International comfort products DFS2A318J2A Dimensions and installation guide

Cooling Model
DFS2A318J2A
DFS2A324J2A
Heat Pump
DFS2H318J2A
DFS2H324J2A
421 01 9219 00 I 51302618919-B NOV 06
DFS2A/H 2X09, 2X12
Duct Free Systems
Installation, Start-Up, and Service Instructions
CONTENTS SAFETY CONSIDERATIONS
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
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 mid on tags, stickers, mid 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.
TROUBLESHOOTING ........................ 16-19
Safety Labeling and Signal Words
DANGER, WARNING, CAUTION, and
NOTE
The signal words DANGER, WARNING, CAUTION, and
NOTE are used to identifylevels 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 labelsand 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 injuryor 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.
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 mav be more than one disconnect switch.
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.
• Consult 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 (18 111)
• 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.
• Indoor and outdoor units should be installed at a Mini-
mum length of 10 ft. apart. Maximum line length of 50 ft.
and veltical separation of 30 ft.
• Do not install indoor units near a direct source of heat such
as direct sunlight, steam or flame.
UNTF COMPONENT DAMAGE
Failure to follow this caution may result in damage to unit
components.
Do not bu_ 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 duNlg extended periods of system
shutdown.
Fig, 1 -- DFC2A/H318, 324 Outdoor Unit Clearances

Table 1--Parts List -- High Wall Units
ITEM QTY
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
2X1
2X8
2X1
2X8
2X
1 Mounting
Bracket with 2 screws
2X1
2X1
2X1
(OPTIONAL)
(Not Included)
DIAGRAM
DFF2A/DFF2H 09, 12
(Available for HEAT PUMP ONLY)
NADA001TW

INDOOR UNIT 2X DFF2AH12JIA
COOLING CAPACITY (Btuh) SEER 2 X 11,400
13.0
SYSTEM CHARGE (Ib)* 2 X 3.1
MOISTURE REMOVAL (pt/hr) 2 X 4.5
AIRFLOW (3 Speeds) 2 X 350 /2 X 280 /2 X 220
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
Table 2--Physical Data -Cooling Only
2X DFF2AH09JIA
2 X 9,000
13.0
2X2.4
2X2.6
2X350/2X280/2X220
OUTDOOR UNIT
TUBE CONNECTIONS
Vert Lift/Vert Drop/Max Length (ft)
NOMINAL LINE SIZING
Mixed Phase...Suction (in.)
COMPRESSOR TYPE
DIMENSIONS LxHxW(in.)
NET WEIGHT (Ib)
METERING TYPE
LEGEND
DFC2A318J2A DFC2A324J2A
30/30/50 30/30/50
1/4...1/2 1/4...1/2
Panasonic-2R13S126A6F Panasonic-2P17SR126B1A
35.5 X 49.5 X 12.6 35.5 X 49.5 X 12.6
226 228
Piston (Accurator) Piston (Accurator)
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 2X DFF2AH09JIA 2X DFF2AH12JIA
COOLING CAPACITY (Btuh) 2 X 9,000 2 X 11,400
SEER 13.0 13.0
HEATING CAPACITY (Btuh) 17,200 23,600
HSPF 7.7 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) 2 X 350/2 X 280/2 X 220 2 X 350/2 X 280/2 X 220
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
DFC2A318J2A DFC2A324J2A
30/30/50 30/30/50
1/4...1/2 1/4...1/2
Panasonic-2R13S126A6F Panasonic-2P17SR126B1A
35.5 X 49.5 X 12.6 35.5 X 49.5 X 12.6
226 228
Piston (Accurator) Piston (Accurator)
OUTDOOR UNIT
TUBE CONNECTIONS
Vert Lift/Vert Drop/Max Length (ft)
NOMINAL LINE SIZING
Mixed Phase...Suction (in.)
COMPRESSOR TYPE
DIMENSIONS LxHxW(in.)
SHIPPING WEIGHT (Ib)
METERING TYPE
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 0F (12.7 [_C to 51.6 [_C).

