Carrier 40MFC, 38MFC, 40MFQ, 38MFQ, DACMA Installation Instructions Manual

40MFC / 38MFC
40MFQ / 38MFQ
High---Wall Ductless Split System
Sizes 009 to 022

Installation Instructions

NOTE: Read the entire instruction manual before starting the
installation.

TABLE OF CONTENTS

PAGE

PARTS L IST 2.......................................

MODEL NUMBER NOMENCLATURE 2.................

SAFETY CONSIDERATIONS 3.........................

SYSTEM REQUIREMENTS 3..........................

DIMENSIONS 5......................................

CLEARANCES 6.....................................

INSTALLATION TIPS 7...............................

INDOOR UNIT INSTALLATION 7.......................

OUTDOOR UNIT INSTALLATION 8.....................

INSTALL ALL POWER AND INTERCONNECTING WIRING

TO OUTDOOR UNIT 8................................

ELECTRICAL DATA 9................................

CONNECTION DIAGRAMS 9..........................

INSTALL ALL POWER, INTERCONNECTING WIRING,

AND PIPING TO INDOOR UNIT 10.....................

REMOTE CONTROL INSTALLATION 10.................

SYSTEM VACUUM AND CHARGE 11...................

START--UP 12........................................

TROUBLESHOOTING 13..............................

PARTS LIS T

Part

No.

1 Indoor Unit 1
2 Mounting Plate 1
3 M o u n t ing S c r e w A S T 3 . 9 x 2 5 --- C --- H 5
4 Anchor 5
5 Air Filter 1
6 Remote Control 1
7 Remote Control Holder 1
8 M o u n t ing S c r e w B S T 2 . 0 x 1 0 --- C --- H 2
9 Outdoor Unit 1

Name of P art Qty

■ Indoor

6

I
o
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8

■ Outdoor

3

4

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2

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Air Outlet

7

9

Note:

--- If the outdoor unit is higher than the indoor unit, prevent rain from flowing into the indoor unit along the connection pipe by making a downward arc in the connection pipe bef ore i t
enters the wall to the indoor unit. This will ensure that rain will drip from the connection pipe before it enters the wall.

--- Piping and the interconnecting wiring are field supplied.

--- The illustration above is only a sketch. Different models may be slightly different.

A14342

MODEL NUMBER NOMENCLATURE

38 MFC 009 - - - 1

Voltage
1 = 115-1-60Hz;
3 = 208-230-1-60Hz

System’s nominal capacity in 1000 BTU/Hr
Example: 009 = 9000 BTU/Hr

System’s type:
MFC = Air Conditioner;

MFQ = Heat pump
Equipment type:
40 = Indoor unit;
38 = Outdoor unit

Blank

2

SAFETY CONSIDERATIONS

Installing, starting up, and servicing air--conditioning equipment
can be hazardous due to system pressures, electrical components,
and equipment location (roofs, elevated structures, etc.).

Only trained, qualified installers and service mechanics should
install, start--up, and service this equipment.

Untrained personnel can perform basic maintenance functions such
as cleaning coils. All other operations should be performed by
trained service personnel.

When working on the equipment, observe precautions in the
literature and on tags, stickers, and labels attached to the
equipment.

Follow all safety codes. Wear safety glasses and work gloves. Keep
quenching cloth and fire extinguisher nearby when brazing. Use
care in handling, rigging, and setting bulky equipment.

Read these instructions thoroughly and follow all warnings or
cautions included in literature and attached to the unit. Consult
local building codes and National Electrical Code (NEC) for
special requirements. Recognize safety information. This is the

!

!

safety--alert symbol
in instructions or manuals, be alert to the potential for personal
injury.Understand these signal words: DANGER, WARNING, and
CAUTION. These words are used with the safety--alert symbol.
DANGER identifies the most serious h azards which will result in
severe personal injury or death. WARNING signifies hazards
which could result in personal injury or death. CAUTION is used
to identify unsafe practices which may result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability, or
operation.

