International comfort products DFS2A318J2A Dimensions and installation guide

Cooling Model Heat Pump
DFS2A318J2A DFS2H318J2A
DFS2A324J2A DFS2H324J2A DFS2A/H 2X09, 2X12
Duct Free Systems
51302618919−B NOV 06
421 01 9219 00
R−22
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. . . . . . . . . . . . . . . . . . . . . . . .
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.
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 manu-
al 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.
Signal Words in Manuals
The signal word WARNING is used throughout this
manual in the following manner:
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
Safety Labeling and Signal Words
!
CAUTION
WARNING
!
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 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.

2
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.
SConsult local building codes and National Electrical Code
(NEC, U.S.A.) for special installation requirements.
Max. cable length. Total voltage drop should not exceed
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)
SUse 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.
SIndoor 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.
SDo not install indoor units near a direct source of heat such
as direct sunlight, steam or flame.
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.
CAUTION
!
LEFT (min.)
6" (0.15m)
TOP (min.)
2" (0.6m)
REAR (min.)
6" (0.15m)
RIGHT (min.)
2" (0.6m)
FRONT (min.)
2" (0.6m)
Fig. 1 —DFC2A/H318, 324 Outdoor Unit Clearances

3
Table 1—Parts List — High Wall Units
ITEM QTY DIAGRAM
Mounting Bracket
Long Screws
Outdoor Sensor
Connecting
Cable
Absorption Cushions
Electric Terminals
Remote Controller
Mounting Bracket
Remote Controller
and Batteries
Insulation for
Indoor Fittings
Owner’s Manual
Wall−mounted
Receiver RTX
2 X 1
2 X 8
2 X 1
2 X 1
2 X 1
2 X 1
2 X
1 Mounting
Bracket with 2 screws
2 X 8
4
1
(OPTIONAL)
(Not Included)
DFF2A/DFF2H 09, 12
(Available for HEAT PUMP ONLY)
NADA001TW

4
Table 2—Physical Data −Cooling Only
INDOOR UNIT 2 X DFF2AH09J1A 2 X DFF2AH12J1A
COOLING CAPACITY (Btuh) SEER 2 X 9,000
13.0
2 X 11,400
13.0
SYSTEM CHARGE (Ib)* 2 X 2.4 2 X 3.1
MOISTURE REMOVAL (pt/hr) 2 X 2.6 2 X 4.5
AIRFLOW (3 Speeds)
High / Med. / Low Cfm
2 X 350 / 2 X 280 / 2 X 220 2 X 350 / 2 X 280 / 2 X 220
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
Vert Lift/Vert Drop/Max Length (ft)
30/30/50 30/30/50
NOMINAL LINE SIZING
Mixed Phase...Suction (in.)
1/4...1/2 1/4...1/2
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 2 X DFF2AH09J1A 2 X DFF2AH12J1A
COOLING CAPACITY (Btuh)
SEER
2 X 9,000
13.0
2 X 11,400
13.0
HEATING CAPACITY (Btuh)
HSPF
17,200
7.7
23,600
7.7
SYSTEM CHARGE (Ib)* 2 X 2.4 2 X 3.1
MOISTURE REMOVAL (pt/hr) 2 X 2.6 2 X 4.5
AIRFLOW (3 Speeds)
High / Med. / Low Cfm
2 X 350 / 2 X 280 / 2 X 220 2 X 350 / 2 X 280 / 2 X 220
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
Vert Lift/Vert Drop/Max Length (ft)
30/30/50 30/30/50
NOMINAL LINE SIZING
Mixed Phase...Suction (in.)
1/4...1/2 1/4...1/2
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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Fig. 2 —Indoor Unit Clearances
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 con-
nected to the back of the indoor unit’s base with screws.
2. Position the mounting bracket on the wall and level it us-
ing a spirit level (see Fig. 2 for minimum required clear-
ance 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 re-
frigerant 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 seal-
ant material.
Fig. 3 —Refrigerant Lines
G-2
270 125
260
45
9
45
90
80
635
450
250
66
54
A
09, 12
ALL DIMENSIONSARE IN mm
G-2
10.63 4.92
10.24
1.77
0.35
1.77
3.5
3.15
25
17.72
9.84
2.6
2.1
A
09, 12
ALL DIMENSIONSARE IN inches
2.5
64
Fig. 4 —Mounting Bracket DFF2A/DFF2H 09, 12
2.5-IN.
Fig. 5 —Drill Holes

