Movincool CLASSICPLUS26 User manual

SERVICE MANUAL

CLASSIC PLUS 26

SERIAL NUMBER FROM JANUARY 2009 (0109) TO PRESENT

DocID: 00G00025E

whole or in part, without the written permission of the publisher. DENSO

SALES CALIFORNIA, INC. reserves the right to make changes without

prior notice. MovinCool is a registered trademark of DENSO

Corporation.

Table of Contents

Operation Section

1. PRECAUTIONS FOR SAFETY

1.1 Foreword. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.2 Definition of Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.3 General Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2. GENERAL DESCRIPTION

2.1 Spot Cooler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2 Compact Design. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.3 Easy Transportation and Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.4 Energy Conservation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3. CONSTRUCTION

3.1 Exterior Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.2 Exterior Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.3 Internal Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.4 Basic Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.5 Air Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.6 Compressor and Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.7 Drain Tank. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4. SPECIFICATIONS

4.1 Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.2 Characteristics (at 230 V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.3 Characteristics (at 208 V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5. REFRIGERANT SYSTEM

5.1 Refrigerant System Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2 Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.3 Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.4 Capillary Tube. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.5 Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.6 High Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6. ELECTRICAL SYSTEM

6.1 Circuit Diagram and Control Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.2 Basic Operation of The Classic Plus 26 Electrical Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.3 Control Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table of Contents

6.4 Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6.5 Compressor Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6.6 Power Cord with LCDI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

6.7 Drain Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.8 Condensate Pump Kit (optional). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.9 Automatic Restart after Power Interruption. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.10 Compressor Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.11 Temperature Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.12 Fan Mode Control Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.13 Temperature Scale Display Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.14 Warning Signal Connection (Output Signal Terminal L+ and L-) . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

6.15 Fire Alarm Control Panel Connection (Input Signal Terminal E+ and E-). . . . . . . . . . . . . . . . . . . . . 28

Table of Contents

Repair Section

7. TROUBLESHOOTING

7.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

7.2 Self-Diagnostic Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.3 Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

7.4 Basic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

8. DISASSEMBLY

8.1 Parts Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

8.2 Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

8.3 Removal of Electrical Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

8.4 Removal of Blower Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

8.5 Inspection of Capacitor (for Fan Motor and Compressor) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

8.6 Inspection of Drain Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

8.7 Inspection of Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

8.8 Inspection of Compressor Motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

8.9 Inspection of Wiring Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

8.10 Inspection of Thermistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

8.11 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

9. REFRIGERANT SYSTEM REPAIR

9.1 Repair of Refrigerant System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

9.2 Removal of Refrigeration Cycle Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

9.3 Charging the System with R-410A Refrigerant. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

9.4 Refrigerant Charging Work. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

10. REASSEMBLY

10.1 Removal of Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

10.2 Compressor Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

10.3 Blower Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

10.4 Wiring Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

10.5 Perform the Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

10.6 Caster Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

10.7 Schematic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Operation Section

6

1. PRECAUTIONS FOR SAFETY

1.1 Foreword

• This manual has been published to service the MovinCool Classic Plus 26. Please use this

service manual only when servicing the Classic Plus 26.

1.2 Definition of Terms

1.3 General Precautions

WARNING

• All electrical work if necessary, should only be performed by qualified electrical

personnel. Repair to electrical components by non-certified technicians may result in

personal injury and/or damage to the unit. All electrical components replaced must be

genuine MovinCool parts, purchased from an authorized reseller.

• When handling refrigerant, always wear proper eye protection and do not allow the

refrigerant to come in contact with your skin.

• Do not expose refrigerant to an open flame.

• The proper electrical outlet for MovinCool units must be equipped with a “UL” approved

ground-fault breaker to prevent electrical shock from the unit.

• When brazing any tubing, always wear eye protection, and work only in a well ventilated

area.

• Disconnect power before servicing unit.

• Be careful of any sharp edges when working on unit.

Describes precautions that should be observed in order to prevent injury to

the user during installation or unit operation.