!

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal
injury or death.

Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF
position. There may be more than 1 disconnect switch.
Lock out and tag switch with a suitable warning label.

. When you see this symbol on the unit and

WARNING

!

WARNING

EXPLOSION HAZARD

Failure to follow this warning could
result in death, serious personal injury,
and/or property damage.

Never use air or gases containing
oxygen for leak testing or operating
refrigerant compressors. Pressurized
mixtures of air or gases containing
oxygen can lead to an explosion.

!

CAUTION

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in equipment
damage or improper operation.

Do not bury more than 36 in. (914 mm) of refrigerant pipe
in the ground. If any section of pipe is buried, there must be
a 6 in. (152 mm) vertical rise to the valve connections on
the outdoor units. If more than the recommended length is
buried, refrigerant may migrate to the cooler buried section
during extended periods of system shutdown. This causes
refrigerant slugging and could possibly damage the
compressor at start--up.

SYSTEM REQUIREMENTS

Allow sufficient space for airflow and servicing unit. See Fig. 1
and 4 for minimum required distances between unit and walls or
ceilings.

Piping

IMPORTANT: Both refrigerant lines must be insulated
separately.

S Minimum refrigerant line length between the indoor and outdoor

units is 10 ft. (3 m).

S The following maximum lengths are allowed:

REFRIGERANT LINE LENGTHS ft. (m)

Unit Size Max Line Length

9K 65 (20) 25 (8) 25 (8)

12K 65 (20) 25 (8) 25 (8)
17K HP 65 (20) 30 (10) 30 (10)
18K AC 65 (20) 30 (10) 30 (10)

22K 98 (30) 30 (10) 30 (10)

S The following are the piping sizes.

PIPE SIZES (in)

Unit Size Mix Phase Vapo r

9K 1/4 3/8

12K 1/4 1/2
17K HP 1/4 1/2
18K AC 1/4 1/2

22K 3/8 5/8

Refrigerant Charge

REFRIGERANT CHARGE lb. (kg)

Unit Size Air Conditioner (AC)

9K 1.34 (0.61) 2.70 (1.18)

12K 1.43 (0.65) 2.70 (1.18)
17K HP NA 2.87 (1.30)
18K AC 1.87 (0.85) NA

22K 2.60 (1.18) 3.52 (1.60)

S Above charge is for piping runs up to 25 ft. (7.6 m).
S For piping runs greater than 25 ft. (7.6 m), add refrigerant

up to the allowable length as specified below:

ADDITIONAL REFRIGERANT CHARGE

Unit Size oz./ft. (g/m)

9K --- 18K 0.16 (15)

22K 0.32 (30)

S Capillary tubes in outdoor unit are used as metering devices.

Max Elevation

(ID over OD)

Max Elevation

(OD over ID)

Heat Pump (HP)

3

Recommended Connection Method for Power and
cation Wiring (To minimize communication wiring
ence)

Power Wiring:

The main power is supplied to the outdoor unit. The field supplied
connecting cable from the outdoor unit to indoor unit consists of
three (3) wires and provides the power for the indoor unit. Two
wires are high voltage AC power and one is a ground wire.

Consult your local building codes and the NEC (National
Electrical Code) or CEC (Canadian Electrical Code) for special
requirements.

All wires must be sized per NEC or CEC and local codes. Use
Electrical Data table MCA (minimum circuit amps) and MOCP
(maximum over current protection) to correctly size the wires and
the disconnect fuse or breakers respectively.

Per caution note, only copper conductors with a minimum 300 volt
rating and 2/64 --inch thick insulation must be used.

Communication Wiring:

A separate shielded copper conductor only, with a minimum 300
volt rating and 2/64--inch thick insulation, must be used as the
communication wire from the outdoor unit to the indoor unit.