NOTES:
ICP
I. DIMENSIONS IN INCHES, [ ] ARE IN MILLIMETERS - DO NOT SCALE.
2, _ DIRECTION OF AIR FLOW.
3, REFRIGERANT, DRAIN AND POWERCONNECTIONS
MAY BE MADEREAR (LEFT OR RIGHT),
LEFT SIDE, RIGHT SIDE, OR BOTTOMLEFT.
[TOP VIEW]
-3.94 [I00] MIN.
/\
/
4
[I00] MIN. 11.81 [300] MIN.
MINIMUM CLEARANCE FOR SERVICE AND AIR FLOW E
INLET AIR
I
F
IIIIIIIIIII
[ LEFTSIDEVIEW F]LTERS
(OPEN COVER FOR ACCESS) IFRONTVIEWI IRIGHT SIDE VIEW J
3.0 DIA [76] A
FOR REFRIGERANT, DRAIN,
POWERAND SIGNAL LINES
-EVAPORATOR
COIL
INLET AIR
I_ COOLING
IN
BEAF_NG%
NOCKOUT FOR LEFT SIDE
REFRIGERANT, DRAIN, POWER
AND SIGNAL LINES
f
IIIIAIRS_II
"A" LINFRARE[ REMOTEOVERRIDE SWITCH
DRAIN 0.625 [15.B] - 2B'FLEX BOSE,
MALE BARB CONNECTION (PLASTIC)
[BOTTOM VIEW]
i SUCTION LINE CONNECTION
"G" MALE FLARE
A
I_L_
I' _ J rJ L_OU_OUNECONNECTION
"H" MALE FLARE
,/
KNOCKOUTFOR BOTTOM
REFRIGERANT,DRAIN,POWER
AND SIGNAL LINES
KNOCKOUT FOR RIGHT SIDE
REFRIGERANT, DRAIN, POWER
lAND SIGNAL LINES
E
1
o
o
m
r-
m
z
0
=
m
m

IAI B E C I D I E IF I G I Ji I J2 I
UNIT SIZE
DFC2A318J2AI 4_n I43 ln_ t _gR 796177F
DFC2A324J2AI49_36 I 4.3 t69 I 28.6 Z261 7.7_
DFC2H324J2A " "
ICP
,971 I 641 ,410, 612261 0 ,
oi ,;
i
I _ w
I'
AIR DISCHARGE
Mim TOP VIEW
6" [0,15M]
Min.
2' [0.6M]
,,g _,
/
LM MJ
FRONT VIEW
MINIMUM CLEARANCE_
SEE NOTE 1
"A"
1
0.7
[18MM] --
NOTES:
1 REQUIRED CLEARANCES, WITH COIL FACING WALL -ALLOW 6 MINIMUM
1 1WITH COIL FACING WALL -ALLOW 6 MINIMUM CLEARANCE ON COiL SIDE & END
AND 2 FEET MINIMUM CLEARANCE ON COMPRESSOR END FAN SIDE
12 WITH FAN FACING WALL -ALLOW 2 MINIMUM CLEARANCE ON FAN SIDE AND 6 ON COIL END,
AND 2 FEET MINIMUM CLEARANCE ON COMPRESSOR END COiL SIDE
13 ALLOW 2 FEET MINIMUM CLEARANCE OVER THE TOP OF UNIT
14 WITH MULTI-UNITAPPUCATtON, ARRANGE UNITS SO DISCHARGE OF ONE DOES NOT ENTER INLET OF
OTHER
2 DIMENSIONS iN PARENTHESIS ARE IN METRIC
3 BRACKET WITH 1 125 DiA HOLE FOR FIELD POWER SUPPLY
FIELD POWER CONNECTION &
CONTROL CONNECTION
UNDER THIS COVER
"P' DIA. VAPOR LINE ::
FLARESERVICECONNECTIONPORT N _ _
.25" FLARE CONNECTION _ 31
SERVICE PORT _.
(FROM LIQUID LINE) _1_ t
.25" FLARE CONNECTION_ _/_t_i "-_
"R" DIA. LIQUID LINE __
FLARE CONNECTION : ---1
P" DIA. VAPOR LINE
FLARE CONNECTION
SERVICE PORT 31
25' FLARE CONNECTION _
SERVICE PORT
(FROM LIQUID LINE)
.25" FLARE CONNECTION
"R" DIA. LIQUID LINE __ .
FLARE CONNECTION
-- SEE NOTE 3
°TYP
"K2"
"J2 .... M"
=TYP
"KI"
VIEW '_A'_
_EJ
_>
o-I
_m
o
o_
m
mcm
;0
Zoo
mc
co
m
o
m
co
, rn
<