Describes precautions that should be observed in order to prevent damage to

the unit or its components, which may occur during installation or unit

operation if sufficient care is not taken.

NOTE Provides additional information that facilitates installation or unit operation.

WARNING

CAUTION

Operation Section

7

2. GENERAL DESCRIPTION

2.1 Spot Cooler

• In general, conventional air conditioners cool

the entire enclosed environment. They act as

“heat exchangers”, requiring an interior unit

(evaporator) to blow cool air into the interior

and an exterior unit (condenser) to exhaust

exchanged heat to the outdoors.

• Unlike conventional air conditioners, the

MovinCool Classic Plus 26 is a spot cooler

which directs cool air to particular areas or

objects. The MovinCool Classic Plus 26 has the following features:

2.2 Compact Design

• The innovative design of the MovinCool

Classic Plus 26 has resulted in one compact

unit, replacing the need for two separate units.

2.3 Easy Transportation and

Installation

• With the whole cooling system built into one

compact unit, the MovinCool Classic Plus 26

requires no piping and can be easily

transported and installed.

2.4 Energy Conservation

• The MovinCool Classic Plus 26 is economical

because it cools only the area or objects which

need to be cooled.

I000501

Condenser

(Outdoor Unit)

Evaporator

(Indoor Unit)

I002286

Operation Section

8

3. CONSTRUCTION

3.1 Exterior Dimensions

I002580

(10.6)

(43.5)(3.7)

(47.2)

(1.4)

(3.5)

(1.4)

(3.5)

(Unit: inch)

(19.4)

(11.5) (18.8)

(21.4)

(28.7)

(3.7)(3.6)

(DIA. 5.9)

(17.7)

(10.2)

Operation Section

9

3.2 Exterior Components

I002581

Cold Air Outlet Duct

Evaporator

Air Inlet Grill

Condenser Air Outlet Grill

Service PanelPower CordCondenser Air Inlet FilterCasterDrain Tank

Operation Panel

Operation Section

10

3.3 Internal Structure

3.4 Basic Construction

• The MovinCool Classic Plus 26 is compact in construction because the condenser and the

evaporator are enclosed in one unit. The interior is divided into three sections. The upper front

face is equipped with the evaporator, and the lower front face contains the drain tank and

condensate pump (Optional). The rear section contains the condenser, the compressor and the

control box.

I002582

Fan

(Evaporator)

Evaporator

Capillary Tube

Drain Pan

Drain Tank

Drain Switch

Compressor

High Pressure

Switch

Fan

(Condenser)

Fan Motor

Condenser

Control Box

Operation Section

11

3.5 Air Flow

• Air drawn from the right side face passes through the condenser which extracts the heat. This

hot air is blown out through the upper exhaust air duct. Air taken in from the front face is cooled

by the evaporator and then blown through the cool air ducts. All the air inlets are equipped with

filters, and the exhaust air duct is protected by metal grill.

3.6 Compressor and Fans

• The compressor is hermetically sealed. A two-speed fan motor with two centrifugal fans are

used to draw air across the evaporator and condenser.

3.7 Drain Tank

• A 5.0 gal (19 L) drain tank is supplied with the Classic Plus 26. The condensate (water) is

collected into the tank.

The drain switch activates and stops the operation when tank reaches the level of approximately

4.0 gal (15 L).

I002290

Exhaust Air Out

Cool Air Out

Evaporator

Air In

Condenser Air In

Operation Section

12

4. SPECIFICATIONS

4.1 Technical Specifications

ITEM SPECIFICATIONS

Electronic Features Control Panel Electronic

Thermostat Control Electronic

Cooling Capacity

*1

Capacity - 208/230 V 24000/24000 Btu/h (7060/7060 W)

Refrigerant Circuit Compressor Compression Type Hermetic Scroll

Motor Rated Output at 230 V 1.47 kW

Evaporator Plate Fin

Condenser Plate Fin

Refrigerant Control Capillary Tube

Refrigerant/Enclosed quantity R-410A/2.31 lb (1.05 kg)

