40MVC / 38MVC
40MVQ / 38MVQ
High---Wall D uct Free Split System
Sizes 009 to 024
Installation Instructions
the environmentally sound refrigerant
NOTE: Read the entire instruction manual before starting the
installation.
TABLE OF CONTENTS
PAGE
PARTS LI ST 2.......................................
SAFETY CONSIDERATIONS 3.........................
GENERAL 3.........................................
SYSTEM REQUIREMENTS 3..........................
DIMENSIONS 4......................................
SERVICE VALVE LOCATIONS 4........................
CLEARANCES 5.....................................
INSTALLATION TIPS 6...............................
INDOOR UNIT INSTALLATION 6.......................
OUTDOOR UNIT INSTALLATION 7.....................
INSTALL ALL POWER AND INTERCONNECTING WIRING
TO OUTDOOR UNIT 8--9..............................
INSTALL ALL POWER, INTERCONNECTING WIRING,
AND PIPING TO INDOOR UNIT 10.....................
REMOTE CONTROL INSTALLATION 10.................
SYSTEM VACUUM AND CHARGE 11...................
START--UP 12........................................
TROUBLESHOOTING 13..............................
Part
No.
Name of Part Qty
1 Mounting Plate 1
2 Mounting Screw ST3.9x25--- C--- H 8
3 Anchor 8
4 Remote Control 1
5 Remote Control Holder 1
6 M o u n t i n g S crew B S T 2 . 0 x 1 0 --- C --- H 2
PARTS LIST
Part
No.
Name of Part Qty
1 Mounting Plate 1
2 M o u n t i n g S crew A S T 3 . 9 x 2 5 --- C --- H 8
3 Anchor 8
4 Remote Control 1
5 Remote Control Holder 1
6 M o u n t i n g S crew B S T 2 . 0 x 1 0 --- C --- H 2
38/40MVC, MVQ
Air
Air Inlet
filter
3
1
2
3
A
ir
filter
Mounting screw B
ST2.9X10-C-H
4
Remote control
6
5
Remote control holder
Air Inlet
2
6
3
4
Remote c
1
Remote Control
ontrol holder
5
Air outlet
Loop the
connecting
cable.
Fig. 1 --- 40MVC,MVQ/38MVC,MVQ009--012
Parts List
A07334a
Fig. 2 --- 40MVC, MVQ/38MVC,MVQ018--024
Loop the connecting
cable.
Parts List
Remove the water receiver first
before connecting the pipes.
Note:
--- If the outdoor unit is higher than the indoor unit, prevent rain from flowing into the indoor unit along the connection pipe by making a downward arc inthe
connection pipe before it enters the wall to the indoor unit. This will ensure that rain will drip from the connection pipe before it enters the wall.
--- The illustration above is only a sketch. Different models may be slightly different.
A07335a
2
SAFETY CONSIDERATIONS
Installing, starting up, and servicing air--conditioning equipment
can be hazardous due to system pressures, electrical components,
and equipment location (roofs, elevated structures, etc.).
Only trained, qualified installers and service mechanics should
install, start-- up, and service this equipment.
Untrained personnel can perform basic maintenance functions such
as cleaning coils. All other operations should be performed by
trained service personnel.
When working on the equipment, observe precautions in the
literature and on tags, stickers, and labels attached to the
equipment.
Follow all safety codes. Wear safety glasses and work gloves. Keep
quenching cloth and fire extinguisher nearby when brazing. Use
care in handling, rigging, and setting bulky equipment.
Read these instructions thoroughly and follow all warnings or
cautions included in literature and attached to the unit. Consult
local building codes and National Electrical Code (NEC) for
special requirements. Recognize safety information. This is the
!
!
safety--alert symbol
in instructions or manuals, be alert to the potential for personal
injury.Understand these signal words: DANGER, WARNING, and
CAUTION. These words are used with the safety--alert symbol.
DANGER identifies the most serious h azards which will result in
severe personal injury or death. WARNING signifies hazards
which could result in personal injury or death. CAUTION is used
to identify unsafe practices which may result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability, or
operation.
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF
position. There may be more than 1 disconnect switch.
Lock out and tag switch with a suitable warning label.
