International comfort products DFS2A318J2A, DFS2A/H 2X09, DFS2H318J2A, DFS2A/H 2X12, DFS2A324J2A Installation, Start-up And Service Instructions Manual

Cooling Model Heat Pump
DFS2A318J2A DFS2H318J2A
DFS2A324J2A DFS2H324J2A

Installation, Start-Up, and Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS 1. . . . . . . . . . . . . . . . . . . . . .

GENERAL 1−7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

INSTALLATION 7−14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Indoor Unit Installation 7. . . . . . . . . . . . . . . . . . . . . . . .

Outdoor Unit Installation 9. . . . . . . . . . . . . . . . . . . . . . . .

Power Supply 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Leak Test 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Wiring Diagrams 12−13. . . . . . . . . . . . . . . . . . . . . . . . . . .

START−UP 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

System Checks 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CARE AND MAINTENANCE 14. . . . . . . . . . . . . . . . . . . . . . .

Outdoor Units 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Indoor Units 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

To Clean the Indoor Unit Front Panel 14. . . . . . . . . . . .

To Clean Indoor Coil 14. . . . . . . . . . . . . . . . . . . . . . . . . . .

Air Filters for Indoor Units 14. . . . . . . . . . . . . . . . . . . . . .

SERVICE 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TROUBLESHOOTING 16−19. . . . . . . . . . . . . . . . . . . . . . . .

421 01 9219 00

R−22

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.

51302618919−B NOV 06

DFS2A/H 2X09, 2X12

Duct Free Systems

SAFETY CONSIDERATIONS

Safety Labeling and Signal Words

DANGER, WARNING, CAUTION, and
NOTE

The signal words DANGER, WARNING, CAUTION, and

NOTE are used to identify levels of hazard serious-

ness. The signal word DANGER is only used on
product labels to signify an immediate hazard. The
signal words WARNING, CAUTION, and NOTE will
be used on product labels and throughout this manu­al and other manuals that may apply to the product.

DANGER − Immediate hazards which will result in se-

vere personal injury or death.

WARNING − Hazards or unsafe practices which could

result in severe personal injury or death.

CAUTION − Hazards or unsafe practices which may re-

sult in minor personal injury or product or property
damage.

NOTE − 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 or servicing system, always turn off main

power to system and install lockout tag on disconnect.

There may be more than one disconnect switch.

WARNING

Signal Words in Manuals

The signal word WARNING is used throughout this

manual in the following manner:

WARNING

!

The signal word CAUTION is used throughout this
manual in the following manner:

!

Signal Words on Product Labeling

Signal words are used in combination with colors and/or

pictures on product labels.

WARNING

CAUTION

GENERAL

These instructions cover the installation, start−up and servicing of
DFC2A/DFC2H outdoor and DFF2A/DFF2H indoor units
cooling only and heat pump duct free systems. See Table 1 for
parts included. See Tables 2 and 3 for Physical Data.

SYSTEM REQUIREMENTS

IMPORTANT: The Indoor units & the inter units cable voltage
is 30 VDC.

IMPORTANT: Each refrigerant line must be insulated
Separately. See line sizing requirements in able 2.

S Consult local building codes and National Electrical Code

(NEC, U.S.A.) for special installation requirements.

Max. cable length

1V. Therefore max. length:

For #18 AWG 24.3 Feet (7.4 m)
For #16 AWG 37.7 Feet (11.5 m)
For #14 AWG 50.0 Feet (18 m)

. Total voltage drop should not exceed

!

CAUTION

UNIT COMPONENT DAMAGE
Failure to follow this caution may result in damage to unit
components.

Do not bury more than 36 in. of refrigerant pipe in the ground.
If any section of pipe is buried, there must be a 6 in. 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.

S Use only type ”G” or ”C” fuses. Use single length power

cable without extension. Allow sufficient space for airflow
clearance on condensing units for wiring, refrigerant piping,
and servicing unit. See Fig. 1 and 2 for minimum required
distances between unit and walls or ceilings.

S Indoor and outdoor units should be installed at a Mini-

mum length of 10 ft. apart. Maximum line length of 50 ft.
and vertical separation of 30 ft.

S Do not install indoor units near a direct source of heat such

as direct sunlight, steam or flame.