Ventilation Equipment For

Evaporator

Fan Type Centrifugal

Motor Rated Output - high/low at 230 V 0.56/0.46 kW

Max. Air Flow - high/low at 208 V 673/570 CFM (1141/966 m

3

/h)

Max. Air Flow - high/low at 230 V 708/600 CFM (1200/1017 m

3

/h)

Max. External Static Pressure 0.42 IWG (105 Pa)

Ventilation Equipment For

Condenser

Fan Type Centrifugal

Motor Rated Output - high/low at 230 V 0.56/0.46 kW

Max. Air Flow - high/low at 208 V 1215/1155 CFM (2059/1958 m

3

/h)

Max. Air Flow - high/low at 230 V 1250/1190 CFM (2119/2017 m

3

/h)

Max. External Static Pressure 0.25 IWG (62 Pa)

Electronic Characteristics Power Requirement 208/230 V, 1 PH 60 Hz

MIN. MAX. Voltage MIN 198 V, MAX 253 V

Current Consumption - 208/230 V

*1

11.8/10.8 A

Total Power Consumption - 208/230 V

*1

2.40/2.40 kW

Power Factor - 208/230 V

*1

98/97 %

Starting Current - 208/230 V 41/44 A

Recommended Fuse size 20 A

Power Cord NEMA Plug Configuration 6-20

Gauge x Length 12 AWG (3-core) x 6 ft

Dimension W x D x H (without air duct) 19.4 x 28.7 x 47.2 in

(493 x 729 x 1199 mm)

Net weight 199 lb (90 kg)

Operation Section

13

• Specifications are subject to change without notice.

< NOTE >

*1 :Rating Condition: 95 °F (35 °C), 60 %RH

*2 :Measured at 3 ft (1.0 m) from surface of unit.

Operating Condition Inlet air: Maximum 113 °F (45 °C), 50 %RH

Inlet air: Minimum 70 °F (21 °C), 50 %RH

Sound Level

*2

With Condenser Duct - high/low 66/64 dB (A)

Without Condenser Duct - high/low 69/67 dB (A)

Max. Duct Equivalent Length-Per Cold Duct Hose/Hot Duct Hose 60/45 ft (18.3/13.7 m)

Condensate Tank Capacity 5 ± 0.5 gal (19 ± 2 L)

ITEM SPECIFICATIONS

Operation Section

14

4.2 Characteristics (at 230 V)

I002583

28

26

22

24

20

18

11

13

14

12

10

23.4(13)

21.6(12)

19.8(11)

18.0(10)

16.2(9)

14.4(8)

12.6(7)

10.8(6)

9.0(5)

113(45)

104(40)

95(35)

86(30)

77(25)

68(20)

7.2(4)

Delta-T °F (°C)

Dry Bulb Temp. °F (°C)

Wet Bulb Temp. °F (°C)

(30)

86

(25)

77

(40)

104

(35)

95

(20)

68

(15)

59

Cooling Capacity (x10

3

Btu/h)

Relative Humidity (%)

30 40 50 60 70 80

Current Consumption (A)

Power Consumption (kW)

2.8

2.6

2.4

2.2

2.0

113(45)

104(40)

95(35)

86(30)

77(25)

68(20)

113(45)

104(40)

95(35)

86(30)

77(25)

68(20)

(30)

86

(25)

77

Wet Bulb Temp. °F (°C)

(40)

104

(35)

95

(30)

86

(25)

77

Operation Section

15

4.3 Characteristics (at 208 V)

I002584

28

26

22

24

20

18

11

13

14

12

10

23.4(13)

21.6(12)

19.8(11)

18.0(10)

16.2(9)

14.4(8)

12.6(7)

10.8(6)

9.0(5)

113(45)

104(40)

95(35)

86(30)

77(25)

68(20)

7.2(4)

Delta-T °F (°C)

Dry Bulb Temp. °F (°C)

