MovinCool OFFICEPRO60 User Manual

SERVICE MANUAL

OFFICE PRO 60

SERIAL NUMBER FROM APRIL 2007 (0407) TO PRESENT

DocID: 00G00016E

© 2008 DENSO SALES CALIFORNIA, INC. All rights reserved. This book may not be reproduced or copied, in 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 Condensate Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.8 Drain Tanks (optional). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 Office Pro 60 Electrical Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table of Contents

6.3 Control Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.4 Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

6.5 Compressor Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

6.6 Condensate Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.7 Drain Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.8 Automatic Restart after Power Interruption. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

6.9 Compressor Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

6.10 Temperature Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

6.11 Fan Mode Control Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

6.12 Temperature Scale Display Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

6.13 Warning Signal Connection (Outpu t Sign al Terminal L+ and L-) . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.14 Fire Alarm Control Panel Connection (Input Signal Terminal E+ and E-). . . . . . . . . . . . . . . . . . . . . 30

Table of Contents

Repair Section

7. TROUBLESHOOTING

7.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7.2 Self-Diagnostic Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

7.3 Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.4 Basic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

8. DISASSEMBLY

8.1 Parts Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

8.2 Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

8.3 Removal of Electrical Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

8.4 Removal of Blower Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

8.5 Removal of Condensate Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

8.6 Inspection of Capacitor (for Fan Motor and Compressor) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

8.7 Inspection of Drain Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

8.8 Inspection of Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

8.9 Inspection of Compressor Motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

8.10 Inspection of Wiring Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

8.11 Inspection of Thermistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

8.12 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

9. REFRIGERANT SYSTEM REPAIR

9.1 Repair of Refrigerant System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

9.2 Removal of Refrigeration Cycle Compon e nts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

9.3 Charging the System with R-410A Refrigerant. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

9.4 Refrigerant Charging Work. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

10. REASSEMBLY

10.1 Removal of Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

10.2 Compressor Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

10.3 Blower Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

10.4 Wiring Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

10.5 Perform the Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

10.6 Caster Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

10.7 Schematic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Operation Section

1. PRECAUTIONS FOR SAFETY

1.1 Foreword

• This manual has been published to service the MovinCool Office Pro 60. Please use this service manual only when servicing the Office Pro 60.

1.2 Definition of Terms

WARNING

CAUTION

NOTE Provides additional information that facilitates installation or unit operation.

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 da mage to the unit or its components, which may occur during installation or unit operation if sufficient care is not taken.

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.

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

Condenser

(Outdoor Unit)

Operation Section

Evaporator

(Indoor Unit)

MovinCool Office Pro 60 is a spot cooler which directs cool air to particular areas or objects. MovinCool Office Pro 60 has the following features:

2.2 Compact Design

• The innovative design of MovinCool Office Pro 60 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, MovinCool Office Pro 60 requires no piping and can be easily transported and installed.

I000501

2.4 Energy Conservation

• MovinCool Office Pro 60 is economical because it cools only the area or objects which need to be cooled.

I001905

Operation Section

3. CONSTRUCTION

3.1 Exterior Dimensions

(55.0)

(30.2)

(2.6) (3.6)

(29.9)

(2.6) (3.6)

(18.7)

(27.6)

(10.0)

(8.5)

(40.8)

(51.6)

(DIA. 15.7)

(6.1)

(2.4)

(65.0)

(62.2)

(Unit: inch)

I001906

3.2 Exterior Components

Operation Panel

Operation Section

Cold Air Outlet Grill

Caster

Evaporator Air Inlet Grill

Condenser Air Outlet Duct

Service PanelPower CordCondenser Air Inlet Panel

I001907

Operation Section

3.3 Internal Structure

Fan Motor (Evaporator)

(Behind Fan)

Fan (Evaporator)

Evaporator

High Pressure Switch

Capillary Tube

Drain Pan

Condensate Pump

3.4 Basic Construction

Fan (Condenser)

Compressor

Condenser

Fan Motor (Condenser)

Drain Switch

Control Box

I001908

• The MovinCool Office Pro 60 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 condensate pump and optional drain tanks. The rear section contains the condenser, the compressor and the control box.

Operation Section

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 vent. All the air inlets are equipped with filters, and the exhaust air duct is protected by metal grill.

Exhaust Air Out

Cool Air Out

Evaporator Air In

Condenser Air In

3.6 Compressor and Fans

• The compressor is hermetically sealed. Two sets of a two-speed fan motor with a centrifugal fan are used to draw air across the evaporator and condenser.

3.7 Condensate Pump

• The condensate pump and a 20 ft (6 m) drain hose are included with the Of fice Pro 60 to provide continuous operation without the need of the drain tanks. The co ndensate pump has a maximum head lift of 17 ft (5.2 m) at 230 VAC or 13 ft (4.0 m) at 208 VAC.