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Do not bury more than 36 in. (914 mm) of refrigerant pipe
in the ground. If any section of pipe is buried, there must be
a 6 in. (152 mm) vertical rise to the valve connections on
the outdoor units. If more than the recommended length is
buried, refrigerant may migrate to the cooler buried section
during extended periods of system shutdown. This causes
refrigerant slugging and could possibly damage the
compressor at start--up.
. When you see this symbol on the unit and
WARNING
CAUTION
GENERAL
These instructions cover the installation, start--up and servicing of
38MVC,MVQ outdoor and 40MVC, MVQ indoor units duct free
systems.
SYSTEM REQUIREMENTS
Allow sufficient space for airflow and servicing unit. See Fig. 3
and 4 for minimum required distances between unit and walls or
ceilings.
Piping
IMPORTANT: Both refrigerant lines must be insulated
separately.
S Minimum refrigerant line length between the indoor and outdoor
units is 10 ft. (3 m).
S The following maximum lengths are allowed:
REFRIGERANT LINE LENGTHS ft. (m)
Unit Size Max Line Length
9K 65 (20) 35 (11) 35 (11)
12K 65 (20) 35 (11) 35 (11)
18K 100 (30) 50 (15) 50 (15)
24K 100 (30) 60 (18) 60 (18)
S The following are the piping sizes.
Unit Size Mix Phase Vapo r
9K 1/4” 3/8”
12K 1/4” 1/2”
18K 1/4” 1/2”
24K 3/8” 5/8”
Refrigerant Charge
REFRIGERANT CHARGE lb. (kg)
Unit Size Air Conditioner
9K 2.3 (1.0) 2.4 (1.1)
12K 2.9 (1.3) 3.0 (1.4)
18K 4.4 (2.0) 4.5 (2.0)
24K 5.3 (2.4) 5.3 (2.4)
S Above charge is for piping runs up to 25 ft. (7.6 m).
S For piping runs greater than 25 ft. (7.6 m), add 0.1 oz. of
refrigerant per foot of extra piping up to the allowable
length.
S Capillary tubes in outdoor unit are used as metering devices.
Connecting (Power and Control
S The main power is supplied to the outdoor unit. The field
supplied connecting cable from the outdoor unit to indoor unit
consists of four wires and provides the power for the indoor unit
as well as the communication signal between the outdoor and
indoor unit.
For 9K and 12K units, all four wires are low voltage DC.
For 18K and 24K, two wires are high voltage AC power, one is
pulse DC and one is a ground wire.
S Consult local building codes, NEC (National Electrical Code) or
CEC (Canadian Electrical Code) for special requirements.
Model Size Power So urce
9k
12k 15/25
12k
18k 11/20
24k 14/25
S Connecting Cable: Voltage drop on the connecting cable
should be kept to a minimum. Do not use thermostat wire. Use
cable size and max length below:
18 AWG 50 Feet (16 m)
16 AWG 100 Feet (33 m)
Max Elevation
(ID over OD)
PIPE SIZES
Cable)
1 1 5 --- 1 --- 6 0
208/230---1 ---60
Max Elevation
(OD over ID)
Heat Pump
MIN CKT AMP
MAX FUSE/CB
AMP
12/20
9/15
38/40MVC, MVQ
3
DIMENSIONS -- INDOOR
Model Size
9K 32.09 (815) 11.02 (280) 7.68 (195)
12K 35.67 (906) 11.26 (286) 9.25 (235)
18K 49.21 (1250) 12.80 (325) 9.06 (230)
24K 49.21 (1250) 12.80 (325) 9.06 (230)
in. (mm)
DIMENSIONS -- OUTDOOR
A07336
W
H
in. (mm)
D
in. (mm)
Operating Weight lb (kg)
17.6 (8)
25.3 (11.5)
39.6 (18)
39.6 (18)
38/40MVC, MVQ
Model Size
Air Flow
W
in. (mm)
9K 30.71 (780) 21.26 (540) 21.61 (549) 11.81 (300) 10.87 (276)
12K 29.92 (760) 23.23 (590) 20.87 (530) 12.40 (315) 11.42 (290)
18K 33.07 (840) 27.36 (695) 22.05 (560) 14.17 (360) 13.19 (335)
24K 35.00 (889) 33.50 (851) 23.11 (588) 13.98 (355) 13.11 (333)
SERVICE VALVE LOCATIONS
9K
H
H
in. (mm)
L2
D
in. (mm)
12K
L1
W
L1
35
A07337
L2
in. (mm)
18K
L3
in. (mm)
24K
Operating Weight
lb (kg)
Cooling Only
70.4 (32) 72.6 (33)
79.2 (36) 83.6 (38)
116.6 (53) 117.7 (53.5)
149.6 (68) 151 (68.5)
Operating Weight
lb (kg)
Heat Pumps
Service Valve Locations
J 3.46 (88) 3.19 (81) 3.46 (88) 4.02 (102)
K 3.46 (88) 5.63 (143) 3.62 (92) 6.57 (167)
K
12K
in. (mm)
J
K
18K
in. (mm)
K
J
A07376a
24K
in. (mm)
J
J
K
9K
in. (mm)
4
CLEARANCES -- INDOOR
5
"
(0.13m)
min.
