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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 20-40VMI002-01

    Printed in U.S.A.

        Form 40VMI-2SI

               Pg 1 

    2-20

Replaces: 40VMI-1SI

Installation and Maintenance Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS

 . . . . . . . . . . . . . . . . . . . 1

GENERAL

 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

DIMENSIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

INSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Step 1 — Unpack and Inspect Units

 . . . . . . . . . . . . 7

Step 2 — Position the Unit 

 . . . . . . . . . . . . . . . . . . . . 7

Step 3 — Mount the Unit

 . . . . . . . . . . . . . . . . . . . . . . 8

Step 4 — Connect Piping

. . . . . . . . . . . . . . . . . . . . . 11

Step 5 — Complete Electrical Connections

. . . . . 11

Step 6 — Position and Connect Controller

 . . . . . 14

ACB Interface

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

START-UP

 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Pre-Start Check 

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Drain Pump and Drainage Test 

 . . . . . . . . . . . . . . . 17

System Operation Check 

 . . . . . . . . . . . . . . . . . . . . 17

MAINTENANCE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

INDOOR UNIT ADDRESSING

. . . . . . . . . . . . . . . . . 18

Wireless Remote Controller (40VM900001)

 . . . . . 18

Non-Programmable Controller (40VM900002)

. . . 18

Programmable Controller (40VM900003)

. . . . . . . 19

TROUBLESHOOTING

 . . . . . . . . . . . . . . . . . . . . . . . . 20

Replacement Parts 

. . . . . . . . . . . . . . . . . . . . . . . . . . 21

APPENDIX A — DIP SWITCH SETTINGS

. . . . . . . . 22

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service,

maintenance, or use can cause explosion, fire, electrical shock,

or other conditions, which may cause death, personal injury, or

property damage. The qualified installer or agency must use

factory-authorized kits or accessories when modifying this

product.
Follow all safety codes. Wear safety glasses, protective

clothing, and work gloves. Use quenching cloth for brazing

operations. Have fire extinguisher available. Read these

instructions thoroughly, and follow all warnings or cautions

included in literature and attached to the unit. Consult local

building codes and the current editions of the National

Electrical Code (NEC) ANSI/NFPA (American National

Standards Institute/National Fire Protection Association) 70. In

Canada, refer to the current editions of the Canadian Electrical

Code CSA (Canadian Standards Association) C22.1.
Understand the signal words — 

DANGER

WARNING

, and

CAUTION

DANGER

 identifies the most serious hazards,

which will result in severe personal injury or death.

WARNING

 signifies hazards that could result in personal injury

or death. 

CAUTION

 is used to identify unsafe practices, which

would result in minor personal injury or product and property

damage.

Recognize safety information. This is the safety-alert

symbol (

). When this symbol is displayed on the unit and in

instructions or manuals, be alert to the potential for personal

injury. Installing, starting up, and servicing equipment can be

hazardous due to system pressure, electrical components, and

equipment location.

WARNING

Electrical shock can cause personal injury and death. Shut

off all power to this equipment during installation. There

may be more than one disconnect switch. Tag all

disconnect locations to alert others not to restore power

until work is completed.

WARNING

When installing the equipment in a small space, provide

adequate measures to avoid refrigerant concentration

exceeding safety limits due to refrigerant leak. In case of

refrigerant leak during installation, ventilate the space

immediately. Failure to follow this procedure may lead to

personal injury.

WARNING

DO NOT USE TORCH to remove any component. System

contains oil and refrigerant under pressure.
To remove a component, wear protective gloves and

goggles and proceed as follows:
a. Shut off electrical power to unit.
b. Recover refrigerant to relieve all pressure from

system using both high and low-pressure ports.

c. Traces of vapor should be displaced with nitrogen

and work area should be well ventilated. Refrigerant

in contact with an open flame produces toxic gases.

d. Cut component connection tubing with tubing cutter

and remove component from unit. Use a pan to catch

any oil that may come out of the lines and as a gage

for how much oil to add to the system.

e. Carefully unsweat remaining tubing stubs when

necessary. Oil can ignite when exposed to torch

flame.

Failure to follow these procedures may result in personal

injury or death.

40VMI005-024

1-Way Cassette Indoor Unit for

Variable Refrigerant Flow (VRF) Systems

Summary of Contents for 40VMI Series

Page 1: ...st serious hazards which will result in severe personal injury or death WARNING signifies hazards that could result in personal injury or death CAUTION is used to identify unsafe practices which would...

Page 2: ...omenclature Figs 2 and 3 show unit dimensions Table 2 shows components that may or may not be used for a particular installation Fig 1 Model Number Nomenclature CAUTION DO NOT re use compressor oil or...

Page 3: ...3 6 High 31 7 35 4 41 5 45 0 40 7 45 5 46 2 UNIT Unit Dimensions W x H x D in 42 x 6 x 16 3 4 51 1 2 x 7 1 2 x 18 Panel W x H x D in 46 1 2 x 1 x 18 1 4 53 x 1 x 19 3 4 Unit Net Shipping Weight lb 27...