TOP (min.)
2" (0.6m)

LEFT (min.)
6" (0.15m)

FRONT (min.)
2" (0.6m)

REAR (min.)
6" (0.15m)

RIGHT (min.)
2" (0.6m)

Fig. 1 — DFC2A/H318, 324 Outdoor Unit Clearances

2

Table 1—Parts List — High Wall Units

ITEM

Mounting Bracket

Long Screws

Outdoor Sensor

Connecting

Cable

Absorption Cushions

Electric Terminals

QTY DIAGRAM

2 X 1

DFF2A/DFF2H 09, 12

2 X 8

2 X 1

(Available for HEAT PUMP ONLY)

4

2 X 8

Remote Controller

Mounting Bracket

Remote Controller

and Batteries

Insulation for

Indoor Fittings

Owner’s Manual

2 X

1 Mounting

Bracket with 2 screws

2 X 1

2 X 1

2 X 1

Wall−mounted

Receiver RTX

1

(OPTIONAL)

(Not Included)

NADA001TW

3

Table 2—Physical Data − Cooling Only

INDOOR UNIT

COOLING CAPACITY (Btuh) SEER 2 X 9,000

2 X DFF2AH09J1A 2 X DFF2AH12J1A

2 X 11,400

13.0

13.0

SYSTEM CHARGE (Ib)* 2 X 2.4 2 X 3.1

MOISTURE REMOVAL (pt/hr)

AIRFLOW (3 Speeds)

2 X 350 / 2 X 280 / 2 X 220 2 X 350 / 2 X 280 / 2 X 220

2 X 2.6 2 X 4.5

High / Med. / Low Cfm

DIMENSIONS LxHxW (in.) 32 3/32x10 15/64x7 9/32 32 3/32x10 15/64x7 9/32

REFRIGERANT TYPE R−22 R−22

NET WEIGHT (Ib) 2 X 19.0 2 X 19.0

OUTDOOR UNIT DFC2A318J2A DFC2A324J2A

TUBE CONNECTIONS

30/30/50 30/30/50

Vert Lift/Vert Drop/Max Length (ft)

NOMINAL LINE SIZING

1/4...1/2 1/4...1/2

Mixed Phase...Suction (in.)

COMPRESSOR TYPE Panasonic−2R13S126A6F Panasonic−2P17SR126B1A

DIMENSIONS LxHxW(in.) 35.5 X 49.5 X 12.6 35.5 X 49.5 X 12.6

NET WEIGHT (Ib) 226 228

METERING TYPE Piston (Accurator) Piston (Accurator)

LEGEND Accurator is non−serviceable

SEER — Seasonal Energy Efficiency Ratio
*Units are shipped with a factory charge based on 25 ft of refrigerant lines.

Table 3—Physical Data − Heat Pump

INDOOR UNIT

COOLING CAPACITY (Btuh)

SEER

HEATING CAPACITY (Btuh)

HSPF

2 X DFF2AH09J1A 2 X DFF2AH12J1A

2 X 9,000

13.0

17,200

7.7

2 X 11,400

13.0

23,600

7.7

SYSTEM CHARGE (Ib)* 2 X 2.4 2 X 3.1

MOISTURE REMOVAL (pt/hr)

AIRFLOW (3 Speeds)

2 X 350 / 2 X 280 / 2 X 220 2 X 350 / 2 X 280 / 2 X 220

2 X 2.6 2 X 4.5

High / Med. / Low Cfm

DIMENSIONS LxHxW (in.) 32 3/32x10 15/64x7 9/32 32 3/32x10 15/64x7 9/32

REFRIGERANT TYPE R−22 R−22

NET WEIGHT (Ib) 2 X 19.0 2 X 19.0

OUTDOOR UNIT DFC2A318J2A DFC2A324J2A

TUBE CONNECTIONS

30/30/50 30/30/50

Vert Lift/Vert Drop/Max Length (ft)

NOMINAL LINE SIZING

1/4...1/2 1/4...1/2

Mixed Phase...Suction (in.)

COMPRESSOR TYPE Panasonic−2R13S126A6F Panasonic−2P17SR126B1A

DIMENSIONS LxHxW(in.) 35.5 X 49.5 X 12.6 35.5 X 49.5 X 12.6

SHIPPING WEIGHT (Ib) 226 228

METERING TYPE Piston (Accurator) Piston (Accurator)

LEGEND Accurator is non−serviceable

HPSF — Heating Seasonal Performance Factor
SEER — Seasonal Energy Efficiency Ratio

*Units are shipped with a factory charge based on 25 ft of refrigerant lines.
NOTE: Standard Ambient Operating Limitations − 55 F to 125 F (12.7 C to 51.6 C).

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INSTALLATION

Plan the installation carefully to avoid component failures and
make installation easier.

Indoor Unit Installation

REFRIGERANT LINE ROUTING — The refrigerant lines may
be routed in any of the four directions shown in Fig. 3.

INSTALL THE MOUNTING BRACKET

1. Carefully remove the mounting bracket, which is con­nected to the back of the indoor unit’s base with screws.

2. Position the mounting bracket on the wall and level it us­ing a spirit level (see Fig. 2 for minimum required clear­ance distances).