J
J
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 m the re-
fiigerant line routblg 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
09, 12
G-2
09, 12
ALL DIMENSIONS ARE IN inches
G-2 ALL DIMENSIONS ARE iN mm
Fig. 4 -- Mounting Bracket DFF2A/DFF2H 09, 12
(Optiona_ for NEAT PBNP BYSTEfB$}
OUTDOOR SENSOR CABLE REFRIGERANT
\ LINES
_ t/2.1N. MIN
_T_lrAI -- DRAINAGE
INDOOR _.tl] OUTDOOR ELECTRICAL
- - _ - - CABLE TUBE
Fig. 5 -- Drill Holes

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.
• Pull downwards and outwards on the bottom of the grille
and gently raise the frame of the top of the unit.
• 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.
• Route the interconnecting unit's electric cable and the out-
door sensor cable towards the lower right hand corner of the
indoor unit.
• 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.
• Secure the control cables to the strain relief.
• For heat pump systems only, connect the outdoor sensor
TH3 to its mating black terminal. See Fig. 9.
J
f
j_
•/
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 firmlv 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.
_ili;
Gently push with the arrow direction
Fig. 8 -- Indoor Unit Mounting
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 X12 DIP Switches location
(on the control box side)
COOLING ONLY
Model-2 X09 DIP Switches location
(on the control box side)
Standard Dip Switches
status from the factory
Inter unit
terminal block
30VDC
Display
TH3
(Heat Pump Only)
Inter unit cable clamp
Fig. 9 -- Outdoor Sensor Connection

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
MOUNTING BRACKET
Fig. 10- Attach Mounting Bracket to the Wall
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.
POWER SUPPLY
(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
HIGH/LOW
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

INDOOR UNIT 2X09, 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.
AUTO/OFF
_=)FILTEJ
PLASTIC CONTROL
COVER
OFF ON ,_ T[MEI_
IR RECEIVER FILTER
SERVICE LED
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 V4
turn. Use the following specified torque, according to con-
nection size:
Mixed-Phase line: Suction line:
1/4 in.-(12.3 fit-lb.) 1/2 in.-(36 fit-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 nmst be checked and adjusted. Follow the steps
below.
1. Open the service port cap on the suction line valve (large
valve of unit No. i).
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.
10

Table 4_Electrical Data, Indoor Units -- 30VDC
UNIT VOLTAGE MCA* MOCP* FULL FAN MO- COM- COMPRESSOR
LOAD TOR PRESSOR LOCKED ROTOR
AMPS AMPS AMPS AMPS
DFF2AH 09JIA 30VDC N/A N/A 1.8 1.1 N/A N/A
DFF2HH 12JIA 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 terminN 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 FAN MO- COM- COMPRESSOR
LOAD TOR PRESSOR LOCKED ROTOR
AMPS AMPS AMPS AMPS
DFC2A 318J2A II5VAC 19.8 25 18 1.00 7.2 42
DFC2H 324J2A II5VAC 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
11