To minimize voltage drop of the control wire, use the following
wire size and maximum lengths shown in the chart below:

Wire Size

18 AWG 50 (15)
16 AWG 50 (15) to 100 (30)

Communi-

interfer-

Length

ft (m)

Alternate Connection Method for Power and Communication
Wiring (May not prevent communication wiring interfer

The main power is supplied to the outdoor unit. The field supplied
connecting cable from the outdoor unit to indoor unit consists of
four (4) wires and provides the power and communication signals
for the indoor unit. Two conductors are for power wiring (L1/L2,
or L/N), one is a ground wire, and one is a DC communication
wire.

Consult your local building codes and the NEC (National
Electrical Code) or CEC (Canadian Electrical Code) for special
requirements. All power wires must be sized per NEC or CEC and
local codes. Use Electrical Data table MCA (minimum circuit
amps) and MOCP (maximum over current protection) to correctly
size the wires and the disconnect fuse or breakers respectively.

Per caution note, only copper conductors with a minimum 300 volt
rating and 2/64 --inch thick insulation must be used.

!

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in equipment
damage or improper operation.

S Wires should be sized based on NEC and local codes.

S Use copper conductors only with a minimum 300 volt

rating and 2/64 inch thick insulation.

CAUTION

ence)

4

DIMENSIONS -- INDOOR

Unit Size W in (mm) D in (mm) H in (mm) Operating Weight lb (kg)

9K 26.8 (680) 7.0 (178) 10.0 (255) 15.4 (7)

12K 30.3 (770) 7.4 (188) 10.0 (255) 16.5 (7.5)

17K HP / 18K AC 35.6 (905) 7.8 (198) 10.8 (275) 19.8 (9)

22K 40.6 (1030) 8.6 (218) 12.4 (315) 26.4 (12)

DIMENSIONS -- OUTDOOR

A14343

L1

L2

Model W in (mm) D in (mm) H in (mm) L1 in (mm) L2 in (mm)

9K/12K 30.7 (780) 9.84 (250) 21.2 (540) 21.61 (549) 10.87 (276) 70.5 (32.0)

17K HP / 18K AC 29.9 (760) 11.2 (285) 23.2 (590) 20.87 (530) 11.42 (290) 82.7 (37.5)

22K 33.3 (845) 12.6 (320) 27.6 (700) 22.05 (560) 13.19 (335) 103.6 (47.0)

D

Operating

Weight lb (kg)

A14344

5

CLEARANCES -- INDOOR

"

5

(0.13m)

min.

CEILING

6" (0.15m) min.

(1.8m)

6'

FLOOR

Fig. 1 --- Indoor Unit Clearance

5

"

(0.13m)

min.

A07891

CLEARANCES -- OUTDOOR

A

D

B

Air-outlet

UNIT

A 24 (610)

B 24 (610)
C 80 (2032)

D 12 (305)
E 24 (610)

Fig. 2 --- Outdoor Unit Clearance

Minimum Value

in. (mm)

Air-inlet

E

C

A07894

6

INSTALLATION TIPS

Ideal installation locations include:

Indoor

Unit

S A location where there are no obstacles near inlet and outlet area.
S A location which can bear the weight of indoor unit.
S Do not install indoor units near a direct source of heat such as

direct sunlight or a heating appliance.

S A location which provides appropriate clearances as outlined in

Fig. 1.

Outdoor

Unit

S A location which is convenient to installation and not exposed to

strong wind.

S A location which can bear the weight of outdoor unit and where

the outdoor unit can be mounted in a level position.

S A location which provides appropriate clearances as outlined in

Fig. 2.

S Do not install the indoor or outdoor units in a location with

special environmental conditions. For those applications, contact
your Ductless Split representative.