CEILING
6" (0.15m) min.
(1.8m)
6'
FLOOR
Fig. 3 --- Indoor unit clearance
5
"
(0.13m)
min.
A07891
CLEARANCES -- OUTDOOR
D
UNIT 9k and 12k in. (mm)
A 24 (610)
B 24 (610)
C 24 (610)
D 6 (152)
E 12 (305)
A
B
Fig. 4 --- Outdoor Unit Clearance
38/40MVC, MVQ
Air-inlet
E
C
Air-outlet
A07894
18k and 24k in. (mm)
24 (610)
36 (914)
24 (610)
6 (152)
12 (305)
5
INSTALLATION TIPS
A
Ideal installation locations include:
Indoor
Unit
S A location where there are no obstacles near inlet and outlet area.
S A location which can bear the weight of indoor unit.
S Do not install indoor units near a direct source of heat such as
direct sunlight or a heating appliance.
S A location which provides appropriate clearances as outlined in
Fig. 3 (pg. 5).
Outdoor
Unit
S A location which is convenient to installation and not exposed to
strong wind. If unit is exposed to strong winds it is
recommended that a wind baffle be used. Contact your Duct
Free Split representative for drawings.
S A location which can bear the weight of outdoor unit and where
the outdoor unit can be mounted in a level position.
S A location which provides appropriate clearances as outlined in
Fig. 4 (pg. 5).
S Do not install the indoor or outdoor units in a location with
special environmental conditions. For those applications, contact
your Duct Free Split representative.
INDOOR UNIT INSTALLATION
38/40MVC, MVQ
INSTALL MOUNTING PLATE
The mounting plate will look like one of the following depending
on model size:
Indoor unit outline
4.72" (120)
or more to wall
Left rear side
refrigerant
pipe hole o 65
NOTE: Measurements in ( ) are in mm.
3.19" (81)
1.77"(45)
11.10" (282"
Fig. 5 --- Mounting Plate-- Model size 009
6"(152) min. to ceiling
1.77"
(45)
6'(1.8 m) min. to floor
23.50"(597)
32.09" (815)
Mounting Plate
5.20"
(132)
3.54"
(90)
1.77"
(45)
4.72" (120) or more
to wall
Right rear side
refrigerant
pipe hole o 65
A07338
1. Carefully remove the mounting plate, which is attached to
the back of the indoor unit.
2. The mounting plate should be located horizontally and level
on the wall. All minimum spacings shown in Fig. 3, 4, and
5 -- 7 should be maintained.
3. If the wall is block, brick, concrete or similar material, drill
.2” (5 mm) diameter holes and insert anchors for the appropriate mounting screws.
4. Attach the mounting plate to the wall.
DRILL HOLE IN WALL FOR INTERCONNECTING
PIPING, DRAIN AND WIRING
Refrigerant Line Routing
The refrigerant lines may be routed in any of the four directions
showninFig.9.
For maximum serviceability, it is recommended to have refrigerant
line flare connections and the drain connections on the outside of
the wall that the fan coil can be mounted on.
If piping is going through the back:
1. Determine pipe hole position using the mounting plate as a
template. Drill pipe hole diameter per chart below. The
outside pipe hole is 1/2--in. (13 mm) min. lower than inside
pipe hole, so it slants slightly downward (see Fig. 8).
1/2 in. (13 mm)
Min.