3. Mark the four drilling holes on the wall, as they appear in
Fig. 4.

4. Drill the holes, insert the wall plugs and use four long
screws to attach the mounting bracket to the wall.

5. Check that the bracket is leveled and securely fastened to
the wall.

DRILL A HOLE IN THE WALL FOR DRAINAGE AND
INTER−UNIT CONNECTIONS

To make the connections between the indoor and outdoor units,
drill a 2.5−in. hole through the wall for the refrigerant lines,
drainage hose and control cable passage as shown in Fig. 5.

1. Mark the center of the hole to be drilled according to the re­frigerant line routing used and dimensions shown in Fig. 4.

2. Make sure to drill outwards and downwards, so that the
opening in the outside wall is at least 1/2” lower than the
opening on the inside.

3. Make sure the drainage hose is at the bottom side of the
hole.

4. If refrigerant line route no. 1,2 or 4 are used, use a small
saw blade to carefully remove the corresponding plastic
covering on the side panel.

5. Run the outdoor sensor cable, electrical cable, refrigerant
lines, and drainage tube through the hole.

6. Fill the remaining wall hole gap with an appropriate seal­ant material.

Fig. 3 — Refrigerant Lines

09, 12

G-2

09, 12

G-2

2.6

2.1

ALL DIMENSIONS ARE IN inches

66

54

ALL DIMENSIONS ARE IN mm

25

17.72

9.84

635
450
250

3.15

10.63 4.92

80

270 125

3.5

1.77

0.35

1.77
A

90

45

9

45

A

Fig. 4 — Mounting Bracket DFF2A/DFF2H 09, 12

2.5-IN.

Fig. 5 — Drill Holes

10.24

2.5

260

64

7

WIRE THE INDOOR UNIT

FILTER

IR
RECEIVER

POWER/AIRCOND

TIMER

FUSE

AUTO/OFF
FILTER RESET

SERVICE LED

POWER/AIRCOND

TIMER

FUSE

AUTO/OFF
FILTER RESET

SERVICE LED

AUTO/OFF
FILTER RESET

SERVICE LED

1. Strip the cables back 1/4 inch.

2. Remove the unit’s front panel by lifting the lower part and
pulling it gently outward and upward. See Fig. 6.

3. Remove the two screws from the control box cover and
take off the cover. See Fig. 7. Save the screws to reassem­ble.

NOTE: In general wiring the indoor unit does not require the
removal of the grille frame but in case of need do as follow:

4. Remove the two screws from the air discharge opening.
Save the screws to reassemble. See Fig. 7A.

S Pull downwards and outwards on the bottom of the grille

and gently raise the frame of the top of the unit.

S Once all covers are off, mount the unit onto the wall mount-

ing bracket. See Fig. 8.

NOTE: Leave covers off until after the Making Drainage
Connections section.

S Route the interconnecting unit’s electric cable and the out-

door sensor cable towards the lower right hand corner of the
indoor unit.

S Make sure that the wires are connected in accordance with

the wiring diagram on the inside of the unit front cover or
within this instruction manual.

S Secure the control cables to the strain relief.
S For heat pump systems only, connect the outdoor sensor

TH3 to its mating black terminal. See Fig. 9.

!

WARNING

Fig. 6 — Remove Grille Insert

Fig. 7 — Remove Control Cover

Fig. 7a — Remove the screws from the air discharge

opening.

Mount the indoor unit on the mounting bracket

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

Make sure that all wires and screws are firmly fastened.

REASSEMBLE

1. Connect the display connector to the display panel printed
circuit board.

2. Put the control box cover and grille frame back on using
the appropriate screws (Steps 3 and 4 of Wire the Indoor
Unit section). Put the grille insert back on.

Model−2 X 12 DIP Switches location

Model−2 X 09 DIP Switches location

Model−2 X 12 DIP Switches location

Model−2 X 09 DIP Switches location

HEAT PUMP

(on the control box side)

HEAT PUMP

(on the control box side)

COOLING ONLY

(on the control box side)

COOLING ONLY

(on the control box side)

Standard Dip Switches
status from the factory

Gently push with the arrow direction

Fig. 8 — Indoor Unit Mounting

Inter unit

terminal block

30VDC

Display

Connection

TH1

TH2

TH3

(Heat Pump Only)

Inter unit cable clamp

Fig. 9 — Outdoor Sensor Connection

8

ATTACH THE REMOTE CONTROLLER MOUNTING

N L1

115 VAC

1

2

3

4

5

24 VAC

FAN (H)

FAN (L)

R.V.S

COMP.

COMMON

1

2

3

4

5

24 VAC

FAN (H)

FAN (L)

R.V.S

COMP.

COMMON

1

2

1

2

3

4

5

24 VAC

FAN (H)

FAN (L)

R.V.S

COMP.

COMMON

N L1

115 VAC

1

2

3

4

5

24 VAC

FAN (H)

FAN (L)

R.V.S

COMP.

COMMON

1

2

3

4

5

24 VAC

FAN (H)

FAN (L)

R.V.S

COMP.