INDOOR UNIT INSTALLATION

INSTALL MOUNTING PLATE

The mounting plate will look like one of the following depending
on model size:

6 (150) or more to ceiling

5 (130)
or more to wall

Left rear side
refrigerant pipe
hole ¶2.6 (65)

6.7 (170)

26.8 (680)

Fig. 3 --- Mounting Plate-- Model size 009

6 (150) or more to ceiling

6.7 (170)

5 (130)
or more to wall

Left rear side
refrigerant pipe
hole ¶2.6 (65)

1.8 (45)

30.3 (770)

Fig. 4 --- Mounting Plate-- Model size 012

6 (150) or more to ceiling

3.2 (80)

5 (130)
or more to wall

Left rear side
refrigerant pipe
hole ¶2.6 (65)

35.6 (905)

Fig. 5 --- Mounting Plate-- Model sizes 017 (AC) / 018 (HP)

Indoor unit outline

3.6 (92)





in. (mm)

Indoor unit outline

3.7 (95)

1.6 (41)

1.8 (45)

in. (mm)

3.9 (100)

1.4 (36.5)

in. (mm)

5 (130)
or more to wall

10(255)

Right rear side
refrigerant pipe
hole ¶2.6 (65)

5 (130)
or more to wall

10 (255)

Left rear side
refrigerant pipe
hole ¶2.6 (65)

Indoor unit outline

5 (130)
or more to wall

1.8 (45)

10.8 (275)

Left rear side
refrigerant pipe
hole ¶2.6 (65)

A14345

A14346

A14347

1. Carefully remove the mounting plate, which is attached to
the back of the indoor unit.

2. The mounting plate should be located horizontally and level
on the wall. All minimum spacings shown in Fig. 1 and 3
through 6 should be maintained.

3. If the wall is block, brick, concrete or similar material, drill
.2” (5 mm) diameter holes and insert anchors for the ap­propriate mounting screws.

4. Attach the mounting plate to the wall.

DRILL HOLE IN WALL FOR INTERCONNECTING
PIPING, DRAIN AND WIRING

Refrigerant Line Routing

The refrigerant lines may be routed in any of the four directions
showninFig.8.

For maximum serviceability, it is recommended to have refrigerant
line flare connections and the drain connections on the outside of
the wall that the fan coil can be mounted on.

If piping is going through the back:

1. Determine pipe hole position using the mounting plate as a
template. Drill pipe hole diameter per values given in Fig.
3 through 6. The outside pipe hole is 1/2 --in. (13 mm) min.
lower than inside pipe hole, so it slants slightly downward
(see Fig. 7).

1/2 in. (13 mm)

Min.

INDOOR

Fig. 7 --- Drill Holes

If piping is going through the right or left side:

1. Use a small saw blade to carefully remove the correspond­ing plastic covering on side panel and drill the appropriate
size hole where the pipe is going through the wall.

Pipe holder

Pipe cover

1

Right piping

Fig. 8 --- Piping Locations

OUTDOOR

2

Right back piping

Pipe cover

4

Left piping

3

Left back piping

A07371

A14349

Indoor unit outline

5 (130)
or more to wall

Left rear side
refrigerant pipe
hole ¶2.6 (65)

6 (150) or more to ceiling

11.5 (292) 6.4 (163)

Installation plate

40.6 (1030)

0.8 (21.5)

Fig. 6 --- Mounting Plate-- Model size 022

1.8 (45)

12.4 (315)

Left rear side
refrigerant pipe
hole ¶2.6 (65)

in. (mm)

5 (130)
or more to wall

A14348

7

OUTDOOR UNIT INSTALLATION

G

1. Use a rigid base to support unit in a level position.

2. Locate outdoor unit and connect piping and wiring.

!

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage
or improper operation.

In regions with snowfall and cold temperatures, avoid
installing the outdoor unit in areas where it can be covered by
snow. If the outdoor unit is installed in areas where heavy
snow is expected, a field supplied ice or snow stand and/or
field supplied--installed wind baffle should be installed to
protect the unit from snow accumulation and/or blocked air
intake. Blocking the air intake may result in reduced airflow,
significantly reduced performance and damage to the
equipment.

CAUTION

Strong

wind

!

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in equipment
damage or improper operation.