INDOOR
Fig. 8 --- Drill Holes
Model Size
009, 012 2.75 (70)
018, 024 3.75 (95)
OUTDOOR
A07371
Hole Diameter
in. (mm)
6" (152) min.
to ceiling
35.63" (905)
6' (1.8 m) min.
to floor
32.01" (813)
3.86" (98)
Mounting Plate
3.54" (90)
2.05" (52)
4.72" (120)
or more to wall
1.99" (50)
Rear-left pipe
hole o 65mm
A07339
If piping is going through the right or left side:
1. Use a small saw blade to carefully remove the corresponding plastic covering on side panel and drill the appropriate
size hole where the pipe is going through the wall.
Pipe holder
Pipe cover
Pipe cover
4
Left piping
3
Left back piping
4.72" (120)
or more to wall
1.99" (50)
1.57" (40)
11.26" (286)
Rear-left pipe
hole o 65mm
2.17" (55)
Indoor unit outline
5.00" (127)
Fig. 6 --- Mounting Plate-- Model size 012
2
6" (152) min. from ceiling
7.01"
(178)
bove 4.72" (120)
from the wall
2.17" (55)
95
Pipe hole
2.28" (58)
6' (1.8 m) min. to floor
Fig. 7 --- Mounting Plate-- Model sizes 018 -- 024
49.21" (1250)
32.09" (815)
Hooked Part Hooked Part
10.12" (257)
95
Indoor unit outline
2.17" (55)
Pipe hole
Mounting Plate
Above 4.72" (120)
from the wall
12.80" (325)
2.17" (55)
A07340
Right piping
Fig. 9 --- Piping Locations
1
Right back piping
Size 012
Only
A07344
6
OUTDOOR UNIT INSTALLATION
1. Use a rigid base to support unit in a level position.
NOTE: For applications requiring cooling with outdoor
temperatures below 55_F(13_C), a low ambient control
field--installed accessory is available. Consult the Installation
Instruction for the low ambient kit for further information.
If the installation location may be exposed to strong wind , use a
wind baffle. Check with your Carrier representative to obtain
drawings for wind baffles.
Strong
wind
A07350
Fig. 10 --- High Wind Installation
2. Locate outdoor unit and connect piping and wiring.
MAKE REFRIGERANT PIPING CONNECTIONS
(OUTDOOR UNIT)
IMPORTANT: Use refrigeration grade tubing ONLY. No
other type of tubing may be used. Use of other types of tubing
will void manufacturer’s warranty.
Do not open service valves or remove protective caps from tubing
ends until all the connections are made.
Bend tubing with bending tools to avoid kinks and flat spots.
Keep the tubing free of dirt, sand, moisture, and other
contaminants to avoid damaging the refrigerant system.
Avoid sags in the suction line to prevent the formation of oil traps.
Insulate each tube with minimum 3/8-- in. (10 mm) wall thermal
pipe insulation. Inserting the tubing into the insulation before
making the connections will save time and improve installation
quality.
1. Remove service valve cover if provided with unit.
2. Cut tubing with tubing cutter. Remove service connection
if provided with unit.
3. Install correct size flare nut onto tubing and make flare connection.
4. Apply a small amount of refrigerant oil to the flare connection on the tubing.
5. Properly align tubing in with service valve.
6. Tighten flare nut and finish installation using two wrenches
as shown in Fig. 11.
38/40MVC, MVQ
A07354
Fig. 11 --- Tighten Flare Nut
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Excessive torque can break flare nut depending on
installation conditions.
CAUTION
7
INSTALL ALL POWER AND INTERCONNECTING WIRING TO OUTDOOR UNITS
G
1. Mount outdoor power disconnect.
2. Run power wiring from main box to disconnect per NEC
and local codes.
3. Remove field wiring cover from unit by loosening screws.
4. Remove caps on conduit panel.
5. Connect conduit to conduit panel. (See Fig.12 )
6. Properly connect both power supply and control lines to terminal block per the connection diagram for the appropriate
unit capacity and voltage. (See Fig. 13, pg. 9.)
7. Ground unit in accordance with NEC and local electrical
codes.
8. Use lock nuts to secure conduit.
9. Reinstall field wiring cover.
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
S Be sure to comply with local codes while running wire
from indoor unit to outdoor unit.
S Every wire must be connected firmly. Loose wiring may
cause terminal to overheat or result in unit malfunction.