COMMON

1

2

BRACKET

1. Use the two screws supplied with the controller to attach
the mounting bracket to the wall in the location selected
by the customer (see Fig. 10).

2. Install batteries in the remote control.

3. Place remote control into remote control mounting brack­et.

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

REMOTE CONTROL

REMOTE CONTROL

MOUNTING BRACKET

Fig. 10 — Attach Mounting Bracket to the Wall

(OPTIONAL)

NADA001TW

Use only ”L” type sealed, dehydrated copper refrigerant tubing.
No other type of tubing may be used. Use of other types of tubing
will void the manufacturer’s warranty.

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

Bend tubing with special bending tools to avoid the formation of
sharp bends. Take care to avoid kinks or flattening of the tubing.

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 3/8−in. walled thermal pipe
insulation. Inserting the tubing into the insulation before
making the connections will save time and improve
installation The suction and mixed−phase lines should never
come in direct contact.

INTER UNIT
TERMINAL BLOCK

POWER SUPPLY

TERMINAL BLOCK

HIGH/LOW

VOLTAGE METAL

BARRIER

Fig. 11 — Wall Mounted Unit – RTX

Outdoor Unit Installation

NOTE: The outdoor unit must be installed on a solid surface

(mounting base).

1. Place the rubber absorption cushions (supplied with the
outdoor unit) under the unit’s feet to prevent vibrations.

2. Fasten the outdoor unit legs to the mounting base, as
shown in Fig. 12. The cushion goes between the legs and
the mounting base.

3. Be sure that the unit is leveled.

MAKE REFRIGERANT PIPING CONNECTIONS (OUT­DOOR UNIT) — To connect the refrigerant lines:

Make sure to properly identify and separate between the piping
and control cables coming from indoor unit No. 1 and the piping
and cables coming from indoor unit No. 2

TH3 SENSOR

(HEAT PUMP ONLY)

METAL CONDUIT

CONNECTION PLATE

POWER SUPPLY

CABLE

INTER UNIT CABLE

4 ABSORPTION CUSHION TO

BE PUT UNDER EACH LEG

Fig. 12 — Legs Mounting Base and Wiring Outdoor

Units

Models: DFC2A/H318J2A, DFC2A/H324J2A

9

INDOOR UNIT

2 X 09, 2 X 12

Operation push button for
automatic operation (23°C/73°F),
turning the a/c OFF, canceling
the malfunction indication,
and resetting the filter LED.

PLASTIC CONTROL

COVER

Fig. 12A — Indoor unit LED’s and Wiring

FLARING AND CONNECTING REFRIGERANT LINES

1. Remove the protective cap from the flare fitting.

2. Remove the protective cap from the tubing and cut to the
required length. Be sure that the cut is perpendicular and
clean, without burrs.

3. Slip the flare nut on the tubing and flare the tube end using
standard flaring tools.

4. Tighten the nut until resistance is met. Mark the nut and
the fitting. Using a suitable wrench tighten an additional ¼
turn. Use the following specified torque, according to con­nection size:

Mixed−Phase line: Suction line:

1/4 in.−(12.3 ft−lb.) 1/2 in.−(36 ft−lb.)

Both refrigerant lines need to be insu­lated separately

NOTE: The service valves on the outdoor unit must remain

closed until all 4 connections have been made.

EVACUATE TUBING AND CHARGE THE SYSTEM —
When all the fittings are connected, air must be expelled, then
refrigerant charge must be checked and adjusted. Follow the steps
below.

1. Open the service port cap on the suction line valve (large
valve of unit No. 1).

2. Connect the vacuum pump to the service port of unit No.
1 via the pressure gage and evacuate to 500 microns to
eliminate contamination and moisture.

OFF ON

IR RECEIVER

TIMER

SERVICE LED

FILTER

3. Disconnect the vacuum pump. Unit should maintain 500
microns for 5 minutes.

4. Remove the service port caps from the mixed−phase valve
and suction line valve

5. Open the mixed−phase valve (small valve) with an Allen
wrench.

6. Open the suction line valve (large valve) with an Allen
wrench.

7. To evacuate and charge unit No. 2 repeat steps 1 thru 6.

8. The outdoor unit is supplied with sufficient R−22 re-

frigerant for up to 25 ft. lineset length. Add 0.9 oz. of
refrigerant for each additional 3 ft. of tubing length.

9. Make sure that the valves are properly opened. Be careful
not to open them more than required as this may damage
the thread.

10. Replace the service port cap. Using refrigerant oil, lubri­cate the cap beam and hand tighten until resistance is met.
Use a suitable wrench to tighten the cap by an additional
1/2 turn.

Power Supply — See Tables 4 and 5 for electrical data and Fig.
13−14 for system wiring diagrams.

Lea k Te s t — Leak test all fittings with appropriate test
equipment.