INDOOR UNIT ®
THlt tTi2 TH3
J6J7 J8
J18
1._2
Jt4
12
PPE _
lTo_ Jll
i._2
F-1
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F-I
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TAC 671 Main
_J Board
TAC 670 control
5130252398i-A
TB
FAN -, -_-_
H.LT.V - _RE_O
-12V BLK RED *_0VDC
r N MOTO
FAN1 BLUE
_IFAN2RgO J4 r_
FAN 3 BLK
_s
II OND;
II
I I
I1
LI N_
115VAC
Main AC Supply
Models2 X09/2X12 WiringDiagramHeatpump
OUTDOOR UNIT
BL. L._
®
i NLW
iiRv__,
COMP
DC RT_
:673
'Boarc K_
® j
GREEN
GREEN
_BR
*BR
*BLUE
*BLUE
*G_YEL
®
BLK
N BLUE
DC_ LI BR
_GREEN
0
TH3
RVS
BLK
BLK
ILTVI
*BLUE
cc@
_--_f_ _ TB
COMP.
v*OR
GND
FAN
MOTOR
TH3
RVS
BLK _BLK
BLK
®
TB 1_J1
K3
TAC673
:o_1Relay Board
o
GREEN
GREEN
co(i)
FAN
MOTOR
®TB
-_yEt.
_w__ - FAN
/_{!_ _H.LT.V
RED 12V
J1 BLK*12V
+30v WH
J4 J3
RED+30VDC FANI BLUE
BU_OCRTN i
YEL VSP FAN2 REO
BLOC -- _,j 14_-F,J
MOTOR _ FAN3 B_K
TAC672B
INDOOR UNITQ
J8 J7 J6
JIB ___
K5rTq t
-L_
Lr_LL,,Id
J_-" ljl:
STEF
K8 !,LL_
K9 i_L_
TAO 671 Main
Board
TAC670 control
LEGEND
CC -Compressor Capacitor
COMP*Compressor
FC -Fan Capacitor
GND *Ground
RVS *Reversing Valve Sehoid
HLTV -HeatingLow Tamp.Valve
TB -Terminal Block
BLDC * brushless DC
TH 1 =Return airsensor
TH 2-Indoor coil sensor
TH3 -Outdoor coil sensor
(_ - Indoor unit 1 circuit
(_) =Indoor unit 2circuit
"" -16 AWG
_ -14 AWG
* =12 AWG
ALL OTHER WIRES 18 AWG
0-Splice
•* Terminal(Unmarked)
-- Factory Wiring
...... Field Control Wiring
_._ Field Power Wiring
Fig, 13 -- System Wiring Schematic DFF2HHO9J1A, DFF2HH12J1A FAN COIL WITH DFC2H318J2A, DFC2H324J2A Condensing Unit

INDOORUNIT®
J6J7 J8
JiB
F-_._ FAN
LJ
_K_._--i'-_K_LLB.L._V
L- _ RVS
l._J
LJ
_
+30V WH
-]K8 FAN 1BLU
J._J
_'-_ K8 FAN 2 _
K7i'-I
TAB 671 Main
Board
TAC 670 contro{
51302523982-A
TB
r! _ "RE_
_EN
TB®
_BLDC
_MOTOR
GND
L1N_
115VAC
Main ACSupply
Models2X 09/2X 12 Wiring DiagramCoolingOnly
OUTDOOR UNIT
BL_ L_
®
J1 TB 1J[
FAN
TAB 673
Relay Board
GREEN
GREEN
BR
_BR
BLUE
BLUE
'GR/YEL
;®
BLK
BLUE
DC_ L1 BR
_GREEN
cc(
!'B
COMP.
_OR
GND
0 BLK
BLK
_BLUE
GR_EL
-] BLK
®
TB1Jl
BLK
BL KI TAC 673
L
(9
GREEN
i GREEN
ccQ
COMP, Q
BOE'I:
FC@
FAN FAN
MOTOR MOTOR
INDOOR UNITQ
OTB
OR
"RED R_I
TB_
RE_* 30VDC
y_L VSp
BLD_
MOTOR
m H,L.'KV
:L RMS
RED+12V
BLK-12V
+3OV WH
FAN 1BL_
FAN 2 RED
;ifTHI
J8 J7 J6
J18 ___
K5r73 l
KL_L,,.LJ
--_,2d
K9 iLLJ
K_i,L;J
TAB 674 Main
Board
TAC678control
LEGEND
CC -Compressor Capacitor
BOMP-Compressor
FC -Fan Capacitor
GRD -Ground
TB -Terminal Block
BLDB * brushless DB
TR t -Return airsensor
TH2 -Indoor coil sensor
-Indoorunitl circuit
_) - Indoor unit 2 circuit
-16AWG
rk4 AWG
-42 AWG
_L OTHER WIRES 48 AWG
0*Splice
•* Terminal(Unmarked)
-- Factory Wiring
...... Field Control Widng
_._ Field Power Wiring
Fig. 14 -- System Wiring Schematic DFF2AHO9JIA, DFF2AH12JIA FAN COIL WITH DFC2H318J2A, DFC2A324J2A Condensing Unit

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
Oil.
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 pow*erswitch is turned off.
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.
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 extremel'¢ dirty.
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
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 remox, e any
excess water, and replace it back. If the filter has begun to break
14

downoristorn,replaceit.Replacementfiltersareavailable
throughalocaldealer.SERVICE
The following should be performed by a qualified service
technician.
Clean Condensate Drains -- (;lean 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)
LAMP STATUS
1 Flash
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.
Table 6_Service Indicators
INDICATION
Faulty TH1 Sensor
2 Flashes Faulty TH2 Sensor
3Flashes Low Pressure
4 Flashes High Pressul_e
5Flashes Low Voltage
6Flashes High Voltage
CORRECTION ACTION
Check the THI 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 (THI and TH2) for correct resistance.
Check system pressures.
Check refrigerant charges.
Check thermistors (THI and TH2) for correct resistance.
Check operating voltage.
Check electrical connections.
Check operating voltage.
Check electrical connections.
OPERATION LED.
INDICATES ERROR
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