A fire hazard may also exist. Therefore, be sure all wiring
is tightly connected.
S No wire should be allowed to touch refrigerant tubing,
compressor or any moving parts.
S Disconnecting means must be provided and shall be
located within sight and readily accessible from the air
conditioner.
S Connecting cable with conduit shall be routed through
hole in the conduit panel.
CAUTION
38/40MVC, MVQ
ELECTRICAL DATA
OPERATING
UNIT
SIZE
009
012 9.9 47 1.18 0.044 25 15 25
012
018 7.3 32.6 0.78 0.224 53
024 9.7 34.8 0.62 0.218 100 0.39 0.112 50 14 25
VOLTAGE
MAX/MIN V O L T S --- P H --- H Z RLA LRA FLA HP W VOLTS FLA HP W
127/104 1 1 5 --- 1 --- 6 0
253/187 208/230---1 ---60
Outdoor unit
Terminal Block
Over 1.57" (40mm)
Conduit panel
Conduit
Fig. 12 --- Field Wiring
COMPRESSOR OUTDOOR FAN INDOOR FAN
7.5 40
5.2 21 0.38 0.116 36 35 DC 1.18 0.044 25 9 15
0.69 0.102 23 35 DC
208/230---1 ---60
1.1 0.034 20 12 20
0.26 0.075 31 11 20
A07455
MCA
MAX
FUSE/CB
AMP
8
CONNECTION DIAGRAMS
CONNECTING CABLE
CONTROL
CONTROL
38/40MVC, MVQ
CONNECTING CABLE
CONNECTING CABLE
Notes:
1. Do not use thermostat wire for any connection between indoor and outdoor units.
2. All connections between indoor and outdoor units must be as shown. The connections are sensitive to polarity.
3. On the 18k and 24k units, the “S” terminal “CONTROL” output is pulse DC with a potential AC voltage shock hazard.
Fig. 13 --- Connection Diagrams
9
A07654
INSTALL ALL POWER, INTERCONNECTING
k
WIRING, AND PIPING TO INDOOR UNIT.
1. Run interconnecting piping and wiring from outdoor unit to
indoor unit.
2. Run interconnecting cable through hole in wall (outside to
inside).
3. Lift indoor unit into position and route piping and drain
through hole in wall (inside to outside). Fit interconnecting
wiring into back side of indoor unit.
4. Put upper claw at back of indoor unit on upper hook of
Mounting Plate, move indoor unit from side to side to see
that it is securely hooked.
5. Open front cover of indoor unit and remove field wiring terminal block cover.
6. Pull interconnecting wire up from back of indoor unit and
position in close to the terminal block on indoor unit.
7. Push lower part of indoor unit up on wall, then move indoor unit from side to side, up and down to check if it is
hooked securely. (See Fig. 14.)
Upper hook
Lower hoo
38/40MVC, MVQ
8. Connect wiring from outdoor unit per connection diagram
(see Fig. 13 and Fig. 15).
9. Replace field wiring cover and close front cover of indoor
unit.
10. Connect refrigerant piping and drain line outside of indoor
unit. Refer to Fig. 11 for proper installation of flare
connections. Complete pipe insulation at flare connection
then fasten piping and wiring to the wall as required. Completely seal the hole in the wall.
NOTE: For applications where gravity cannot be used for
drainage, a condensate pump accessory is available. Consult the
condensate pump Installation Instructions for more information.
REMOTE CONTROL INSTALLATION
Mounting Bracket (if installed on the wall)
1. Use the two screws supplied with control to attach Mounting Bracket to wall in location selected by customer and
within operating range.
2. Install batteries in Remote Control.
3. Place Remote Control into remote control Mounting Bracket.
4. For remote control operation, refer to the unit Owner’s
Manual.
Fig. 14 --- Indoor Unit Installation
Panel
18k & 24k
Terminal block
208/230-1-60
From outdoor unit
to indoor unit
Barrier between
high and low voltage
L1 L2 S G
Pulse DC between outdoor
unit and indoor unit with a
potential AC voltage shock hazard.
To outdoor unit
Fig. 15 --- Control and Power Wiring on Indoor Unit
Control Box Cover
Control:
A07347a
35v DC from
outdoor to indoor
9k & 12k
Terminal block of indoor unit
12 34
To Outdoor Unit
12v DC from outdoor unit
to indoor unit
A07349a
10
!
t
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Never use the system compressor as a vacuum pump.