Excessive torque can break flare nut depending on
installation conditions.

CAUTION

INSTALL ALL POWER AND INTERCONNECTING
WIRING TO OUTDOOR UNITS

1. Mount outdoor power disconnect.

2. Run power wiring from main box to disconnect per NEC
and local codes.

3. Remove field wiring cover from unit by loosening screws.

4. Remove caps on conduit panel.

5. Connect conduit to conduit panel. (See Fig.11 )

6. Properly connect both power supply and control lines to ter­minal block per the connection diagram for the appropriate
unit capacity and voltage. (See Fig. 12)

7. Ground unit in accordance with NEC and local electrical
codes.

8. Use lock nuts to secure conduit.

9. Reinstall field wiring cover.

A07350

Fig. 9 --- High Wind Installation

MAKE REFRIGERANT PIPING CONNECTIONS
(OUTDOOR UNIT)

IMPORTANT: Use refrigeration grade tubing ONLY. No
other type of tubing may be used. Use of other types of tubing
will void manufacturer’s warranty.

Do not open service valves or remove protective caps from tubing
ends until all the connections are made.

Bend tubing with bending tools to avoid kinks and flat spots.

Keep the tubing free of dirt, sand, moisture, and other
contaminants to avoid damaging the refrigerant system.

Avoid sags in the suction line to prevent the formation of oil traps.
Insulate each tube with minimum 3/8--in. (10 mm) wall thermal
pipe insulation. Inserting the tubing into the insulation before
making the connections will save time and improve installation
quality.

1. Remove service valve cover if provided with unit.

2. Cut tubing with tubing cutter. Remove service connection
if provided with unit.

3. Install correct size flare nut onto tubing and make flare con­nection.

4. Apply a small amount of refrigerant oil to the flare connec­tion on the tubing.

5. Properly align tubing in with service valve.

6. Tighten flare nut and finish installation using two wrenches
as shown in Fig. 10.

!

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in equipment
damage or improper operation.

S Be sure to comply with local codes while running wire

from indoor unit to outdoor unit.

S Every wire must be connected firmly. Loose wiring may

cause terminal to overheat or result in unit malfunction.
A fire hazard may also exist. Therefore, be sure all wiring
is tightly connected.

S No wire should be allowed to touch refrigerant tubing,

compressor or any moving parts.

S Disconnecting means must be provided and shall be

located within sight and readily accessible from the air
conditioner.

S Connecting cable with conduit shall be routed through

hole in the conduit panel.

Outdoor unit

Terminal Block

Over 1.57" (40mm)

CAUTION

Conduit panel

Conduit

Fig. 11 --- Field Wiring

A07455

Fig. 10 --- Tighten Flare Nut

A07354

8

ELECTRICAL DATA

OPER.

UNIT SIZE

9K

12K

12K

017K (HP) /

018K (AC)

22K 9.70 17 0.6 0.72 53 0.4 0.061 45 16 25

VOLTAGE

MAX / MIN

127 / 104 115--- 1 --- 6 0 5.30 10 1 15 --- 1 --- 60 0.7 0.31 23 1 1 5 --- 1 --- 60 0.3 0.020 15 19 30

253 / 187 20 8 --- 2 30 --- 1 --- 6 0

COMPRESSOR OUTDOOR FAN INDOOR FAN

V --- P H --- H Z RLA LRA V --- P H --- H Z FLA HP W V --- P H --- H Z FLA HP W

5.30 10

3.95 14 0.6 0.68 50 0.3 0.038 28 14 20

2 08 --- 2 30 --- 1 --- 6 0

0.3 0.33 24

0.2 0.027 20 10 15

2 08 --- 2 30 --- 1 --- 6 0

MCA

CONNECTION DIAGRAMS

MAX FUSE

CB AMP

CONNECTING CABLE

115-1-60
FIELD POWER SUPPLY

OUTDOOR TO INDOOR

GND

2(N)

