHS0972 KMHS1272 KMHS1872 KMHS2472

NOTE

The table lists the wall-mounted type of indoor units as representative models.

4

95 °F D.B. / 71 °F W.B.

67 °F D.B. / 57 °F W.B.

80 °F D.B. / 67 °F W.B.

_

D.B. /

_

W.B.

1. OPERATING RANGE

Maximum

Minimum

Maximum

Minimum

115 °F D.B.

67 °F D.B.

75 °F D.B. / 65 °F W.B.

0 °F D.B.

Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp.

Cooling

Heating

5

2. SPECIFICATIONS

2-1. Unit Specifications

Outdoor Unit CMH1972

Indoor Unit KMHS0972

× 3

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Compressor

Refrigerant / Amount charged at shipment Ib. (g)

Refrigerant Control

( 11,600 to 24,800 )

( 3.40 to 7.30 )

6.7

1,500

7.7

1,735

19,100

5.60

24,800

7.30

( 9,800 to 19,100 )

( 2.90 to 5.60 )

Shipping Volume

Cooling Heating

16,300

2,800

Cooling Heating

Net

Shipping

Package Dimensions

Weight

Height

× Width × Depth

Height

× Width × Depth

Ib. (kg)

cu.ft (m

3

)

(mm)

inch

(mm)

230V Single-Phase 60Hz

inch

-

187 to 253

Dimensions & Weight (Outdoor Unit)

Refrigerant Tubing Connections

Unit Dimensions

Electrical Rating

Sensible Capacity

Latent Capacity

WPower Input

V

A

Available Voltage Range

Running Amperes

Narrow tube

Wide tube

Refrigerant inch (mm)

Tube Diameter inch (mm)

143.3

152.1

12.71

(65.0)

(69.0)

(0.36)

(740

× 900 × 320)

33-27/32

× 40-5/8 × 16-1/4

(860

× 1,032 × 413)

29-1/8

× 35-7/16 × 12-19/32

1/4 (6.35)

× 3

3/8 (9.52)

× 3

ft. (m)Max. allowable tubing length per unit

Flare Type

82 (25)

R410A / 6.17 (2,800)

Electric Expansion Valve

DC Twin Rotary (Inverter)

dB-A

Fan Speeds Auto (Hi, Me, Lo)

Control Microprocessor

Features (Outdoor Unit)

HSPF

Compressor Locked Rotor Amperes

BTU/Wh

BTU/h

Performance

- 7.7

%Power Factor 98 98

A 14.5

Voltage Rating

BTU/h

kW

Total Capacity

BTU/h

SEER BTU/Wh 13 -

3-Room Multi Outdoor UnitType

3Number of Connectable Indoor Units

3Number of Operatable Indoor Units

1,707 (2,900) 1,707 (2,900)Air Circulation (High) ft

3

/min (m

3

/h)

Fuse or Circuit Breaker Capacity A 20

Operation Sound (High) Cool/Heat 50 / 52

Remarks:

1. The Values shown in performance section and electrical rating section above are based on the following unit combination.

For other combination unit, please refer to the "Unit Combination Tables" in this manual.

Indoor Unit : KMHS0972 3units Outdoor Unit : CMH1972 1unit

2. Rating conditions are: Cooling : Indoor air temp. 80°F D.B./ 67°F W.B Heating : Indoor air temp. 70°F D.B.

Outdoor air temp. 95°F D.B./ 75°F W.B. Outdoor air temp. 47°F D.B./ 43°F W.B.

< 230V >

6

Outdoor Unit CMH1972

Indoor Unit KMHS0972

× 3

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Compressor

Refrigerant / Amount charged at shipment Ib. (g)

Refrigerant Control

( 11,600 to 24,800 )

( 3.40 to 7.30 )

7.4

1,500

8.5

1,735

19,100

5.60

24,800

7.30

( 9,800 to 19,100 )

( 2.90 to 5.60 )

Shipping Volume

Cooling Heating

16,300

2,800

Cooling Heating

Net

Shipping

Package Dimensions

Weight

Height

× Width × Depth

Height

× Width × Depth

Ib. (kg)

cu.ft (m

3

)