10

Table 4—Electrical Data, Indoor Units — 30VDC

UNIT

VOLTAGE MCA* MOCP* FULL

LOAD
AMPS

FAN MO-

TOR

AMPS

COM-

PRESSOR

AMPS

COMPRESSOR

LOCKED ROTOR

DFF2AH 09J1A 30VDC N/A N/A 1.8 1.1 N/A N/A

DFF2HH 12J1A 30VDC N/A N/A 1.8 1.5 N/A N/A

LEGEND

MCA - Minimum Circuit Amps
MOCP - Maximum Overcurrent Protection

* If indoor unit is powered from outdoor terminal block, the MOCP for the

outdoor unit is for both sections

NOTE: Specifications and performance data are subject to change with-

out notice.

3095897

Table 5—Electrical Data, Outdoor Units — 115, 1−60

UNIT

VOLTAGE MCA* MOCP* FULL

LOAD
AMPS

DFC2A 318J2A 115VAC 19.8 25 18 1.00 7.2 42

DFC2H 324J2A 115VAC 24.6 30 22.2 1.00 9.3 58

LEGEND

MCA - Minimum Circuit Amps
MOCP - Maximum Overcurrent Protection

* If indoor unit is powered from outdoor terminal block, the MOCP for the

outdoor unit is for both sections.

NOTE: Specifications and performance data are subject to change with-

out notice.

FAN MO-

TOR

AMPS

COM-

PRESSOR

AMPS

COMPRESSOR

LOCKED ROTOR

AMPS

AMPS

3095897

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Fig. 13 — System Wiring Schematic DFF2HH09J1A, DFF2HH12J1A FAN COIL WITH DFC2H318J2A, DFC2H324J2A Condensing Unit

12

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Fig. 14 — System Wiring Schematic DFF2AH09J1A, DFF2AH12J1A FAN COIL WITH DFC2H318J2A, DFC2A324J2A Condensing Unit

13

START−UP

System Checks

1. Conceal the tubing where possible.

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

3. Ensure all tubing and connections are properly insulated.

4. Fasten tubes to the outside wall.

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

6. Connect the air conditioner to the power source and turn it
on.

7. Check all air conditioner operating modes. Refer to Own­er’s Manual for operating details.

INDOOR UNIT

1. Do all the remote controller buttons function properly?

2. Do the display panel lights work properly?

3. Does the air deflection louver function properly?

4. Does the drainage work?

OUTDOOR UNIT

1. Are there unusual noises or vibrations during operation?

2. Is noise, drain water or airflow from the unit likely to dis­turb the neighbors?

3. Are there any gas leaks?

EXPLAIN THE FOLLOWING ITEMS TO THE CUSTOMER,
WITH THE AID OF THE OWNER’S MANUAL:

1. How to turn the 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 the other features of the
remote controller and display panel.

2. How to remove and clean the air filter.

3. How to set the air deflection louver.

4. Explain care and maintenance.

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

CARE AND MAINTENANCE

The following may be performed by the equipment owner.

Outdoor Units

!

WARNING

dirt and debris from drain holes in base of unit. Fan mo­tors are waterproof.

Indoor Units

!

WARNING

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

To avoid the possibility of electric shock, before performing
any cleaning and maintenance operations, always turn off
power to the system by pressing the ON/OFF button on the
remote control and turn off the separate disconnect switch
located near the unit.

If the indoor unit is on a separate switch, be sure to turn this
disconnect off as well.

!

CAUTION

COMPONENT DAMAGE HAZARD
Failure to follow this may result in unit component damage.

Do not wash filter in water over 120_F (to avoid
shrinkage). Do not expose filter to fire (to avoid fire
damage). Do not expose filter to direct sunlight. Clean filter
more frequently when air is extremely dirty.

!

WARNING

ELECTRICAL SHOCK, FIRE COMPONENT DAMAGE
HAZARD
Failure to follow this warning could result in personal
injury, death and or property damage.

Do not attempt to clean or service components in control
box.

To Clean the Indoor Unit Front Panel — if the front panel of
the unit becomes dirty or smudged, wipe the out−side of the panel
with a soft dry cloth. Use a mild liquid deter−gent and wipe off
carefully with a dry cloth.

To Clean Indoor Coil — To clean the coil, remove indoor unit
front panel and vacuum the coil fins, using care not to bend or
damage fins.

LUBRICATION — The indoor−fan, automatic air sweep, and the
outdoor−fan motors are factory lubricated and require no oiling.

Air Filters for Indoor Units

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

Before performing recommended maintenance, be sure unit
main power switch is turned off.