1(L)

GND

L

N

Indoor Unit
Power Supply

115-1-60

9K and 12K 115V INDOOR UNIT 9K and 12K 115V OUTDOOR UNIT

S

Indoor
Signal
High
Voltage

Ground

Power to
Indoor Unit

115-1-60

S

Indoor
Signal
High
Voltage

CONNECTING CABLE

L

N
Main
Power Supply

115-1-60

208-230-1-60
FIELD POWER SUPPLY

OUTDOOR TO INDOOR

GND

L1

GND

L1

L2

Indoor Unit
Power Supply

208-230-1-60

12K to 22K 208-230V INDOOR UNIT

Notes:

1. Do not use thermostat wire for any connection between indoor and outdoor units.

2. All connections between indoor and outdoor units must be as shown. The connections are sensitive to polarity and will result in a fault code.

S

Indoor
Signal
High
Voltage

Ground

Power to
Indoor Unit

208-230-1-60

12K to 22K 208-230V OUTDOOR UNIT

L2

S

Indoor
Signal
High
Voltage

L1

Main
Power Supply

208-230-1-60

L2

Fig. 12 --- Connection Diagrams

9

INSTALL ALL POWER, INTERCONNECTING

k

WIRING, AND PIPING TO INDOOR UNIT

1. Run interconnecting piping and wiring from outdoor unit to
indoor unit.

2. Run interconnecting cable through hole in wall (outside to
inside).

3. Lift indoor unit into position and route piping and drain
through hole in wall (inside to outside). Fit interconnecting
wiring into back side of indoor unit.

4. Put upper claw at back of indoor unit on upper hook of
Mounting Plate, move indoor unit from side to side to see
that it is securely hooked.

5. Open front cover of indoor unit and remove field wiring ter­minal block cover.

6. Pull interconnecting wire up from back of indoor unit and
position in close to the terminal block on indoor unit.

7. Push lower part of indoor unit up on wall, then move in­door unit from side to side, up and down to check if it is
hooked securely. (See Fig. 13.)

Upper hook

Lower hoo

Fig. 13 --- Indoor Unit Installation

8. Connect wiring from outdoor unit per connection diagram
(see Fig. 12 and Fig. 16).

9. Replace field wiring cover and close front cover of indoor
unit.

10. Connect refrigerant piping and drain line outside of indoor
unit. Refer to Fig. 10 for proper installation of flare
connections. Complete pipe insulation at flare connection
then fasten piping and wiring to the wall as required. Com­pletely seal the hole in the wall.

11. Connect the drain line. The drain line must not have a trap
anywhere in its length, must pitch downwards, and must be
insulated up to the outside wall. See Fig. 14.

A07347a

Indoor unit

Interconnecting
Wiring

Drain Piping

Fig. 15 --- Proper Orientation

NOTE: For applications where gravity cannot be used for

drainage, a condensate pump accessory is available. Consult the
condensate pump Installation Instructions for more information.

REMOTE CONTROL INST ALLATION

Mounting Bracket (if installed o n the wall)

1. Use the two screws supplied with control to attach Mount­ing Bracket to wall in location selected by customer and
within operating range.

2. Install batteries in Remote Control.

3. Place Remote Control into remote control Mounting Brack­et.

4. For remote control operation, refer to the unit Owner’s
Manual.

Front Panel

9K and 12K 115V 12K to 22K 208-230V

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.
.

.

Refrigerant Piping

.

Tape

A07346

.

.

..

.

.

.

.
.

.

.

.

Electrical box
cover

Proper Do not put drain end into waterDo not form a rise

Fig. 14 --- Proper Drain Hose Installation

NOTE: For proper orientation of the refrigerant piping, electrical

cable and drain lines, refer to Fig. 15.

LNS L1 L2 S

A14352

Fig. 16 --- Control and Power Wiring on Indoor Unit

A14351

10

!

t

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment
damage or improper operation.

Never use the system compressor as a vacuum pump.