(mm)

inch

(mm)

208V Single-Phase 60Hz

inch

-

187 to 253

Dimensions & Weight (Outdoor Unit)

Refrigerant Tubing Connections

Unit Dimensions

Electrical Rating

Sensible Capacity

Latent Capacity

WPower Input

V

A

Available Voltage Range

Running Amperes

Narrow tube

Wide tube

Refrigerant inch (mm)

Tube Diameter inch (mm)

143.3

152.1

12.71

(65.0)

(69.0)

(0.36)

(740

× 900 × 320)

33-27/32

× 40-5/8 × 16-1/4

(860

× 1,032 × 413)

29-1/8

× 35-7/16 × 12-19/32

1/4 (6.35)

× 3

3/8 (9.52)

× 3

ft. (m)Max. allowable tubing length per unit

Flare Type

82 (25)

R410A / 6.17 (2,800)

Electric Expansion Valve

DC Twin Rotary (Inverter)

Fan Speeds Auto (Hi, Me, Lo)

Control Microprocessor

Features (Outdoor Unit)

HSPF

Compressor Locked Rotor Amperes

BTU/Wh

BTU/h

Performance

- 7.7

%Power Factor 98 98

A 14.5

Voltage Rating

BTU/h

kW

Total Capacity

BTU/h

SEER BTU/Wh 13 -

3-Room Multi Outdoor UnitType

3Number of Connectable Indoor Units

3Number of Operatable Indoor Units

1,707 (2,900) 1,707 (2,900)Air Circulation (High) ft

3

/min (m

3

/h)

Fuse or Circuit Breaker Capacity A 20

Operation Sound (High) Cool/Heat 50 / 52

Remarks:

1. The Values shown in performance section and electrical rating section above are based on the following unit combination.

For other combination unit, please refer to the "Unit Combination Tables" in this manual.

Indoor Unit : KMHS0972 3units Outdoor Unit : CMH1972 1unit

2. Rating conditions are: Cooling : Indoor air temp. 80°F D.B./ 67°F W.B Heating : Indoor air temp. 70°F D.B.

Outdoor air temp. 95°F D.B./ 75°F W.B. Outdoor air temp. 47°F D.B./ 43°F W.B.

< 208V >

dB-A

7

Outdoor Unit CMH2472

Indoor Unit KMHS0972

× 3

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Compressor

Refrigerant / Amount charged at shipment Ib. (g)

Refrigerant Control

( 11,600 to 29,200 )

( 3.40 to 8.60 )

9.0

2,040

10.1

2,270

23,200

6.80

29,200

8.60

( 9,800 to 23,200 )

( 2.90 to 6.80 )

Shipping Volume

Cooling Heating

Net

Shipping

Package Dimensions

Weight

Height

× Width × Depth

Height

× Width × Depth

Ib. (kg)

cu.ft (m

3

)

(mm)

inch

(mm)

230V Single-Phase 60Hz

inch

-

187 to 253

Dimensions & Weight (Outdoor Unit)

Refrigerant Tubing Connections

Unit Dimensions

Electrical Rating

Sensible Capacity

Latent Capacity

WPower Input

V

A

Available Voltage Range

Running Amperes

Narrow tube

Wide tube

Refrigerant inch (mm)

Tube Diameter inch (mm)

143.3

152.1

12.71

(65.0)

(69.0)

(0.36)

(740

× 900 × 320)

33-27/32

× 40-5/8 × 16-1/4

(860

× 1,032 × 413)

29-1/8

× 35-7/16 × 12-19/32

1/4 (6.35)

× 4

3/8 (9.52)

× 3 + 1/2 (12.7) × 1

ft. (m)Max. allowable tubing length per unit

Flare Type

82 (25)

R410A / 6.17 (2,800)

Electric Expansion Valve

DC Twin Rotary (Inverter)

Fan Speeds Auto (Hi, Me, Lo)

Control Microprocessor

Features (Outdoor Unit)

HSPF

Compressor Locked Rotor Amperes

BTU/Wh

BTU/h

Performance

- 7.7

%Power Factor 98 98

A 14.5

Voltage Rating

BTU/h

kW

Total Capacity

BTU/h

SEER BTU/Wh 13 -

4-Room Multi Outdoor UnitType

4Number of Connectable Indoor Units

3Number of Operatable Indoor Units

1,707 (2,900) 1,707 (2,900)Air Circulation (High) ft

3

/min (m

3

/h)

Fuse or Circuit Breaker Capacity A 20

Operation Sound (High) Cool/Heat 50 / 52

Remarks:

1. The Values shown in performance section and electrical rating section above are based on the following unit combination.