CLEANING COILS — Coil should be washed out with
water or blown out with compressed air. Clean coil annu­ally or as required by location and outdoor air condi­tions. Inspect coil monthly and clean as required. Fins
are not continuous through coil sections. Dirt and debris
may pass through first section, become trapped between
the row of fins and restrict outdoor unit airflow. Use a
flashlight to determine if dirt or debris has collected be­tween coil sections. Clean coil as follows:

1. Turn off unit power and install lockout tag.

2. Using a garden hose or other suitable equipment, flush
coil from the outside to remove dirt. Be sure to flush all

!

CAUTION

COMPONENT DAMAGE HAZARD
Failure to follow this caution may result in unit component
damage.

Operating your system with dirty air filters may damage the
indoor unit and, in addition, can cause reduced
performance, intermittent system operation, frost build up
on the indoor coil, and blown fuses. Inspect and clean or
replace the air filters monthly.

TO REMOVE AIR FILTERS — Open the unit’s front panel by
lifting the lower part and pulling it gently outward and upward.
Pull out the filters.

TO CLEAN OR REPLACE FILTERS — Filters can be
vacuumed or washed in warm water. Shake filter to remove any
excess water, and replace it back. If the filter has begun to break

14

down or is torn, replace it. Replacement filters are available
through a local dealer.

SERVICE

The following should be performed by a qualified service
technician.

Clean Condensate Drains — Clean all drains and drain pans at
the start of each cooling season. Check the flow by pouring water
into the drain.

Clean or Replace Drain Pan — The drain pan should only be
cleaned or replaced by a qualified service technician.

1. Place a plastic sheet on the floor to catch any water that
may spill from the drain pan.

2. Remove the intake grille and distribution assembly.

3. Remove the condensate water in the drain pan by letting
water drain into a 3−gallon bucket.

15

TROUBLESHOOTING (Tables 6−8, and Fig. 15)

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

Be sure to check for broken wires or loose cable lugs before
troubleshooting system.

LAMP STATUS

INDICATION CORRECTION ACTION

1 Flash Faulty TH1 Sensor

2 Flashes Faulty TH2 Sensor

3 Flashes Low Pressure

4 Flashes High Pressure

5 Flashes Low Voltage

6 Flashes High Voltage

!

WARNING

Table 6—Service Indicators

Check the TH1 thermistor for correct resistance.

Check for proper connection.

Replace thermistor if necessary.

Check the TH2 thermistor for correct resistance.

Check for proper connection.

Replace thermistor if necessary.

Check system pressures.

Check refrigerant charges.

Check thermistors (TH1 and TH2) for correct resistance.

Check system pressures.

Check refrigerant charges.

Check thermistors (TH1 and TH2) for correct resistance.

Check operating voltage.

Check electrical connections.

Check operating voltage.

Check electrical connections.

POWER LED.
OFF WHEN SYSTEM IS
OPERATING AND FLASHES
WHEN SYSTEM IS IN ERROR.
(DOES NOT INDICATE ERROR CODE)

CLEAN FILTER INDICATOR
FLASHED AFTER 250 HOURS
OF OPERATION

Fig. 15 — Indicator Lights

16

OPERATION LED.
INDICATES ERROR

Table 7—DFS2A/DFS2H Thermistor TH−1, TH−2, and TH−3 Temperature to Resistance Conversion

TEMPERATURE

( F)

−4.0 −20

−2.2 −19

−0.4 −18

1.4 −17

3.2 −16

5.0 −15

6.8 −14

8.6 −13

10.4 −12

12.2 −11

14.0 −10

15.8 −9

17.6 −8

19.4 −7

21.2 −6

23.0 −5

24.8 −4

26.6 −3

28.4 −2

30.2 −1

32.0 0

33.8 1

35.6 2

37.4 3

39.2 4

41.0 5

42.8 6

44.6 7

46.4 8

48.2 9

50.0 10

51.8 11

53.6 12

55.4 13

57.2 14

59.0 15

60.8 16

62.6 17

64.4 18

66.2 19

68.0 20

69.8 21

71.6 22

73.4 23

75.2 24

77.0 25

78.8 26

80.6 27

82.4 28

84.2 29

86.0 30

87.8 31

89.6 32

91.4 33

93.2 34

NOTE: Resistance tolerance ± 3%.

TEMPERATURE

( C)

TEMPERATURE

TOLERANCE

( F)

TEMPERATURE

TOLERANCE

( C)

MINIMUM

RESISTANCE

(KW)

MEAN

RESISTANCE

(KW)