Refrigerant tubes and indoor coil should be evacuated using the
recommended deep vacuum method of 500 microns. The alternate
triple evacuation method may be used if the procedure outlined
below is followed. Always break a vacuum with dry nitrogen.
SYSTEM VACUUM AND CHARGE
Using Vacuum Pump
1. Completely tighten flare nuts A, B, C, D, connect manifold
gage charge hose to a charge port of the low side service
valve. (See Fig. 16.)
2. Connect charge hose to vacuum pump.
3. Fully open the low side of manifold gage. (See Fig. 17)
4. Start vacuum pump
5. Evacuate using either deep vacuum or triple evacuation
method.
6. After evacuation is complete, fully close the low side of
manifold gage and stop operation of vacuum pump.
7. The factory charge contained in the outdoor unit is good for
up to 25 ft. (8 m) of line length. For refrigerant lines longer
than 25 ft (8 m), add 0.1 oz. per foot of extra piping up to
the maximum allowable length.
8. Disconnect charge hose from charge connection of the low
side service valve.
9. Fully open service valves B and A.
10. Securely tighten caps of service valves.
Outdoor Unit
Service Valve
Refrigerant
Low Side
A
High Side
B
Fig. 16 --- Service Valve
Manifold Gage
Indoor Uni
C
D
A07360
Deep Vacuum
Method
The deep vacuum method requires a vacuum pump capable of
pulling a vacuum of 500 microns and a vacuum gage capable of
accurately measuring this vacuum depth. The deep vacuum method
is the most positive way of assuring a system is free of air and
liquid water. (See Fig. 18)
5000
4500
4000
3500
3000
2500
2000
MICRONS
1500
1000
500
01234567
MINUTES
LEAK IN
SYSTEM
VACUUM TIGHT
TOO WET
TIGHT
DRY SYSTEM
A95424
Fig. 18 --- Deep Vacuum Graph
Triple Evacuation
Method
The triple evacuation method should only be used when vacuum
pump is only capable of pumping down to 28 in. of mercury
vacuum and system does not contain any liquid water.
Refer to Fig. 19 and proceed as follows:
1. Pump system down to 28 in. of mercury and allow pump to
continue operating for an additional 15 minutes.
2. Close service valves and shut off vacuum pump.
3. Connect a nitrogen cylinder and regulator to system and
open until system pressure is 2 psig.
4. Close service valve and allow system to stand for 1 hr. During this time, dry nitrogen will be able to diffuse throughout
the system absorbing moisture.
5. Repeat this procedure as indicated in Fig. 19. System will
then be free of any contaminants and water vapor.
EVACUATE
BREAK VACUUM WITH DRY NITROGEN
WAIT
EVACUATE
38/40MVC, MVQ
500 microns
Low side valve
Charge hose
Low side valve
High side valve
Charge hose
Fig. 17 --- Manifold
Vacuum pump
A07361
BREAK VACUUM WITH DRY NITROGEN
WAIT
EVACUATE
CHECK FOR TIGHT, DRY SYSTEM
(IF IT HOLDS DEEP VACUUM)
RELEASE CHARGE INTO SYSTEM
A95425
Fig. 19 --- Triple Evacuation Method
Final Tubing
Check
IMPORTANT: Check to be certain factory tubing on both indoor
and outdoor unit has not shifted during shipment. Ensure tubes are
not rubbing against each other or any sheet metal. Pay close
attention to feeder tubes, making sure wire ties on feeder tubes are
secure and tight.
11
START-- UP
Tes t Operation
Perform test operation after completing gas leak and electrical
safety check. (See Fig.. 20)
AUTO/COOL
Manual Button
A07363
Fig. 20 --- Test Operation
1. Push the “ON/OFF” button on Remote Control to begin
38/40MVC, MVQ
testing.
NOTE: A protection feature prevents air conditioner from being
activated for approximately 3 minutes.
2. Push MODE button, select COOLING, HEATING, FAN
mode to check if all functions work correctly.
3. When ambient temperature is lower than 63_F/17_C, the
unit cannot be controlled by Remote Control to run in cooling mode. For this condition, manual operation must be
used.