Wet Bulb Temp. °F (°C)

(30)

86

(25)

77

(40)

104

(35)

95

(20)

68

(15)

59

Cooling Capacity (x10

3

Btu/h)

Relative Humidity (%)

30 40 50 60 70 80

Current Consumption (A)

Power Consumption (kW)

2.8

2.6

2.4

2.2

2.0

113(45)

104(40)

95(35)

86(30)

77(25)

68(20)

113(45)

104(40)

95(35)

86(30)

77(25)

68(20)

(30)

86

(25)

77

Wet Bulb Temp. °F (°C)

(40)

104

(35)

95

(30)

86

(25)

77

Operation Section

16

5. REFRIGERANT SYSTEM

5.1 Refrigerant System Construction

The component parts of the refrigerant system include the following:

• Compressor, Evaporator, Condenser, Capillary tube, High Pressure Switch

These parts are all connected by copper tubing. All the connections have been brazed.

I002585

Condenser

Compressor

Discharge Pipe

Condenser

Discharge Pipe

Condenser

Inlet Pipe

Compressor

Capillary Tube

Compressor

Suction Pipe

Evaporator

Flow of

Refrigerant

Compressor

Evaporator

Condenser

Fan

Motor

Capillary

Tubes

Operation Section

17

5.2 Compressor

• The compressor used for the unit is hermetically sealed. The compressor and the compressor

motor are in one casing.

(1) Compressor theory of operation

• The scroll compressor utilizes an involuted spiral which, when matched with a mating scroll

form, generates a series of crescent-shaped gas pockets between the two members. During

compression, one scroll remains stationary (fixed scroll) while the other form (orbiting scroll) is

allowed to orbit (but not rotate) around the first form. As this motion occurs, the pockets between

the two forms are slowly pushed to the center of the two scrolls while simultaneously being

reduced in volume. When the pocket reaches the center of the scroll form, the gas, which is now

at a high pressure, is discharged out of a port located at the center. During compression, several

pockets are being compressed simultaneously, resulting in a very smooth process. Both the

suction process (outer portion of the scroll members) and the discharge process (inner portion)

are continuous.

(2) Compressor operation

1) Compression in the scroll is created by the interaction of an orbiting spiral and a stationary spiral.

Gas enters the outer openings as one of the spirals orbits.

2) The open passages are sealed off as gas is drawn into the spiral.

3) As the spiral continues to orbit, the gas is compressed into two increasingly smaller pockets.

4) By the time the gas arrives at the center port, discharge pressure has been reached.

5) Actually, during operation, all six gas passages are in various stages of compression at all times,

resulting in nearly continuous suction and discharge.

< NOTE >

When the compressor shuts off, the compressor motor may run backward for a moment or two

until internal pressures is equalized. This has no effect on compressor durability but may cause

an unexpected sound after the compressor is turned off and should not be diagnosed as a

malfunction.

I001767

1㧕 3㧕 4㧕 5㧕2㧕

Operation Section

18

5.3 Condenser

• The condenser is a heat exchanger with copper tubes that are covered with thin aluminum

projections called plate fins.

• Heat is given off and absorbed by air being pulled across the condenser fins by the centrifugal

fan and then expelled through the exhaust air duct.

5.4 Capillary Tube

• The capillary tube is a long thin tube utilizing

line flow resistance to serve as an expansion

valve. The length and the inner diameter of the

capillary tube are determined by the capacity of

the refrigeration system, specified operating

conditions, and the amount of refrigerant. The

capillary tube causes the high pressure, high

temperature liquid refrigerant sent from the

condenser to expand rapidly as the refrigerant

is sprayed out through the fixed orifice in the capillary tube. As a result, the temperature and

state of the refrigerant becomes low and mist-like respectively, causing it to evaporate easily.

5.5 Evaporator

• The evaporator is a heat exchanger covered with plate fins. Heat is removed from the air being

pulled across the evaporator by the centrifugal fan and the resulting cool air is expelled through

the cool air vent.