Refrigerant tubes and indoor coil should be evacuated using the
recommended deep vacuum method of 500 microns. The alternate
triple evacuation method may be used if the procedure outlined
below is followed. Always break a vacuum with dry nitrogen.

SYSTEM VACUUM AND CHARGE

Using Vacuum Pump

1. Completely tighten flare nuts A, B, C, D, connect manifold
gage charge hose to a charge port of the low side service
valve. (See Fig. 17)

2. Connect charge hose to vacuum pump.

3. Fully open the low side of manifold gage. (See Fig. 18)

4. Start vacuum pump

5. Evacuate using either deep vacuum or triple evacuation
method.

6. After evacuation is complete, fully close the low side of
manifold gage and stop operation of vacuum pump.

7. The factory charge contained in the outdoor unit is good for
up to 25 ft. (8 m) of line length. For refrigerant lines longer
than 25 ft (8 m), add refrigerant, up to the allowable length,
as specified in the System Requirements section.

8. Disconnect charge hose from charge connection of the low
side service valve.

9. Fully open service valves B and A.

10. Securely tighten caps of service valves.

Outdoor Unit

Service Valve

Refrigerant

Low Side

A

High Side

B

Fig. 17 --- Service Valve

Manifold Gage

Indoor Uni

C

D

A07360

Deep Vacuum

Method

The deep vacuum method requires a vacuum pump capable of
pulling a vacuum of 500 microns and a vacuum gage capable of
accurately measuring this vacuum depth. The deep vacuum method
is the most positive way of assuring a system is free of air and
liquid water. (See Fig. 19)

5000
4500
4000
3500
3000
2500
2000

MICRONS

1500
1000

500

01234567

MINUTES

LEAK IN
SYSTEM

VACUUM TIGHT
TOO WET

TIGHT
DRY SYSTEM

A95424

Fig. 19 --- Deep Vacuum Graph

Triple Evacuation

Method

The triple evacuation method should only be used when vacuum
pump is only capable of pumping down to 28 in. of mercury
vacuum and system does not contain any liquid water.
Refer to Fig. 20 and proceed as follows:

1. Pump system down to 28 in. of mercury and allow pump to
continue operating for an additional 15 minutes.

2. Close service valves and shut off vacuum pump.

3. Connect a nitrogen cylinder and regulator to system and
open until system pressure is 2 psig.

4. Close service valve and allow system to stand for 1 hr. Dur­ing this time, dry nitrogen will be able to diffuse throughout
the system absorbing moisture.

5. Repeat this procedure as indicated in Fig. 20. System will
then be free of any contaminants and water vapor.

EVACUATE

BREAK VACUUM WITH DRY NITROGEN

WAIT

EVACUATE

500 microns

Low side valve

Charge hose

Low side valve

High side valve

Charge hose

Fig. 18 --- Manifold

Vacuum pump

A07361

BREAK VACUUM WITH DRY NITROGEN

WAIT

EVACUATE

CHECK FOR TIGHT, DRY SYSTEM

(IF IT HOLDS DEEP VACUUM)

RELEASE CHARGE INTO SYSTEM

A95425

Fig. 20 --- Triple Evacuation Method

Final Tubing

Check

IMPORTANT: Check to be certain factory tubing on both indoor

and outdoor unit has not shifted during shipment. Ensure tubes are
not rubbing against each other or any sheet metal. Pay close
attention to feeder tubes, making sure wire ties on feeder tubes are
secure and tight.

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START--UP

Tes t Operation

Perform test operation after completing gas leak and electrical
safety check. (See Fig.. 21)

Manual control

button

Fig. 21 --- Test Operation

1. Push the “ON/OFF” button on Remote Control to begin
testing.

NOTE: A protection feature prevents air conditioner from being
activated for approximately 3 to 4 minutes.