For other combination unit, please refer to the "Unit Combination Tables" in this manual.

Indoor Unit : KMHS0972 3units Outdoor Unit : CMH2472 1unit

2. Rating conditions are: Cooling : Indoor air temp. 80°F D.B./ 67°F W.B Heating : Indoor air temp. 70°F D.B.

Outdoor air temp. 95°F D.B./ 75°F W.B. Outdoor air temp. 47°F D.B./ 43°F W.B.

< 230V >

19,600

3,600

dB-A

8

Outdoor Unit CMH2472

Indoor Unit KMHS0972

× 3

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Compressor

Refrigerant / Amount charged at shipment Ib. (g)

Refrigerant Control

( 11,600 to 29,200 )

( 3.40 to 8.60 )

10.0

2,040

11.1

2,270

23,200

6.80

29,200

8.60

( 9,800 to 23,200 )

( 2.90 to 6.80 )

Shipping Volume

Cooling Heating

19,600

3,600

Cooling Heating

Net

Shipping

Package Dimensions

Weight

Height

× Width × Depth

Height

× Width × Depth

Ib. (kg)

cu.ft (m

3

)

(mm)

inch

(mm)

208V Single-Phase 60Hz

inch

-

187 to 253

Dimensions & Weight (Outdoor Unit)

Refrigerant Tubing Connections

Unit Dimensions

Electrical Rating

Sensible Capacity

Latent Capacity

WPower Input

V

A

Available Voltage Range

Running Amperes

Narrow tube

Wide tube

Refrigerant inch (mm)

Tube Diameter inch (mm)

143.3

152.1

12.71

(65.0)

(69.0)

(0.36)

(740

× 900 × 320)

33-27/32

× 40-5/8 × 16-1/4

(860

× 1,032 × 413)

29-1/8

× 35-7/16 × 12-19/32

1/4 (6.35)

× 4

3/8 (9.52)

× 3 + 1/2 (12.7) × 1

ft. (m)Max. allowable tubing length per unit

Flare Type

82 (25)

R410A / 6.17 (2,800)

Electric Expansion Valve

DC Twin Rotary (Inverter)

Fan Speeds Auto (Hi, Me, Lo)

Control Microprocessor

Features (Outdoor Unit)

HSPF

Compressor Locked Rotor Amperes

BTU/Wh

BTU/h

Performance

- 7.7

%Power Factor 98 98

A 14.5

Voltage Rating

BTU/h

kW

Total Capacity

BTU/h

SEER BTU/Wh 13 -

4-Room Multi Outdoor UnitType

4Number of Connectable Indoor Units

3Number of Operatable Indoor Units

1,707 (2,900) 1,707 (2,900)Air Circulation (High) ft

3

/min (m

3

/h)

Fuse or Circuit Breaker Capacity A 20

Operation Sound (High) Cool/Heat 50 / 52

Remarks:

1. The Values shown in performance section and electrical rating section above are based on the following unit combination.

For other combination unit, please refer to the "Unit Combination Tables" in this manual.

Indoor Unit : KMHS0972 3units Outdoor Unit : CMH2472 1unit

2. Rating conditions are: Cooling : Indoor air temp. 80°F D.B./ 67°F W.B Heating : Indoor air temp. 70°F D.B.

Outdoor air temp. 95°F D.B./ 75°F W.B. Outdoor air temp. 47°F D.B./ 43°F W.B.