5.6 High Pressure Switch

• The high pressure switch prevents the

condenser and compressor from being

damaged by excessively high pressure in the

high pressure line of the refrigeration cycle.

The switch is normally closed. The snap disk

responds to the variations in pressure and, if

pressure is abnormally high, the snap disk

moves down to push the pin down, causing the

internal contacts to open. This interrupts the

ground signal at the control board (J104 connector) which turns the compressor off.

• Possible causes of this trouble include:

- The condenser air filter is dirty, restricting air flow.

- The condenser blower is defective.

I001887

High Temp./High Pressure

Liquid Refrigerant

Low Temp./Low Pressure

Gas and Liquid Mixture

I001768

Pressure of Refrigerant

Movable Point

Snap Disk

Terminal

Lead Wires

Stationary Point

Molding by Resin

Case

Operation Section

19

6. ELECTRICAL SYSTEM

6.1 Circuit Diagram and Control Box

I002586

AC 208/230 V 1φ 60 Hz

AP

G

HI

LO

MC

CN RTH THSDS

CB

HPRS

TB2

L-

J106

J108

J105

J101 J102 J103 J104

J201

L+

E-

E+

3

2

1

Jumper

Line

IOLC

MF

IOLF

12

CF

CC

12

G

T R

J9

J8

RB

J6

J5

J4

J3

J2

J1

AP

T B1

T B2

CB

RB

M F

MC

C F

CC

Attachment Plug

Terminal Block

Control Board

Relay Board

Fan Motor

Compressor Motor

Capacitor for Fan Motor

Capacitor for Compressor

I O LF

I O L C

DS

THS

R TH

G

HPRS

C N

Inner Overload Relay of Fan Motor

Inner Overload

Relay of Compressor

Full Drain Warning Switch

Freeze Protection Thermistor

Room Thermistor

Grounding

High Pressure Switch

Connector for Option Drain Pump

TB1

Relay Board Fuse

Relay Board

Terminal Block

Fan Capacitor

Dip Switch

Compressor

Capacitor

TB2

Terminal Block

(Signal Connections)

TB1

Operation Section

20

6.2 Basic Operation of The Classic Plus 26 Electrical Circuit

• There are two basic components used to control the operation of the Classic Plus 26 electrical

system:

- Control panel assembly

- Control box

• The control panel assembly contains the control panel, control board (with inputs for the freeze

and room temperature thermistors), drain switch, high pressure switch and a microprocessor.

(1) Fan mode

High Fan Mode

• When the FAN MODE button on the control panel is pressed, the microprocessor turns on “FAN

HI” “COOL OFF” indication of LCD and activates both the fan on relay and fan mode relay. This

sends line voltage (208/230 VAC) from the fan on relay to the N.O. (normally open) contacts of

the fan mode relay. This output is connected to the J6 terminal (relay board) where the high

speed wire of the fan motor is connected.

• When this button is pressed again, fan turns to low mode (see below). Press again, fan stops.

Low Fan Mode

• When the FAN MODE button on the control panel is pressed again, the microprocessor turns on

“FAN LO” “COOL OFF” indication of LCD and activates both the fan on relay and fan mode relay.

This sends line voltage (208/230 VAC) from the fan on relay to the N.C. (normally closed)

contacts of the fan mode relay. This output is connected to the J5 terminal (relay board) where

the low speed wire of the fan motor is connected.

• When this button is pressed again, fan stops.

(2) Cool mode

• In addition to fan mode (as described above), when the COOL ON/OFF button on the control

panel is pressed, the microprocessor turns on “COOL ON” indication of LCD and if the

temperature set point is less than the current room temperature, activates the compressor relay

(relay board) after 120 sec delay. This sends line voltage (208/230 VAC) to the J4 terminal (relay

board) where the compressor wire is connected. Then the compressor turns on for Cooling

Operation.

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Movincool CLASSICPLUS26 User manual

Movincool CLASSICPLUS26 User manual

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