Page 4: ...2 For piping connections Rope Tie 10 For fastening and tightening Condensate Connection 1 For drain connection Clamp 1 For connecting the drain Washer 8 To secure suspended unit Nut 8 To secure suspe...

Page 5: ...5 DIMENSIONS NOTE All dimensions are shown in inches Fig 2 40VMI005 012 6 1 46 1 2 34 3 4 35 2 3 4 8 3 4 18 1 4 3 4 16 3 4 2 1 2 3 4 2 2 3 4 40 11 1 2 42 2 1 1 2...

Page 6: ...6 NOTE All dimensions are shown in inches Fig 3 40VMI015 024 1 7 1 2 53 41 1 2 2 3 4 19 3 4 9 41 3 4 2 1 4 1 1 4 1 2 3 4 2 18 3 4 1 1 4 2 3 4 48 1 2 1 2 11 3 4 51 1 2 1...

Page 7: ...mplete sample installation in a typical room at the jobsite Check all critical dimensions such as pipe wire and duct connection requirements Refer to job drawings and product dimension drawings as req...

Page 8: ...ns are in inches MOUNTING UNIT The unit can now be lifted on to the hanging rods for mounting 1 Use rods and fasteners to suspend the unit at the factory provided mounting holes 2 Adjust the height of...

Page 9: ...e panel assembly NOTE Be aware that the louver and display wires are connected so be careful when removing the panel a Unhook the clip on the left side of the unit first b Gently angle and twist the p...

Page 10: ...trol panel Remove Panel control display box wire Panle wind deflector motor wire Wind deflector motor wire cable plug connects to the CN21 of the main control panel Room temp sensor T1 wire cable plug...

Page 11: ...nt any breakage in piping Use proper cutting and flaring tools to avoid leakage Use a torque wrench for flare nuts Refer to Table 3 for flare nut torque recommendations Table 3 Flare Nut Torque Recomm...

Page 12: ...indoor unit requires its own power supply Indoor units are not powered through outdoor units Table 4 40VMF Electrical Data Fig 26 Power Supply Specifications WARNING All units must be wired strictly i...

Page 13: ...T2A T2B T1 RED BLUE Occupancy sensor ON OFF Dry contact SW8 SW1 ENC2 ENC1 5V GND 12V ONLY USED FOR TESTING ON 1 2 3 4 ON 1 2 ON ON To wired controller comm bus WHITE BLUE XT2 Red L1 L2 Blue Y G XT1 PO...

Page 14: ...plied in the accessory kit and follow the steps below 1 Cut connector on outdoor unit side Fig 29 Fig 29 Shearing Outdoor Connector 2 Strip a suitable length of insulation layer Fig 30 3 Use a suitabl...

Page 15: ...WUDOL HG FRQWUROOHU ZLUHG FRQWUROOHU ZLUHG FRQWUROOHU 7R 1R LQGRRU 7R 1R LQGRRU 7R 1R LQGRRU 7R 1R LQGRRU 7R 1R LQGRRU 7R 1R LQGRRU 7R RXWGRRU 7R 6XE 0 7R RXWGRRU L1 L2 L4 L4 L5 L6 QGRRU XQLW HB P Q Q...

Page 16: ...L3 L3 L5 L6 L7 Indoor unit 1 HA HB P Q Indoor unit 2 HA HB P Q L8 L10 L11 Indoor unit 5 HA HB P Q Indoor unit 6 HA HB P Q Indoor unit 4 HA HB P Q L9 Indoor unit 3 HA HB P Q L1 4 Matched resistance net...

Page 17: ...is showing normal operation and no error is indicated c Swing mode of air louvers is working if applicable to unit d Drain pump operation is normal if applicable e No abnormal vibration or noise is n...

Page 18: ...ss and hold the LOCK button for at least 10 seconds then press to activate Click or to select an address and press to send the setting To display an indoor unit address use a tool to press and hold th...

Page 19: ...Press TEMP UP or TEMP DOWN to move the cursor and choose IDU ADDRESSING Press MENU OK to access this setting 3 Press TEMP UP or TEMP DOWN to choose the address you want to set See Fig 41 Press MENU O...

Page 20: ...ing Mode Conflict Error E1 Communication Error Between Indoor and Outdoor Unit E2 Check Indoor Temperature Sensor T1 E4 Check Evaporator Outlet Temperature Sensor T2B E5 Check Evaporator Temperature S...

Page 21: ...and Controller Signal wires are short circuited or disconnected Check or reconnect signal wires Signal wires close to electromagnetic source Distance signal wires from electromagnetic source PC board...

Page 22: ...the settings for each parameter controlled by a switch Switches are shown in the default settings POSITION 1 START UP POSITION 2 POSITION 3 NOT USED POSITION 4 INDOOR UNIT IDENTIFICATION Fig A SW1 SE...

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