< 208V >

dB-A

9

Outdoor Unit CMH3172

Indoor Unit KMHS0972

× 4

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Compressor

Refrigerant / Amount charged at shipment Ib. (g)

Refrigerant Control

( 11,600 to 32,000 )

( 3.40 to 9.40 )

12.3

2,800

10.3

2,350

30,600

9.00

32,000

9.40

( 9,800 to 30,600 )

( 2.90 to 9.00 )

Shipping Volume

Cooling Heating

25,800

4,800

Cooling Heating

Net

Shipping

Package Dimensions

Weight

Height

× Width × Depth

Height

× Width × Depth

Ib. (kg)

cu.ft (m

3

)

(mm)

inch

(mm)

230V Single-Phase 60Hz

inch

-

187 to 253

Dimensions & Weight (Outdoor Unit)

Refrigerant Tubing Connections

Unit Dimensions

Electrical Rating

Sensible Capacity

Latent Capacity

WPower Input

V

A

Available Voltage Range

Running Amperes

Narrow tube

Wide tube

Refrigerant inch (mm)

Tube Diameter inch (mm)

180.8

189.6

15.18

(82.0)

(86.0)

(0.43)

(890

× 900 × 320)

39-3/4

× 40-5/8 × 16-1/4

(1,010

× 1,032 × 413)

35-1/32

× 35-7/16 × 12-19/32

1/4 (6.35)

× 4

3/8 (9.52)

× 2 + 1/2 (12.7) × 2

ft. (m)Max. allowable tubing length per unit

Flare Type

100 (30.5)

R410A / 8.38 (3,800)

Electric Expansion Valve

DC Twin Rotary (Inverter)

Fan Speeds Auto (Hi, Me, Lo)

Control Microprocessor

Features (Outdoor Unit)

HSPF

Compressor Locked Rotor Amperes

BTU/Wh

BTU/h

Performance

- 7.7

%Power Factor 99 99

A 17.0

Voltage Rating

BTU/h

kW

Total Capacity

BTU/h

SEER BTU/Wh 16 -

4-Room Multi Outdoor UnitType

4Number of Connectable Indoor Units

4Number of Operatable Indoor Units

1,942 (3,300) 1,807 (3,070)Air Circulation (High) ft

3

/min (m

3

/h)

Fuse or Circuit Breaker Capacity A 20

Operation Sound (High) Cool/Heat 53 / 52

Remarks:

1. The Values shown in performance section and electrical rating section above are based on the following unit combination.

For other combination unit, please refer to the "Unit Combination Tables" in this manual.

Indoor Unit : KMHS0972 4units Outdoor Unit : CMH3172 1unit

2. Rating conditions are: Cooling : Indoor air temp. 80°F D.B./ 67°F W.B Heating : Indoor air temp. 70°F D.B.

Outdoor air temp. 95°F D.B./ 75°F W.B. Outdoor air temp. 47°F D.B./ 43°F W.B.

< 230V >

dB-A

10

Outdoor Unit CMH3172

Indoor Unit KMHS0972

× 4

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Compressor

Refrigerant / Amount charged at shipment Ib. (g)

Refrigerant Control

( 11,600 to 32,000 )

( 3.40 to 9.40 )

13.6

2,800

11.4

2,350

28,600

8.40

32,000

9.40

( 9,800 to 28,600 )

( 2.90 to 8.40 )

Shipping Volume

Cooling Heating

24,200

4,400

Cooling Heating

Net

Shipping

Package Dimensions

Weight

Height

× Width × Depth

Height

× Width × Depth

Ib. (kg)

cu.ft (m

3

)

(mm)

inch

(mm)

208V Single-Phase 60Hz

inch

-

187 to 253

Dimensions & Weight (Outdoor Unit)

Refrigerant Tubing Connections

Unit Dimensions

Electrical Rating

Sensible Capacity

Latent Capacity

WPower Input

V

A

Available Voltage Range

Running Amperes

Narrow tube

Wide tube

Refrigerant inch (mm)

Tube Diameter inch (mm)

180.8

189.6

15.18

(82.0)

(86.0)

(0.43)

(890

× 900 × 320)

39-3/4

× 40-5/8 × 16-1/4

(1,010

× 1,032 × 413)

35-1/32

× 35-7/16 × 12-19/32

1/4 (6.35)

× 4

3/8 (9.52)