8
WIRE THE INDOOR UNIT
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 reassem-
ble.
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.
SPull downwards and outwards on the bottom of the grille
and gently raise the frame of the top of the unit.
SOnce 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.
SRoute the interconnecting unit’s electric cable and the out-
door sensor cable towards the lower right hand corner of the
indoor unit.
SMake 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.
SSecure the control cables to the strain relief.
SFor heat pump systems only, connect the outdoor sensor
TH3 to its mating black terminal. See Fig. 9.
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.
WARNING
!
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.
Fig. 6 —Remove Grille Insert
FILTER
IR
RECEIVER
POWER/AIRCOND TIMER
FUSE
AUTO/OFF
FILTERRESET
SERVICELED
POWER/AIRCOND TIMER
FUSE
AUTO/OFF
FILTERRESET
SERVICELED
AUTO/OFF
FILTERRESET
SERVICELED
Fig. 7 —Remove Control Cover
Fig. 7a —Remove the screws from the air discharge
opening.
Mount the indoor unit on the mounting bracket
Gently push with the arrow direction
Fig. 8 —Indoor Unit Mounting
Standard Dip Switches
status from the factory
Inter unit
terminal block
30VDC
Display
Connection
TH1
TH2
TH3
(Heat Pump Only)
Inter unit cable clamp
HEAT PUMP
Model−2 X 12 DIP Switches location
(on the control box side)
HEAT PUMP
Model−2 X 09 DIP Switches location
(on the control box side)
COOLING ONLY
Model−2 X 12 DIP Switches location
(on the control box side)
COOLING ONLY
Model−2 X 09 DIP Switches location
(on the control box side)
Fig. 9 —Outdoor Sensor Connection

9
ATTACH THE REMOTE CONTROLLER MOUNTING
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 brack-
et.
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
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 (OUT-
DOOR 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
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.
4 ABSORPTION CUSHION TO
BE PUT UNDER EACH LEG
INTER UNIT
TERMINAL BLOCK
N L1
115VA C
1
2
3
4
5
24VAC
FAN(H)
FAN(L)
R.V.S
COMP.
COMMON
1
2
3
4
5
24VAC
FAN(H)
FAN(L)
R.V.S
COMP.
COMMON
1
2
METAL CONDUIT
CONNECTION PLATE
1
2
3
4
5
24 VAC
FAN (H)
FAN (L)
R.V.S
COMP.
COMMON
TH3 SENSOR
(HEAT PUMP ONLY)
POWER SUPPLY
CABLE
INTER UNIT CABLE
N L1
115 VA C
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
HIGH/LOW
VOLTAGE METAL
BARRIER
POWER SUPPLY
TERMINAL BLOCK
Fig. 12 —Legs Mounting Base and Wiring Outdoor
Units
Models: DFC2A/H318J2A, DFC2A/H324J2A

10
OFF ON TIMER
IR RECEIVER FILTER
PLASTIC CONTROL
COVER
SERVICE LED
Operation push button for
automatic operation (23°C/73°F),
turning the a/c OFF, canceling
the malfunction indication,
and resetting the filter LED.
INDOOR UNIT 2 X 09, 2 X 12
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 con-
nection 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 insu-
lated 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.
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, lubri-
cate 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.
Leak Test — Leak test all fittings with appropriate test
equipment.

11
Table 4—Electrical Data, Indoor Units — 30VDC
UNIT VOLTAGE MCA* MOCP* FULL
LOAD
AMPS
FAN MO-
TOR
AMPS
COM-
PRESSOR
AMPS
COMPRESSOR
LOCKED ROTOR
AMPS
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
FAN MO-
TOR
AMPS
COM-
PRESSOR
AMPS
COMPRESSOR
LOCKED ROTOR
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.
3095897

12
A-18932520315
pmuptaeHmargaiDgniriW21X2/90X2sledoM
1BT
GR/YEL
BLK
WHT
VTLH
KLB
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SVR
KLB
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BRN
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BT
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COMP 1
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HLTV
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Fig. 13 —System Wiring Schematic DFF2HH09J1A, DFF2HH12J1A FAN COIL WITH DFC2H318J2A, DFC2H324J2A Condensing Unit