Table 7--DFS2A/DFS2H Thermistor TH-1, TH-2, and TH-3 Temperature to Resistance Conversion
TEMPERATURE
-4.0
-2.2
-0.4
1,4
3.2
5,0
6,8
8,6
19.4
12.2
14.0
15.8
17,6
19.4
21.2
23.0
24.8
26,6
28.4
39.2
32.0
33.8
35.6
37.4
39,2
41.0
42.8
44.6
46.4
48.2
59.0
51.8
53.6
55.4
57.2
59.0
69.8
62.6
64.4
66,2
68.0
69.8
71.6
73.4
75.2
77.0
78.8
89.6
82.4
84.2
86.0
87.8
89,6
91,4
93.2
NOTE: Resistance tolerance _+ 3%.
TEMPERATURE TEMPERATURE TEMPERATURE MINIMUM MEAN MAXIMUM
(_C) TOLERANCE TOLERANCE RESISTANCE RESISTANCE RESISTANCE
(_P) (_C) (K_) (K_) (K_)
-20 ±2.0 ±1.1 30.89 32.44 34.05
-19 +2.0 +1,1 29.46 30.93 32.45
-19 + 2.0 + 1.1 28.12 29.51 30.94
-17 ± 2.0 ± 1.1 26.84 28.16 29.51
-16 ± 2.0 ± 1.1 25.64 26.88 28.15
-15 +2.0 +1,1 24.49 25.66 26.87
-14 +2.0 +1,1 23.40 24.52 25.66
-13 ±2.0 ±1.1 22.38 23.43 24.50
-12 ±2.0 ±1.1 21.40 22.39 23.41
-11 +2.0 +1,1 20.47 21.41 22.38
-10 + 1.8 + 1.0 19.59 20.48 21.40
-9 ±1.8 ±1.0 18.74 19.59 20.45
-8 ±1.8 ±1.0 17.94 18.74 19.56
-7 +1.8 +1,0 17117 17193 18171
-6 +1.8 +1.0 16.44 17.16 17.90
-5 --+1.8 --+1.0 15.75 16.43 17.13
-4 ±1.8 ±1.0 15.10 15.74 16.40
-3 +1.8 +1.0 14.47 15.08 15.71
-2 + 1.8 + 1.0 13.87 14.46 15.05
-1 ±1.8 ±1.0 13.31 13.86 14.42
O --+1.8 --+1.0 12.77 13.29 13.83
1 +1.8 +1.0 12.25 12.74 13.25
2 +1.8 +1.0 11.75 12.22 12.70
3 --+1.8 --+1.0 11.28 11.73 12.18
4±1.8 ±1.0 10.83 11.25 11.68
5 +1.8 +1.0 10.40 10.80 11.21
6 +1,8 +1.0 9.986 10.370 10.76
7 +1.8 +1.0 9.595 9.960 10.33
8 +1.8 +1.0 9.222 9.569 9.921
9 ±1.8 ±1.0 8.866 9.196 9.530
10 ±1.8 ±1.0 8.526 8.840 9.157
11 +1.8 +1.0 8.197 8.496 8.797
12 +1.8 +1.0 7.883 8.167 8.453
13 ±1.8 ±0.6 7.583 7.853 8.125
14 --+1.8 --+0.6 7.296 7.553 7.812
15 +1.8 +0.6 7.022 7.267 7.513
16 +1.6 +0.9 6.761 6.993 7.227
17 ±1.6 --+0.9 6.510 6.731 6.954
18 ±1.6 ±0.9 6.271 6.481 6.693
19 +1.6 +0.9 6.042 6.242 6.444
20 +1.8 +o.6 5.822 6.013 6.205
21 ±1.6 ±0.9 5.611 5.793 5.975
22 ±1.6 ±0.9 5.408 5.581 5.755
23 +1.8 +0.6 5.214 5.379 5.544
24 +1.6 +0.9 5.028 5.185 5.343
25 _+1.8 ±0.9 4.850 5.000 5.150
26 ±1,6 ±0.9 4.675 4.821 4.968
27 +1.6 +o.e 4.508 4.650 4.793
28 +1.8 +0.9 4.347 4.486 4.626
29 ±1,8 ±1.0 4.193 4.329 4.466
30 ± 1.8 ±1.0 4.046 4.179 4.312
31 +1.8 +1.0 3.904 4.033 4.163
32 +1,8 +1.0 3.767 3.894 4.020
33 ±1,8 ±1.0 3.637 3.760 3.884
34 ±1.8 ±1.o 3.511 3.631 3.752
17