× 2 + 1/2 (12.7) × 2

ft. (m)Max. allowable tubing length per uint

Flare Type

100 (30.5)

R410A / 8.38 (3,800)

Electric Expansion Valve

DC Twin Rotary (Inverter)

Fan Speeds Auto (Hi, Me, Lo)

Control Microprocessor

Features (Outdoor Unit)

HSPF

Compressor Locked Rotor Amperes

BTU/Wh

BTU/h

Performance

- 7.7

%Power Factor 99 99

A 17.0

Voltage Rating

BTU/h

kW

Total Capacity

BTU/h

SEER BTU/Wh 16 -

4-Room Multi Outdoor UnitType

4Number of Connectable Indoor Units

4Number of Operatable Indoor Units

1,942 (3,300) 1,807 (3,070)Air Circulation (High) ft

3

/min (m

3

/h)

Fuse or Circuit Breaker Capacity A 20

Operation Sound (High) Cool/Heat 53 / 52

Remarks:

1. The Values shown in performance section and electrical rating section above are based on the following unit combination.

For other combination unit, please refer to the "Unit Combination Tables" in this manual.

Indoor Unit : KMHS0972 4units Outdoor Unit : CMH3172 1unit

2. Rating conditions are: Cooling : Indoor air temp. 80°F D.B./ 67°F W.B Heating : Indoor air temp. 70°F D.B.

Outdoor air temp. 95°F D.B./ 75°F W.B. Outdoor air temp. 47°F D.B./ 43°F W.B.

< 208V >

dB-A

11

Outdoor Unit CMH1972

2-2-1. Outdoor Unit

Control PCB

Control Circuit Fuse

Controls

Part No.

Microprocessor

250V 25A

CB-CMH1972

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Pints (cc)

-

Micro F

VAC

External Finish Acrylic baked-on enamel finish

FV50S ... 1.91 (900)

-

Internal Controller

Yes

Aluminum Plate Fin / Copper Tube

2

18.1

Face Area

ft

2

(m

2

)

6.40 (0.595)

Coil

Rows

Fins per inch

Heat Exchanger Coil

SIC-71FW-D490-1 ... 1

Compressor Oil ... Amount

8

90

750 / 750

Ohm

DC Motor

Type

Compressor Model / Nominal Output

Compressor

Coil Resistance (Ambient Temp. 68 °F (20 °C))

Ohm

DC Twin Rotary (Hermetic)

5KD240XAB21 / 1,700W

U - V :

V - W :

W - U :

0.720

0.708

0.726

CT (Peak current cut-off control)

Compressor Discharge Temp. Control

Operation cut-off control in abnormal ambient Temp.

Safety Device

Micro F

VAC

Run Capacitor

Crankcase Heater

Yes

Overload Relay

CS-7LN115

Model

Operation Temp.

Open : 239 °F (115 °C), Close : 212 °F (100 °C)

-

230V 30W

1 ... D18-1/8 (D460)

Fan

Propeller

Q'ty ... Dia. inch (mm)

Type

Over-Current Protection

Over-Heat Protection

(Ambient Temp. 68 °F (20 °C))

Fan Motor

Nominal Output

Coil Resistance

Safety Device

Rough Measure RPM (Cool / Heat)

Run Capacitor

Type

Model ... Q'ty

No. of Poles

W

2-2. Major Component Specifications

12

Outdoor Unit CMH2472

Control PCB

Control Circuit Fuse

Controls

Part No.

Microprocessor

250V 25A

CB-CMH2472

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Pints (cc)

-

Micro F

VAC

External Finish Acrylic baked-on enamel finish

FV50S ... 1.91 (900)

-

Internal Controller

Yes

Aluminum Plate Fin / Copper Tube

2

18.1

Face Area

ft

2

(m

2

)

6.40 (0.595)

Coil

Rows

Fins per inch

Heat Exchanger Coil

SIC-71FW-D490-1 ... 1

Compressor Oil ... Amount

8

90

750 / 750

Ohm

DC Motor

Type

Compressor Model / Nominal Output

Compressor

Coil Resistance (Ambient Temp. 68 °F (20 °C))

Ohm

DC Twin Rotary (Hermetic)

5KD240XAB21 / 1,700W

U - V :

V - W :

W - U :

0.720

0.708

0.726

CT (Peak current cut-off control)

Compressor Discharge Temp. Control

Operation cut-off control in abnormal ambient Temp.