3.8 Drain Tanks (optional)

I001909

• A set of two 5.0 gal (19 L) drain tanks are supplied as optional accessory for Office Pro 60. When drain tanks are used instead of condensate pump , the condensate (water) is collected into both tanks. The drain switch activates and stops the operation when tanks reach the level of approximately 8.0 gal (30 L).

Operation Section

4. SPECIFICATIONS

4.1 Technical Specifications

Cooling Capacity

ITEM SPECIFICATIONS

cinortcelElenaP lortnoCserutaeF cinortcelE cinortcelElortnoC tatsomrehT

)W 58571/54171( h/utB 00006/00585V 032/802-yticapaC

llorcS citemreHepyT noisserpmoCrosserpmoCtiucriC tnaregirfeR

Wk 98.3V 032 ta tuptuO detaR rotoM

niF etalProtaropavE niF etalPresnednoC

ebuT yrallipaClortnoC tnaregirfeR

Ventilation Equipment For Evaporator

Ventilation Equipment For Condenser

Current Consumption-208/230 V

Total Power Consumption-208/230 V Power Factor-208/230 V

)gk 08.1( bl 79.3/A 014-Rytitnauq desolcnE/tnaregirfeR

lagufirtneCepyT naF

/h)

m 0003/0033( MFC 0771/0491wol/hgih-wolF riA .xaM

Wk 33.0/06.0V 032 ta wol/hgih-tuptuO detaR rotoM

)aP 422( GWI 9.0erusserP citatS lanretxE .xaM

lagufirtneCepyT naF

m 0054/0184( MFC 0562/0382wol/hgih - wolF riA .xaM

/h)

Wk 29.0/02.1V 032 ta wol/hgih-tuptuO detaR rotoM

)aP 212( GWI 58.0erusserP citatS lanretxE .xaM

zH 06 HP 1 ,V 032/802tnemeriuqeR rewoPscitsiretcarahC cinortcelE

V 352 XAM ,V 891 NIMegatloV .XAM .NIM

32/29 A

6.6/6.6 kW 99/99 %

A 061tnerruC gnitratS

A 05ezis esuF dednemmoceR

05-6noitarugifnoC gulP AMENdroC rewoP

• No-Voltage Contact Input/Contact resistance Less than 100 ohm

(resistive load)

Net weight 623 lb (283 kg)

tf 6 x )eroc-3( GWA 6htgneL x egauG

)dednemmocer( epyt tcatnoc yrD•tupnI mralA eriFnoitcennoC langiS

ssel ro )CA/CD( V 03 ta A 2tuptuO langiS gninraW

Operation Section

ITEM SPECIFICATIONS

Operating Condition Inlet air: Maximum 105 °F (41 °C), 50 %RH

Inlet air: Minimum 65 °F (18.3 °C), 50 %RH

Sound Level

Max. Duct Equivalent Length-Per Cold Duct Hose/Hot Duct Hose 40/100 ft (12.1/30.5 m) Condensate Pump 1/30 HP, 230 V, 0.5 A, 75 W,

With Condenser Duct-high/low 69/67 dB (A) Without Condenser Duct-high/low 71/69 dB (A)

Discharge: 3/8 in (9.53 mm)

OD barbed

• Specifications are subject to change without notice.

< NOTE >

*1 :Rating Condition: 95 °F (35 °C), 60 %RH *2 :Measured at 3.28 ft (1 m) from surface of unit.

Operation Section

4.2 Characteristics (at 230 V)

Btu/h)

>evruC ecnereffiD erutarepmeT riA looC<>evruC yticapaC gnilooC<

23.4(13)

21.6(12)

Cooling Capacity (x10

95(35)

86(30)

77(25)

68(20)

Dry Bulb Temp. °F (°C)

(10)

8.0

7.0

6.0

(15)

Wet Bulb Temp. °F (°C)

(20)

(25)

19.8(11)

18.0(10)

16.2(9)

14.4(8)

12.6(7)

Delta-T °F (°C)

10.8(6)

9.0(5)

7.2(4) 30 40 50 60 70 80

Relative Humidity (%)

>evruC noitpmusnoC tnerruC<>evruC noitpmusnoC rewoP<

5.0

Power Consumption (kW)

4.0

95(35)

86(30)

77(25)

68(20)

Dry Bulb Temp. °F (°C)

(20)

Wet Bulb Temp. °F (°C)

(25)

(30)

(35)

Current Consumption (A)

95(35)

86(30)

77(25)

68(20)

Dry Bulb Temp. °F (°C)

(20)

Wet Bulb Temp. °F (°C)

(25)

(30)

(35)

I001910

4.3 Characteristics (at 208 V)

Btu/h)

Operation Section

>evruC ecnereffiD erutarepmeT riA looC<>evruC yticapaC gnilooC<

23.4(13)

21.6(12)

Cooling Capacity (x10

95(35)

86(30)

77(25)

68(20)

Dry Bulb Temp. °F (°C)

(10)

8.0

7.0

6.0

(15)

Wet Bulb Temp. °F (°C)

(20)

(25)

19.8(11)

18.0(10)