±2.0 ±1.1 30.89 32.44 34.05

±2.0 ±1.1 29.46 30.93 32.45

±2.0 ±1.1 28.12 29.51 30.94

±2.0 ±1.1 26.84 28.16 29.51

±2.0 ±1.1 25.64 26.88 28.15

±2.0 ±1.1 24.49 25.66 26.87

±2.0 ±1.1 23.40 24.52 25.66

±2.0 ±1.1 22.38 23.43 24.50

±2.0 ±1.1 21.40 22.39 23.41

±2.0 ±1.1 20.47 21.41 22.38

±1.8 ±1.0 19.59 20.48 21.40

±1.8 ±1.0 18.74 19.59 20.45

±1.8 ±1.0 17.94 18.74 19.56

±1.8 ±1.0 17.17 17.93 18.71

±1.8 ±1.0 16.44 17.16 17.90

±1.8 ±1.0 15.75 16.43 17.13

±1.8 ±1.0 15.10 15.74 16.40

±1.8 ±1.0 14.47 15.08 15.71

±1.8 ±1.0 13.87 14.46 15.05

±1.8 ±1.0 13.31 13.86 14.42

±1.8 ±1.0 12.77 13.29 13.83

±1.8 ±1.0 12.25 12.74 13.25

±1.8 ±1.0 11.75 12.22 12.70

±1.8 ±1.0 11.28 11.73 12.18

±1.8 ±1.0 10.83 11.25 11.68

±1.8 ±1.0 10.40 10.80 11.21

±1.8 ±1.0 9.986 10.370 10.76

±1.8 ±1.0 9.595 9.960 10.33

±1.8 ±1.0 9.222 9.569 9.921

±1.8 ±1.0 8.866 9.196 9.530

±1.8 ±1.0 8.526 8.840 9.157

±1.8 ±1.0 8.197 8.496 8.797

±1.8 ±1.0 7.883 8.167 8.453

±1.6 ±0.9 7.583 7.853 8.125

±1.6 ±0.9 7.296 7.553 7.812

±1.6 ±0.9 7.022 7.267 7.513

±1.6 ±0.9 6.761 6.993 7.227

±1.6 ±0.9 6.510 6.731 6.954

±1.6 ±0.9 6.271 6.481 6.693

±1.6 ±0.9 6.042 6.242 6.444

±1.6 ±0.9 5.822 6.013 6.205

±1.6 ±0.9 5.611 5.793 5.975

±1.6 ±0.9 5.408 5.581 5.755

±1.6 ±0.9 5.214 5.379 5.544

±1.6 ±0.9 5.028 5.185 5.343

±1.6 ±0.9 4.850 5.000 5.150

±1.6 ±0.9 4.675 4.821 4.968

±1.6 ±0.9 4.508 4.650 4.793

±1.6 ±0.9 4.347 4.486 4.626

±1.8 ±1.0 4.193 4.329 4.466

±1.8 ±1.0 4.046 4.179 4.312

±1.8 ±1.0 3.904 4.033 4.163

±1.8 ±1.0 3.767 3.894 4.020

±1.8 ±1.0 3.637 3.760 3.884

±1.8 ±1.0 3.511 3.631 3.752

MAXIMUM

RESISTANCE

(KW)

17

Table 7 —DFS2A/DFS2H Thermistor TH−1, TH−2, and TH−3 Temperature to Resistance Conversion (Cont.)

TEMPERATURE

( F)

95.0 35

96.8 36

98.6 37

100.4 38

102.2 39

104.0 40

105.8 41

107.6 42

109.4 43

111.2 44

113.0 45

114.8 46

116.6 47

118.4 48

120.2 49

122.0 50

123.8 51

125.6 52

127.4 53

129.2 54

131.0 55

132.8 56

134.6 57

136.4 58

138.2 59

140.0 60

141.8 61

143.6 62

145.4 63

147.2 64

149.0 65

150.8 66

152.6 67

154.4 68

156.2 69

158.0 70

TEMPERATURE

( C)

NOTE: Resistance tolerance ± 3%.

TEMPERATURE

TOLERANCE

( F)

TEMPERATURE

TOLERANCE

( C)

MINIMUM

RESISTANCE

(KW)

MEAN

RESISTANCE

(KW)