Safety Device

Micro F

VAC

Run Capacitor

Crankcase Heater

Yes

Overload Relay

CS-7LN115

Model

Operation Temp.

Open : 239 °F (115 °C), Close : 212 °F (100 °C)

-

230V 30W

1 ... D18-1/8 (D460)

Fan

Propeller

Q'ty ... Dia. inch (mm)

Type

Over-Current Protection

Over-Heat Protection

(Ambient Temp. 68 °F (20 °C))

Fan Motor

Nominal Output

Coil Resistance

Safety Device

Rough Measure RPM (Cool / Heat)

Run Capacitor

Type

Model ... Q'ty

No. of Poles

W

13

Outdoor Unit CMH3172

Control PCB

Control Circuit Fuse

Controls

Part No.

Microprocessor

250V 25A

CB-CMH3172

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Pints (cc)

-

Micro F

VAC

External Finish Acrylic baked-on enamel finish

FV50S ... 2.55 (1,200)

-

Internal Controller

Yes

Aluminum Plate Fin / Copper Tube

2

18.1

Face Area

ft

2

(m

2

)

7.75 (0.72)

Coil

Rows

Fins per inch

Heat Exchanger Coil

SIC-71FW-D490-1 ... 1

Compressor Oil ... Amount

8

90

800 / 750

Ohm

DC Motor

Type

Compressor Model / Nominal Output

Compressor

Coil Resistance (Ambient Temp. 68 °F (20 °C))

Ohm

DC Twin Rotary (Hermetic)

5JD420XAB22 / 3,000W

U - V :

V - W :

W - U :

0.435

0.441

0.452

CT (Peak current cut-off control)

Compressor Discharge Temp. Control

Operation cut-off control in abnormal ambient Temp.

Safety Device

Micro F

VAC

Run Capacitor

Crankcase Heater

Yes

Overload Relay

CS-7LN115

Model

Operation Temp.

Open : 239 °F (115 °C), Close : 212 °F (100 °C)

-

230V 30W

1 ... D18-1/8 (D460)

Fan

Propeller

Q'ty ... Dia. inch (mm)

Type

Over-Current Protection

Over-Heat Protection

(Ambient Temp. 68 °F (20 °C))

Fan Motor

Nominal Output

Coil Resistance

Safety Device

Rough Measure RPM (Cool / Heat)

Run Capacitor

Type

Model ... Q'ty

No. of Poles

W

14

Temperature F ( C)

40

35

30

25

20

15

10

5

0

(

-

20)(

-

15)(

-

10) (

-

5) (0) (5) (10) (15) (20)

-

451423 32 41 50 59 68

Resistance (k ohm)

0

32 50 68 86 104 122 140 158 176 194

40

60

80

100

120

140

160

180

200

20

Resistance (k ohm)

(0) (10) (20) (30) (40) (50) (60) (70) (80) (90)

Temperature F ( C)

2-3. Other Component Specifications

CMH1972 CMH2472 CMH3172

Sensor Name

Compressor temp sensor TKS293B

Model No.

of sensor

11

Quantity of Sensor

1

Outdoor air temp sensor

Outdoor heat exchanger sensor

AW / AN sensor

BW / BN sensor

CW / CN sensor

DW / DN sensor

TKS295B

TKS292B

Model No.

of sensor

Sensor Name

1

1 / 1

0

Quantity of Sensor

1

1 / 1

1

1 / 1

CMH1972 CMH2472 CMH3172

15

Wide tube service valve

dia.3/8" (9.52) × 3

Narrow tube service valve

dia.1/4" (6.35) × 3

4-7/16

5-29/32 2-27/32 2-3/4

2-1/32 4-1/2

2-15/16

2-3/4

29-1/8(740)

23/32

1-13/16

35-7/16(900)

23-15/16 5-11/32

15/32

12-19/32(320)

