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COMFORT-AIRE
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A-DVC24SF-1
Service Manual
56 pgs4.66 Mb0

COMFORT-AIRE A-DVC24SF-1, B-DVC12SF-0, B-DVC24SF-1, B-DVC18SF-1, B-DVC09SF-0 Service Manual

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Service Manual
DVC Series
Inverter Single Zone Ductless Mini-Split
A-DVC09SF-0 A-DVC12SF-0 A-DVC18SF-1 A-DVC24SF-1
B-DVC09SF-0 B-DVC12SF-0 B-DVC18SF-1 B-DVC24SF-1
www.marsdelivers.com
Service Manual - DVC 09/12/18/24 SF Series
CONTENTS
1. Precaution ..................................................................................................................................................... 3
1.1 Safety Precaution .......................................................................................................................... 3
1.2 Warning ......................................................................................................................................... 3
2. Model List ...................................................................................................................................................... 6
3. Dimensions ................................................................................................................................................... 7
3.1 Indoor Unit ..................................................................................................................................... 7
3.2 Outdoor Unit ................................................................................................................................ 10
4. Refrigerant Cycle Diagram ....................................................................................................................... 14
5. Installation Details ..................................................................................................................................... 15
5.1 Wrench torque sheet for installation ........................................................................................... 15
5.2 Connecting the cables ................................................................................................................ 15
5.3 Pipe length and the elevation ..................................................................................................... 16
5.4 Installation for the first time ......................................................................................................... 17
5.5 Adding refrigerant after the system has been in service ............................................................ 17
5.6 Re-installation after indoor unit repairs ....................................................................................... 18
5.7 Re-installation after outdoor unit repairs ..................................................................................... 18
6. Operation Characteristics .......................................................................................................................... 20
7. Electronic function ..................................................................................................................................... 21
7.1 Abbreviation ................................................................................................................................. 21
7.2 Display function ............................................................................................................................ 21
7.3 Main Protection ............................................................................................................................ 22
7.4 Operation Modes and Functions .................................................................................................. 22
8. Troubleshooting .......................................................................................................................................... 28
8.1 Indoor Unit Error Display .............................................................................................................. 29
8.2 Diagnosis and Solution ................................................................................................................ 31
Service Manual - DVC 09/12/18/24 SF Series
1. Precaution
1.1 Safety Precaution
To prevent injury to the user or other
people and property damage, the following
instructions must be followed.
Incorrect operation due to ignoring
instructions will cause harm or damage.
Before servicing the unit, be sure to
read this service manual.
1.2 Warning
Installation
Do not use a defective or underrated
circuit breaker. Use this appliance on a
dedicated circuit.
There is risk of fire or electric shock.
For electrical work, contact the dealer,
seller, a qualified electrician, or an
authorized service center.
Do not disassemble or repair the product,
there is risk of fire or electric shock.
Always ground the product.
There is risk of fire or electric shock.
Install the panel and the cover of
control box securely.
There is risk of fire of electric shock.
Always install a dedicated circuit and
breaker.
Improper wiring or installation may cause fore
or electric shock.
Use the correctly rated breaker or
fuse.
There is risk of fire or electric shock.
Do not modify or extend the power
cable.
There is risk of fire or electric shock.
Do not install, remove, or reinstall the
unit by yourself (customer).
There is risk of fire, electric shock, explosion,
or injury.
Be cautious when unpacking and
installing the product.
Sharp edges could cause injury, be especially
careful of the case edges and the fins on the
condenser and evaporator.
For installation, always contact the
dealer or an authorized service center.
Do not install the product on a
defective installation stand.
Be sure the installation area does not
deteriorate with age.
If the base collapses, the air conditioner could
fall with it, causing property damage, product
failure, and personal injury.
Do not let the air conditioner run for a
long time when the humidity is very high
and a door or a window is left open.
Take care to ensure that power cable
could not be pulled out or damaged during
operation.
There is risk of fire or electric shock.
Do not place anything on the power
cable.
There is risk of fire or electric shock.
Do not plug or unplug the power
supply plug during operation.
There is risk of fire or electric shock.
Do not touch the product with wet
hands when in operation.
Do not place a heater or other
appliance near the power cable.
There is risk of fire and electric shock.
Do not allow water to run into
electrical parts.
It may cause fire, failure of the product, or
electric shock.
Do not store or use flammable or
combustible gas near the product.
There is risk of fire or failure of product.
Do not use the product in a tightly
closed space for a long time.
Oxygen deficiency could occur.
When flammable gas leaks, turn off
the gas and open a window for
ventilation before turning the product on.
If strange sounds or smoke come
Service Manual - DVC 09/12/18/24 SF Series
from product, turn the breaker off or
disconnect the power supply cable.
There is risk of electric shock or fire.
Stop operation and close the window
in storm or hurricane. If possible, remove
the product from the window before the
hurricane arrives.
There is risk of property damage, failure of
product, or electric shock.
Do not open the inlet grill of the
product during operation. (Do not touch the
electrostatic filter, if the unit is so equipped.)
There is risk of physical injury, electric shock,
or product failure.
When the product is soaked, contact
an authorized service center.
There is risk of fire or electric shock.
Be cautious that water cannot enter
the product.
There is risk of fire, electric shock, or product
damage.