13
A-28932520315
ylnOgnilooCmargaiDgniriW21X2/90X2sledoM
1BT
GR/YEL
BLK
WHT
VTLH
KLB
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BT
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16
5432
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NI
)+(tuOCD
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)-(NTRCD
CD tuO
BT
KLB
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V.T.L.H
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HLTV
COMP 1
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DC RTN
FAN
2
2
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1BT
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Fig. 14 —System Wiring Schematic DFF2AH09J1A, DFF2AH12J1A FAN COIL WITH DFC2H318J2A, DFC2A324J2A Condensing Unit

14
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 Own-
er’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 dis-
turb 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 cool-
ing, 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
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.
!WARNING
CLEANING COILS — Coil should be washed out with
water or blown out with compressed air. Clean coil annu-
ally or as required by location and outdoor air condi-
tions. 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 be-
tween 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
dirt and debris from drain holes in base of unit. Fan mo-
tors are waterproof.
Indoor Units
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.
WARNING
!
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.
CAUTION
!
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.
WARNING
!
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
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.
CAUTION
!
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

15
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.

16
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.
!WARNING
Table 6—Service Indicators
LAMP STATUS INDICATION CORRECTION ACTION
1 Flash Faulty TH1 Sensor
Check the TH1 thermistor for correct resistance.
Check for proper connection.
Replace thermistor if necessary.
2 Flashes Faulty TH2 Sensor
Check the TH2 thermistor for correct resistance.
Check for proper connection.
Replace thermistor if necessary.
3 Flashes Low Pressure
Check system pressures.
Check refrigerant charges.
Check thermistors (TH1 and TH2) for correct resistance.
4 Flashes High Pressure
Check system pressures.
Check refrigerant charges.
Check thermistors (TH1 and TH2) for correct resistance.
5 Flashes Low Voltage Check operating voltage.
Check electrical connections.
6 Flashes High Voltage Check operating voltage.
Check electrical connections.
OPERATION LED.
INDICATES ERROR
CLEAN FILTER INDICATOR
FLASHED AFTER 250 HOURS
OF OPERATION
POWER LED.
OFF WHEN SYSTEM IS
OPERATING AND FLASHES
WHEN SYSTEM IS IN ERROR.
(DOES NOT INDICATE ERROR CODE)
Fig. 15 —Indicator Lights