±1.8 ±1.0 3.391 3.508 3.626

±2.0 ±1.1 3.275 3.390 3.505

±2.0 ±1.1 3.164 3.276 3.389

±2.0 ±1.1 3.058 3.167 3.277

±2.0 ±1.1 2.956 3.062 3.169

±2.0 ±1.1 2.857 2.961 3.066

±2.0 ±1.1 2.762 2.864 2.966

±2.0 ±1.1 2.671 2.770 2.870

±2.2 ±1.2 2.583 2.679 2.777

±2.2 ±1.2 2.498 2.593 2.688

±2.2 ±1.2 2.417 2.509 2.602

±2.2 ±1.2 2.339 2.429 2.520

±2.2 ±1.2 2.264 2.352 2.441

±2.3 ±1.3 2.192 2.227 2.364

±2.3 ±1.3 2.122 2.206 2.291

±2.3 ±1.3 2.055 2.137 2.220

±2.3 ±1.3 1.990 2.070 2.151

±2.3 ±1.3 1.928 2.006 2.085

±2.3 ±1.3 1.867 1.943 2.021

±2.3 ±1.3 1.809 1.883 1.959

±2.5 ±1.4 1.753 1.826 1.900

±2.5 ±1.4 1.699 1.770 1.842

±2.5 ±1.4 1.647 1.717 1.787

±2.5 ±1.4 1.597 1.665 1.734

±2.5 ±1.4 1.549 1.615 1.683

±2.5 ±1.4 1.503 1.567 1.633

±2.7 ±1.5 1.458 1.521 1.585

±2.7 ±1.5 1.414 1.476 1.539

±2.7 ±1.5 1.372 1.432 1.494

±2.7 ±1.5 1.332 1.391 1.451

±2.7 ±1.5 1.293 1.350 1.409

±2.9 ±1.6 1.255 1.311 1.369

±2.9 ±1.6 1.219 1.274 1.330

±2.9 ±1.6 1.184 1.237 1.292

±2.9 ±1.6 1.150 1.202 1.256

±2.9 ±1.6 1.117 1.168 1.221

MAXIMUM

RESISTANCE

(KW)

18

Table 8—General System Troubleshooting Guide

SYMPTOM

Unit Fails to Start. Power supply from outdoor unit to indoor unit is

Only Indoor Fan Works
when Cooling or Heat­ing is Desired. NOTE:
Indoor fan runs contin­uously in cooling mode.

Only Indoor Fan Motor
and Outdoor Fan Motor
are Working. No Cool­ing and/or Heating
Takes Place.

No Air Supply at Indoor
Unit (Compressor Op­erates).

Low Capacity. Lack of refrigerant. Ice formation on the evapora-

In Heat Mode, Only
Compressor Runs. Out­door and Indoor Fan
Motors are Stopped.

Water Accumulates
and Overflows from
Evaporator Drain Pan.

Unit Does Not Operate
in Desired Mode.

not connected.
Power supply to unit not connected (POWER
LED Off).

Fuse blown (POWER LED Off). Reset circuit breaker or replace line fuse.

ON/SEND button has not been pressed. Press ON/SEND button on remote control.

Indoor unit does not receive transmitted com­mands.

The selected mode is Fan Only, or Cool when
heating is desired.

Temperature is set to a value which is too high (in
Cool mode).

Overload safety device on compressor is cut out
due to high temperature.

Compressor run capacitor is burnt. Replace compressor run capacitor.

Compressor winding shorted. Replace compressor.

Indoor fan motor is blocked or turns slowly. 1. Check voltage. Repair wiring if necessary.

Indoor fan motor capacitor is burnt. Replace indoor fan motor capacitor.

Indoor fan motor winding is burnt. Replace indoor fan motor.

In Heat mode: Delayed start for indoor fan motor. Normal software delay (maximum of 20 sec).

Clogged air filters. Clean filters.

tor coil.

Clogged air filters. Clean filters.

A/C operating in defrost cycle. Wait 10 minutes (maximum) until the unit resumes normal opera-

Drain pan pipe or hose is clogged or the spout of
drain pan is clogged.

The unit is in the Auto, (emergency) mode. Push button once to cancel Auto, (emergency) mode.

Faulty remote control settings. 1. If remote control symbols respond to the commands correctly,

PROBABLE CAUSE CORRECTIVE ACTION

Check for proper connection of power at disconnect.

Make sure that nothing is blocking the remote control transmis­sion to the unit.

Check if the remote control is in the desired mode. If not, select
the correct mode (refer to User manual). Also note that every 15
minutes (maximum) the compressor will be switched minimally
on for 3 minutes.

Observe the temperature setting on the remote control. Also note
that each 15 minutes (maximum), the compressor will be
switched on minimally for 3 minutes.

Switch off power and try again after one hour.

2. Check indoor fan wheel if tight on motor shaft. Tighten if nec­essary.

Unit must be charged (according to the nameplate) after local­izing the gas leak.

tion.

Disassemble plastic drain pipe from spout of evaporator drain
pan. Flush with clean water.

check the unit ID Code (Standard or Alternative). Refer to
“Changing Unit ID Code” in the Owner’s Manual.

Remote control low battery. Replace remote control batteries.

The Unit Receives Inter­ference from Other Re­mote Control or the Re­mote Control Interferes
with Other Instruments.

Common Infrared Code. Modify the Remote Control IR transmission code.

IMPORTANT:
The units are designed to work in heat mode only down to −10_C (14_F) outdoor ambient temperature.
If at starting time outdoor temperature is equal or lower than −10_C (14_F) the unit will not start and the filter led will flash five

(5) times to indicate that low temperature protection is activated.

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

2. If Cool commands are OK, but Heat symbol is skipped on
LCD, refer to setting the remote to cooling or heat pump on the
Owner’s Manual.

3. Replace remote control.

Refer to “Changing Unit ID Code” in the Owner’s Manual.

International Comfort Products, LLC

Lewisburg, Tennessee 37091

19