(1.) Open front panel of the indoor unit;
(2.) Push the manual switch once to energize the unit.
4. Be sure to set manual switch to “OFF” (by pushing it
twice) after finishing test operation.
NOTE: For Heat Pumps, follow the same procedure.
SYSTEM CHECKS
1. Conceal the tubing where possible.
2. Make sure that the drain tube slopes downward along its entire length.
3. Ensure all tubing and connections are properly insulated.
4. Fasten tubes to the outside wall, when possible.
5. Seal the hole through which the cables and tubing pass.
INDOOR UNIT
1. Do all Remote Control buttons function properly?
2. Do the display panel lights work properly?
3. Does the air deflection louver function properly?
4. Does the drain work?
OUTDOOR UNIT
1. Are there unusual noises or vibrations during operation?
Explain Following Items To Customer With The Aid Of The
Owner’s Manual:
1. How to turn air conditioner on and off; selecting
COOLING, HEATING and other operating modes; setting
a desired temperature; setting the timer to automatically start
and stop air conditioner operation; and all other features of
the Remote Control and display panel.
2. How to remove and clean the air filter.
3. How to set air deflection louver.
4. Explain care and maintenance.
5. Present the Owner’s Manual and installation instructions to
customer.
12
TROUBLESHOOTING
r
For ease of service, the systems are equipped with diagnostic code
display LEDs on both the indoor and outdoor units. The outdoor
diagnostic display is an LED on the outdoor unit board and is
limited to very few errors. However, it is useful in identifying
special error codes like a failure of the outdoor coil sensor on heat
LEDs on the display panel or the front of the unit. If possible,
always check the diagnostic codes displayed on the indoor unit
first.
The diagnostic codes for the indoor and outdoor units are listed in
the tables below.
pumps. The indoor diagnostic display is a combination of flashing
INDOOR UNIT DIAGNOSTIC GUIDES
9K & 12K Units
Operation
Lamp
l X Indoor fan speed has been out of control for over 1 minute
l On Indoor room temp. or evaporator sensor is open circuit or short circuited
X l Compressor over--- current protection has been activated four times
On l EEROM error
l l Indoor unit communication error (Illuminates simultaneously)
Operation
Lamp
l l l l Over--- current protection of the compressor occurs four times
X l X X Indoor room temp. sensor is open circuit or short circuited
l X X X Temp. sensor on indoor evaporator is open circuit or short circuited
X X l X
X X l l Outdoor unit protects (outdoor temp. sensor, phase order, etc.)
X l X l EEROM error
X X X l Indoor unit communication error
l =Flashing
X=Off
For additional diagnostic information, refer to the Service Manual.
Timer
Lamp
Timer
Lamp
Defrosting
Lamp
Auto
Lamp
Failure Mode
18K & 24K Units
Failure Mode
Temp. sensor on outdoor condenser is open circuit or short circuited (not cooling
only modes)
38/40MVC, MVQ
Infrared signal receptor
TIMER
OPERATION
AUTO
ECON
TIMER
PRE-DEF
A08486
HP Model size 009
* PRE--DEF light will illuminate when the unit is running in FAN ONLY mode on Cooling Only units.
Note: Cooling only units have same LED lights but without PRE--DEF print.
OPERATION
PRE-DEF
HP Model size 012
Infrared signal recepto
A07544
TIMER
AUTO
HP Model size 018--024
PRE.-DEF*
OPERATION
A08483
Fig. 21 --- LED Display Panel
OUTDOOR UNIT DIAGNOSTIC GUIDES
Flashing
Times after 2
Failure Mode
Second Off
5 Communication failure 4or6
2 Condenser temperature sensor failure 2
1 Other indoor failure –
If the unit is operating normally, the LED light on the outdoor board is lit continuously. If there is a failure, the LED light will flash a specific
number of times. Refer to the Outdoor Unit Diagnostic table above to determine failure.
Diagnostic
Chart
13
38/40MVC, MVQ
Copyright 2009 Carrier Corporation S 7310 W. Morris St. S Indianapolis, IN 46231
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Printed in U.S.A. Edi tion D a te: 02/09
14
Catalog No: 38--- 40MV--- 6SI
R e p l a c e s: 3 8 --- 4 0 M V --- 5 S I
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