17
Table 7—DFS2A/DFS2H Thermistor TH−1, TH−2, and TH−3 Temperature to Resistance Conversion
TEMPERATURE
( F)
TEMPERATURE
( C)
TEMPERATURE
TOLERANCE
( F)
TEMPERATURE
TOLERANCE
( C)
MINIMUM
RESISTANCE
(KW)
MEAN
RESISTANCE
(KW)
MAXIMUM
RESISTANCE
(KW)
−4.0 −20 ±2.0 ±1.1 30.89 32.44 34.05
−2.2 −19 ±2.0 ±1.1 29.46 30.93 32.45
−0.4 −18 ±2.0 ±1.1 28.12 29.51 30.94
1.4 −17 ±2.0 ±1.1 26.84 28.16 29.51
3.2 −16 ±2.0 ±1.1 25.64 26.88 28.15
5.0 −15 ±2.0 ±1.1 24.49 25.66 26.87
6.8 −14 ±2.0 ±1.1 23.40 24.52 25.66
8.6 −13 ±2.0 ±1.1 22.38 23.43 24.50
10.4 −12 ±2.0 ±1.1 21.40 22.39 23.41
12.2 −11 ±2.0 ±1.1 20.47 21.41 22.38
14.0 −10 ±1.8 ±1.0 19.59 20.48 21.40
15.8 −9±1.8 ±1.0 18.74 19.59 20.45
17.6 −8±1.8 ±1.0 17.94 18.74 19.56
19.4 −7±1.8 ±1.0 17.17 17.93 18.71
21.2 −6±1.8 ±1.0 16.44 17.16 17.90
23.0 −5±1.8 ±1.0 15.75 16.43 17.13
24.8 −4±1.8 ±1.0 15.10 15.74 16.40
26.6 −3±1.8 ±1.0 14.47 15.08 15.71
28.4 −2±1.8 ±1.0 13.87 14.46 15.05
30.2 −1±1.8 ±1.0 13.31 13.86 14.42
32.0 0 ±1.8 ±1.0 12.77 13.29 13.83
33.8 1 ±1.8 ±1.0 12.25 12.74 13.25
35.6 2 ±1.8 ±1.0 11.75 12.22 12.70
37.4 3 ±1.8 ±1.0 11.28 11.73 12.18
39.2 4 ±1.8 ±1.0 10.83 11.25 11.68
41.0 5 ±1.8 ±1.0 10.40 10.80 11.21
42.8 6 ±1.8 ±1.0 9.986 10.370 10.76
44.6 7 ±1.8 ±1.0 9.595 9.960 10.33
46.4 8 ±1.8 ±1.0 9.222 9.569 9.921
48.2 9 ±1.8 ±1.0 8.866 9.196 9.530
50.0 10 ±1.8 ±1.0 8.526 8.840 9.157
51.8 11 ±1.8 ±1.0 8.197 8.496 8.797
53.6 12 ±1.8 ±1.0 7.883 8.167 8.453
55.4 13 ±1.6 ±0.9 7.583 7.853 8.125
57.2 14 ±1.6 ±0.9 7.296 7.553 7.812
59.0 15 ±1.6 ±0.9 7.022 7.267 7.513
60.8 16 ±1.6 ±0.9 6.761 6.993 7.227
62.6 17 ±1.6 ±0.9 6.510 6.731 6.954
64.4 18 ±1.6 ±0.9 6.271 6.481 6.693
66.2 19 ±1.6 ±0.9 6.042 6.242 6.444
68.0 20 ±1.6 ±0.9 5.822 6.013 6.205
69.8 21 ±1.6 ±0.9 5.611 5.793 5.975
71.6 22 ±1.6 ±0.9 5.408 5.581 5.755
73.4 23 ±1.6 ±0.9 5.214 5.379 5.544
75.2 24 ±1.6 ±0.9 5.028 5.185 5.343
77.0 25 ±1.6 ±0.9 4.850 5.000 5.150
78.8 26 ±1.6 ±0.9 4.675 4.821 4.968
80.6 27 ±1.6 ±0.9 4.508 4.650 4.793
82.4 28 ±1.6 ±0.9 4.347 4.486 4.626
84.2 29 ±1.8 ±1.0 4.193 4.329 4.466
86.0 30 ±1.8 ±1.0 4.046 4.179 4.312
87.8 31 ±1.8 ±1.0 3.904 4.033 4.163
89.6 32 ±1.8 ±1.0 3.767 3.894 4.020
91.4 33 ±1.8 ±1.0 3.637 3.760 3.884
93.2 34 ±1.8 ±1.0 3.511 3.631 3.752
NOTE: Resistance tolerance ± 3%.