16.2(9)

14.4(8)

12.6(7)

Delta-T °F (°C)

10.8(6)

9.0(5)

7.2(4) 30 40 50 60 70 80

Relative Humidity (%)

>evruC noitpmusnoC tnerruC<>evruC noitpmusnoC rewoP<

5.0

Power Consumption (kW)

4.0

95(35)

86(30)

77(25)

68(20)

Dry Bulb Temp. °F (°C)

(20)

Wet Bulb Temp. °F (°C)

(25)

(30)

(35)

Current Consumption (A)

95(35)

86(30)

77(25)

68(20)

Dry Bulb Temp. °F (°C)

(20)

Wet Bulb Temp. °F (°C)

(25)

(30)

(35)

I001911

Operation Section

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.

Evaporator Condenser Compressor

Suction Pipe

Compressor Discharge Pipe

Condenser Inlet Pipe

Condenser Outlet Pipe

Compressor Compressor

Evaporator

Evaporator Inlet Pipe

Capillary Tube

Evaporator Outlet Pipe

Condenser

Capillary Tubes

Condenser

Fan

Evaporator

Fan

Evaporator

Flow of Refrigerant

Compressor

I001912

Operation Section

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 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㧕 3㧕 4㧕 5㧕2㧕

I001767

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 stag es 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.

Operation Section

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

High Temp./High Pressure Liquid Refrigerant

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

Low Temp./Low Pressure

Gas and Liquid Mixture

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, like the condenser , 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.

I001887

5.6 High Pressure Switch

• The high pressure switch prevents the condenser and compressor from being damaged by excessively high pressure in the

Movable Point

high pressure line of the refrigeration cycle. The switch is normally closed. The snap disk

Stationary Point

responds to the variations in pressure and, if pressure is abnormally high, the snap disk moves down to push the pin down, causing the

Molding by Resin

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.

Pressure of Refrigerant

Case

Snap Disk

Terminal

Lead Wires

I001768

6. ELECTRICAL SYSTEM

6.1 Circuit Diagram and Control Box

Operation Section

AP TB1 TB2 CB RB MF1 MF2 MC CF1 CF2 CC

AC 208/230 V 1φ 60 Hz

TB1

TRR1

CF2

CF1

1L1 3L2 5L3

MF2 IOLF

MF1 IOLF

MCC

2T1 4T2 6T3

Attachment Plug Terminal Block Terminal Block Control Board Relay Board Condenser Fan Motor Evaporator Fan Motor Compressor Motor Capacitor for Condenser Motor Capacitor for Evaporator Motor Capacitor for Compressor

IOLC

Condensate Pump

J8 J7 J6 J5 J4 J3 J2 J1

MDP ODSFDS

J10

IOLF IOLC DS THS RTH

G HPRS MCC MDP FDS ODS

RTH THS DS

J101 J102 J103 J104

J201

J105

3 2

J106

J108

HPRS

TB2

LL+

EE+

Inner Overload Relay of Fan Motor Inner Overload Relay of Compressor Full Drain Warning Switch Freeze Protection Thermistor Room Thermistor Grounding High Pressure Switch Relay for Compressor and Condenser Fan Motor Condensate Pump Motor Drain Float Switch Drain Overflow Switch

Compressor Capacitor

Fan Capacitor (Evaporator)

Relay

Fan Capacitor (Condenser)

TB2

Terminal Block (Signal Connection)

Dip Switch

Relay Board

Relay Board Fuse

Terminal Block

TB1

I001913

Operation Section

6.2 Basic Operation of The Office Pro 60 Electrical Circuit

• There are two basic components used to control the operation of the Office Pro 60 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 microprocesso r turns on “F AN 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 J8 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.

• High fan mode is automatically switched depending on room temperature. When room

(High)

temperature is decreased down to 80 °F (27 °C) or below, fan mode is switched to

Condenser Fan

HIGH. When room temperature is increased to 88 °F (31 °C) or higher, fan mode is switched from HIGH to LO.

Room Temperature

(LO)

80 °F

(27 °C)

88 °F

(31 °C)

I001914

Low Fan Mode

• When the FAN MODE button on the control panel is pressed again, th e 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 J7 terminal (relay board) where the low speed wire of the fan motor is connected.

• When this button is pressed again, fan stops.

Operation Section

(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, activate s the compressor relay (relay board) after 120 sec delay. This sends line volt age (208/230 V AC) t o the J4 terminal (relay board) and compressor auxiliary relay is excited. Then compressor and condenser fan motor turn on (Cooling Operation).

• Condenser fan mode is automatically switched

depending on room temperature. When room temperature is approximately. 100 °F (38 °C) or greater, fan mode is switched LO to HIGH. When room temperature is approximately. 95 °F (35 °C), fan mode is switched HI to LO.

(LO)

Condenser Fan

(High)

Room Temperature

95 °F

(35 °C)

100 °F (38 °C)

I001915

+ 48 hidden pages