Table 7 --DFS2A/DFS2H Thermistor TH-1, TH-2, and TH-3 Temperature to Resistance Conversion (Cont.)
TEMPERATURE TEMPERATURE TEMPERATURE TEMPERATURE MINIMUM MEAN MAXIMUM
_F) (L_C) TOLERANCE TOLERANCE RESISTANCE RESISTANCE RESISTANCE
_F) (_C) (K_) (K_) (K_)
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 +2.6 +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
191.0 55 +2.5 +1.4 1.753 1.826 1.900
192.8 56 ±2.5 ±1.4 1.699 1.770 1.842
194.6 57 + 2.5 + 1.4 1.647 1.717 1.787
196.4 56 ±2.5 ±1.4 1.597 1.665 1.734
198.2 59 + 2.5 + 1.4 1.549 1.615 1.683
140.0 6O --+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 ± 1.8 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 76 +2.9 +1.6 1.117 1.168 1.221
NOTE: Resistance tolerance _+ 3%.
18

Table 8---General System Troubleshooting Guide
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
Unit Fails to Start. Power supply from outdoor unit to indoor unit is Check for proper connection of power at disconnect.
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 com- Make sure that nothing is blocking the remote control transmis-
mands, sion to the unit.
Only Indoor Fan Works The selected mode is Fan Only, or Cool when Check if the remote control is in the desired mode. If not, select
when Cooling or Heat- heating is desired, the correct mode (refer to User manual). Also note that every 15
ing is Desired. NOTE: minutes (maximum) the compressor will be switched minimally
Indoor fan runs contin- on for 3 minutes.
uously in cooling mode. Temperature is set to a value which is too high (in Observe the temperature setting on the remote control. Also note
Cool mode), that each 15 minutes (maximum), the compressor will be
switched on minimally for 3 minutes.
Only Indoor Fan Motor Overload safety device on compressor is cut out Switch off power and try again after one hour.
and Outdoor Fan Motor due to high temperature.
are Working. No Cool-
ing and/or Heating Compressor run capacitor is burnt. Replace compressor run capacitor.
Takes Place. Compressor winding shorted. Replace compressor.
No Air Supply at Indoor Indoor fan motor is blocked or turns slowly. 1. Check vottage. Repair wiring if necessary.
Unit (Compressor Op- 2. Check indoor fan wheel if tight on motor shaft. Tighten if nec-
erates), 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- Unit must be charged (according to the nameplate) after Iocal-
tor coil. izing the gas leak.
Clogged air filters. Clean filters.
In Heat Mode, Only A/C operating in defrost cycle. Wait 10 minutes (maximum) until the unit resumes normal opera-
Compressor Runs. Out- tion.
door and Indoor Fan
Motors are Stopped.
Water Accumulates Drain pan pipe or hose is clogged or the spout of Disassemble plastic drain pipe from spout of evaporator drain
and Overflows from drain pan is clogged, pan. Flush with clean water.
Evaporator Drain Pan.
Unit Does Not Operate The unit is in the Auto, (emergency) mode. Push button once to cancel Auto, (emergency) mode.
in Desired 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 Oool 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- Common Infrared Code. Modify the Remote Control IR transmission code.
ference from Other Re- Refer to "Changing Unit ID Code" in the Owner's Manual.
mote Control or the Re-
mote Control Interferes
with Other Instruments.
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 (!4°F) the unit wil! not start and the filter led will flash five
(5) times to indicate that low temperature protection is activated.
International Comfort Products, LLC
Lewisbur_, Tennessee 37091
Manutacturer reserves the right to discontinue, or change at any t_me, speolhCatlOnS or designs without notice and without incurring ObllgBtlons,
19