18
Table 7 —DFS2A/DFS2H Thermistor TH−1, TH−2, and TH−3 Temperature to Resistance Conversion (Cont.)
TEMPERATURE
( F)
TEMPERATURE
( C)
TEMPERATURE
TOLERANCE
( F)
TEMPERATURE
TOLERANCE
( C)
MINIMUM
RESISTANCE
(KW)
MEAN
RESISTANCE
(KW)
MAXIMUM
RESISTANCE
(KW)
95.0 35 ±1.8 ±1.0 3.391 3.508 3.626
96.8 36 ±2.0 ±1.1 3.275 3.390 3.505
98.6 37 ±2.0 ±1.1 3.164 3.276 3.389
100.4 38 ±2.0 ±1.1 3.058 3.167 3.277
102.2 39 ±2.0 ±1.1 2.956 3.062 3.169
104.0 40 ±2.0 ±1.1 2.857 2.961 3.066
105.8 41 ±2.0 ±1.1 2.762 2.864 2.966
107.6 42 ±2.0 ±1.1 2.671 2.770 2.870
109.4 43 ±2.2 ±1.2 2.583 2.679 2.777
111.2 44 ±2.2 ±1.2 2.498 2.593 2.688
113.0 45 ±2.2 ±1.2 2.417 2.509 2.602
114.8 46 ±2.2 ±1.2 2.339 2.429 2.520
116.6 47 ±2.2 ±1.2 2.264 2.352 2.441
118.4 48 ±2.3 ±1.3 2.192 2.227 2.364
120.2 49 ±2.3 ±1.3 2.122 2.206 2.291
122.0 50 ±2.3 ±1.3 2.055 2.137 2.220
123.8 51 ±2.3 ±1.3 1.990 2.070 2.151
125.6 52 ±2.3 ±1.3 1.928 2.006 2.085
127.4 53 ±2.3 ±1.3 1.867 1.943 2.021
129.2 54 ±2.3 ±1.3 1.809 1.883 1.959
131.0 55 ±2.5 ±1.4 1.753 1.826 1.900
132.8 56 ±2.5 ±1.4 1.699 1.770 1.842
134.6 57 ±2.5 ±1.4 1.647 1.717 1.787
136.4 58 ±2.5 ±1.4 1.597 1.665 1.734
138.2 59 ±2.5 ±1.4 1.549 1.615 1.683
140.0 60 ±2.5 ±1.4 1.503 1.567 1.633
141.8 61 ±2.7 ±1.5 1.458 1.521 1.585
143.6 62 ±2.7 ±1.5 1.414 1.476 1.539
145.4 63 ±2.7 ±1.5 1.372 1.432 1.494
147.2 64 ±2.7 ±1.5 1.332 1.391 1.451
149.0 65 ±2.7 ±1.5 1.293 1.350 1.409
150.8 66 ±2.9 ±1.6 1.255 1.311 1.369
152.6 67 ±2.9 ±1.6 1.219 1.274 1.330
154.4 68 ±2.9 ±1.6 1.184 1.237 1.292
156.2 69 ±2.9 ±1.6 1.150 1.202 1.256
158.0 70 ±2.9 ±1.6 1.117 1.168 1.221
NOTE: Resistance tolerance ± 3%.

19
Table 8—General System Troubleshooting Guide
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
Unit Fails to Start. Power supply from outdoor unit to indoor unit is
not connected.
Power supply to unit not connected (POWER
LED Off).
Check for proper connection of power at disconnect.
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 com-
mands.
Make sure that nothing is blocking the remote control transmis-
sion to the unit.
Only Indoor Fan Works
when Cooling or Heat-
ing is Desired. NOTE:
Indoor fan runs contin-
uously in cooling mode.
The selected mode is Fan Only, or Cool when
heating is desired.
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.
Temperature is set to a value which is too high (in
Cool mode).
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.
Only Indoor Fan Motor
and Outdoor Fan Motor
are Working. No Cool-
ing and/or Heating
Takes Place.
Overload safety device on compressor is cut out
due to high temperature.
Switch off power and try again after one hour.
Compressor run capacitor is burnt. Replace compressor run capacitor.
Compressor winding shorted. Replace compressor.
No Air Supply at Indoor
Unit (Compressor Op-
erates).
Indoor fan motor is blocked or turns slowly. 1. Check voltage. Repair wiring if necessary.
2. Check indoor fan wheel if tight on motor shaft. Tighten if nec-
essary.
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.
Low Capacity. Lack of refrigerant. Ice formation on the evapora-
tor coil.
Unit must be charged (according to the nameplate) after local-
izing the gas leak.
Clogged air filters. Clean filters.
In Heat Mode, Only
Compressor Runs. Out-
door and Indoor Fan
Motors are Stopped.
A/C operating in defrost cycle. Wait 10 minutes (maximum) until the unit resumes normal opera-
tion.
Water Accumulates
and Overflows from
Evaporator Drain Pan.
Drain pan pipe or hose is clogged or the spout of
drain pan is clogged.
Disassemble plastic drain pipe from spout of evaporator drain
pan. Flush with clean water.
Unit Does Not Operate
in Desired Mode.
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,
check the unit ID Code (Standard or Alternative). Refer to
“Changing Unit ID Code” in the Owner’s Manual.
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.
Remote control low battery. Replace remote control batteries.
The Unit Receives Inter-
ference from Other Re-
mote Control or the Re-
mote Control Interferes
with Other Instruments.
Common Infrared Code. Modify the Remote Control IR transmission code.
Refer to “Changing Unit ID Code” in the Owner’s Manual.
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.
International Comfort Products, LLC
Lewisburg, Tennessee 37091