13-19/32

14-17/32

11-17/32

ID

:23/32

5-ID:15/16

1-3/8

2-15/16

2-1/16

3. DIMENSIONAL DATA

Outdoor Unit CMH1972

Unit: inch(mm)

16

Wide tube service valve

dia.3/8" (9.52) × 3

Narrow tube service valve

dia.1/4" (6.35) × 4

Wide tube service valve

dia.1/2" (12.70) × 1

4-7/16

5-29/32 2-27/32 2-3/4

2-3/4

2-1/32 4-1/2

2-15/16

2-3/4 2-3/4

29-1/8(740)

23/32

1-13/16

35-7/16(900)

23-15/16 5-11/32

15/32

12-19/32(320)

13-19/32

14-17/32

11-17/32

ID:23/32

5-ID:15/16

1-3/8

2-15/16

2-1/16

2-13/32

Outdoor Unit CMH2472

Unit: inch(mm)

17

Wide tube service valve

dia.3/8" (9.52) × 2

Narrow tube service valve

dia.1/4" (6.35) × 4

Wide tube service valve

dia.1/2" (12.70) × 2

4-7/16

5-29/32 2-7/8 2-3/4

2-3/4

2-1/32 4-1/2

2-15/16

2-3/4 2-3/4

35-1/32(890)

23/32

1-13/16

35-7/16(900)

23-15/16 5-11/32

15/32

12-19/32(320)

13-19/32

14-17/32

11-17/32

ID

:23/32

5-ID:15/16

1-3/8

2-15/16

2-1/16

2-13/32

Outdoor Unit CMH3172

Unit: inch(mm)

18

Compressor

4-way

valve

High pressure

switch

H.P.

Main

accumulator

Sub

accumulator

Service valve on

narrow tube

Service valve on

wide tube

CN

BN

AN

CW

BW

AW

O.D.1/4"

O.D.3/8"

Heat exchanger

Cooling cycle

Heating cycle

Defrosting cycle

Indoor unit Outdoor unit

Defrost valve for

hot gas bypass

Strainer Header

Header

S

M

Wide tube

Narrow tube

4. REFRIGERANT FLOW DIAGRAM

4-1. Refrigerant Flow Diagram

Outdoor Unit CMH1972

Insulation of Refrigerant Tubing

Because capillary tubing is used in the outdoor unit, both the

wide and narrow tubes of this air conditioner become cold. To

prevent heat loss and wet floors due to dripping of

condensation, both tubes must be well insulated with a

proper insulation material. The thickness of the insulation

should be a min.5/16"(8 mm).

After a tube has been insulated,

never try to bend it into a narrow

curve because it can cause the tube

to break or crack.

Wide tube

Thickness:

Min.5/16"(8 mm)

Insulation

Narrow tube

Thickness:

Min.5/16"(8 mm)

IMPORTANT

CAUTION

Electric

expansion

valve

19

4-way

valve

High pressure

switch

H.P.

Defrost valve for

hot gas bypass

Outdoor Unit CMH2472

Insulation of Refrigerant Tubing

Because capillary tubing is used in the outdoor unit, both the

wide and narrow tubes of this air conditioner become cold. To

prevent heat loss and wet floors due to dripping of

condensation, both tubes must be well insulated with a

proper insulation material. The thickness of the insulation

should be a min.5/16"(8 mm).

After a tube has been insulated,

never try to bend it into a narrow

curve because it can cause the tube

to break or crack.

Wide tube

Thickness:

Min.5/16"(8 mm)

Insulation

Narrow tube

Thickness:

Min.5/16"(8 mm)

IMPORTANT

CAUTION

Compressor

Main

accumulator

Sub

accumulator

Service valve on

narrow tube

Electric

expansion

valve

Service valve on

wide tube

DN

CN

BN

AN

DW

CW

BW

AW

O.D.1/4"

O.D.3/8"

O.D.1/2"

Heat exchanger

Cooling cycle

Heating cycle

Defrosting cycle

Strainer Header

Header

S

M

Indoor unit Outdoor unit

Wide tube

Narrow tube

20

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Sanyo CMH2472 Technical & Service Manual

Sanyo CMH2472 Technical & Service Manual

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