2. Push MODE bu tton, select COOLING, HEATING, FAN
mode to check if all functions work correctly.

3. To run the test using the manual button in the indoor unit:

(1.) Open front panel of the indoor unit;
(2.) Push the manual switch once to energize the unit.

The set conditions of manual operation are as fol­lows:

· Preset set point: 76_F(24_C)

· Fan speed: AUTO

· Discharge air direction: Pre-- set position based on
operation in “Cool” or “Heat” mode.

AUTO/COOL

A14353

SYSTEM CHECKS

1. Conceal the tubing where possible.

2. Make sure that the drain tube slopes downward along its en­tire length.

3. Ensure all tubing and connections are properly insulated.

4. Fasten tubes to the outside wall, when possible.

5. Seal the hole through which the cables and tubing pass.

INDOOR UNIT

1. Do all Remote Control buttons function properly?

2. Do the display panel lights work properly?

3. Does the air deflection louver function properly?

4. Does the drain work?

OUTDOOR UNIT

1. Are there unusual noises or vibrations during operation?

Explain Following Items To Customer
(with the aid of the Owner’s Manual):

1. How to turn air conditioner on and off; selecting
COOLING, HEATING and other operating modes; setting
a desired temperature; setting the timer to automatically start
and stop air conditioner operation; and all other features of
the Remote Control and display panel.

2. How to remove and clean the air filter.

3. How to set air deflection louver.

4. Explain care and maintenance.

5. Present the Owner’s Manual and installation instructions to
customer.

4. Be sure to set manual switch to “OFF” (by pushing it twice
again) after finishing test operation.

NOTE: For Heat Pumps, follow the same procedure.

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TROUBLESHOOTING

For ease of service, the systems are equipped with diagnostic code
display LEDs on both the indoor and outdoor units. The outdoor
diagnostic display is two LEDs (Red and Green) on the outdoor
unit board and is limited to very few errors. The indoor diagnostic

the front of the unit. If possible, always check the diagnostic codes
displayed on the indoor unit first.

The diagnostic codes displayed in the indoor and outdoor units are
listed in the tables below.

display is a combination of flashing LEDs on the display panel or

INDOOR UNIT DIAGNOSTIC GUIDES

Operation Lamp Timer Lamp Display Failure Mode

☆ 1time X E0 Indoor unit EEPROM parameter error
☆ 2times X E1 Indoor / outdoor units communication error
☆ 3times X E2 Zero-crossing signal detection error
☆ 4times X E3 Indoor fan speed has been out of control
☆ 5times X E4 Indoor room temperature sensor is open circuit or short circuited
☆ 6times X E5 Evaporator coil temperature sensor is open circuit or short circuited
☆ 2times On F1 Outdoor temperature sensor is open circuit or short circuited
☆ 3times On F2 Condenser coil temperature sensor is open circuit or short circuited
☆ 4times On F3 Compressor discharge temperature sensor is open circuit or short circuited
☆ 5times On F4 Outdoor unit EEPROM parameter error
☆ 1times ☆ P0 IPM malfunction or IGBT over-strong current protection
☆ 2times ☆ P1 High or low voltage low voltage protection activated
☆ 5times ☆ P4 Inverter compressor drive error

☆ = Flashing, X = Off

For additional diagnostic information, refer to the Service Manual

OUTDOOR UNIT DIAGNOSTIC GUIDES

Green LED Red LED Failure Mode

On X Standby, normal

X On Operation, normal

On On High/Lowvoltageprotectiononcompressorterminal
On ☆ EEPROM error

X ☆ Compressor’s speed is out of control

☆ On Zero --- crossing signal d etection error; lack of phase; synchronization error
☆ X IGBT or Module protection

☆ = Flashing, X = Off
For additional diagnostic information, refer to the Service Manual

☆ ☆ Communication error

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Copyright 2014 Carrier Corporation S 7310 W. Morris St. S Indianapolis, IN 46231

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

Edition Date: 05/14

Catalog No: 38 --- 40MF--- 1SI

Replaces: New

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