Ventilate the product from time to
time when operating it together with a stove
etc.
There is risk of fire or electric shock.
Turn the main power off when
cleaning or maintaining the product.
There is risk of electric shock.
When the product is not be used for a
long time, disconnect the power supply plug
or turn off the breaker.
There is risk of product damage or failure, or
unintended operation.
Take care to ensure that nobody
could step on or fall onto the outdoor unit.
This could result in personal injury and
product damage.
CAUTION
Always check for gas (refrigerant)
leakage after installation or repair of
product.
Low refrigerant levels may cause failure of
product.
Install the drain hose to ensure that
water is drained away properly.
A bad connection may cause water leakage.
Keep level even when installing the
product.
It can avoid vibration or water leakage.
Do not install the product where the
noise or hot air from the outdoor unit
could disturb the neighborhood.
It may cause a problem for your neighbors.
Use two or more people to lift and
transport the product.
Do not install the product where it will
be exposed to sea wind (salt spray) directly.
It may cause corrosion on the product.
Corrosion, particularly on the condenser and
evaporator fins, could cause product
malfunction or inefficient operation.
Operational
Do not expose the skin directly to
cool air for long periods. (Do not sit in
the draft).
Do not use the product for special
purposes, such as preserving foods, works
of art etc. It is a consumer air conditioner,
not a precision refrigerant system.
There is risk of damage or loss of property.
Do not block the inlet or outlet air
flow.
Use a soft cloth to clean. Do not use
harsh detergents, solvents, etc.
There is risk of fire, electric shock, or damage
to the plastic parts of the product.
Do not touch the metal parts of the
product when removing the air filter. They
are very sharp.
Do not step on or put anything on the
product. (outdoor units)
Always insert the filter securely.
Clean the filter every two weeks or more
often if necessary.
A dirty filter reduces the efficiency of the air
conditioner and could cause product
malfunction or damage.
Do not insert hands or other objects
Service Manual - DVC 09/12/18/24 SF Series
through air inlet or outlet while the product
is operated.
Do not drink the water drained from
the product.
Use a firm stool or ladder when
cleaning or maintaining the product.
Be careful and avoid personal injury.
Replace the all batteries in the remote
control with new ones of the same type. Do
not mix old and new batteries or different
types of batteries.
There is risk of fire or explosion.
Do not recharge or disassemble the
batteries. Do not dispose of batteries in a
fire.
They may burn or explode.
If the liquid from the batteries gets
onto your skin or clothes, wash it well
with clean water. Do not use the remote if
the batteries have leaked.
2. Model List
Model Names of Indoor/Outdoor Units
Capacity Indoor units Outdoor units
9K B-DVC09SF-0 A-DVC09SF-0
Inverter
12K
18K
24K
B-DVC12SF-0 A-DVC12SF-0
B-DVC18SF-1
B-DVC24SF-1
Service Manual - DVC 09/12/18/24 SF Series
A-DVC18SF-1
A-DVC24SF-1
Service Manual - DVC 09/12/18/24 SF Series
3. Dimensions
3.1 Indoor Unit
Model W D H
B-DVC09SF-0 722 (28.43") 187 (7.36")
B-DVC12SF-0
B-DVC18SF-1
B-DVC24SF-1
802 (31.57") 189 (7.44")
965 (37.99") 215 (8.46")
1080 (42.52")
226 (8.9")
290 (11.42")
297 (11.69")
319 (12.56")
335 (13.19")
For B-DVC09SF-0
For B-DVC12SF-0
Service Manual - DVC 09/12/18/24 SF Series
For B-DVC18SF-1
Service Manual - DVC 09/12/18/24 SF Series
For B-DVC24SF-1
3.2 Outdoor Unit
More than 30cm/11.81"
More than 60cm/23.62"
More than 200cm/78.74"
More than 30cm/11.81"
More than 60cm/23.62" (Service space)
Fence or
obstacles
Service Manual - DVC 09/12/18/24 SF Series
10
Service Manual - DVC 09/12/18/24 SF Series
487/19.17" W1
70/2.76" W2
298/11.73"
555/21.85"
300/11.81" D
H
12
60/2.36"
93/3.66"
H1
H2
D1
770/80.31" W
779/30.67" W3
322/12.68"
D2
25/.98" B1
90 B2
61.5/2.42" A2
12/.47" A1
R6
286/11.26"
D3
For A-DVC09SF-0, A-DVC12SF-0
11
For A-DVC18SF-1
800/31.5" W
514/20.24" W1
554/21.81"
60/2.36"
85.5/3.37"
340/13.39"
12.0/.47"
311/12.24"
815/32.09" W3
365/14.37"
333/13.11" D
70/2.76" W2
H
H1
H2
D1
D2
D3
62/2.44" B1
106/4.17" B2
20/.79" A1
R20
R6
61.6/2.43" A2
Service Manual - DVC 09/12/18/24 SF Series
12
Service Manual - DVC 09/12/18/24 SF Series
For A-DVC24SF-1
13
4. Refrigerant Cycle Diagram
Service Manual - DVC 09/12/18/24 SF Series
14
Service Manual - DVC 09/12/18/24 SF Series
>6 and ≤10
1
5. Installation Details
5.1 Wrench torque sheet for installation
Outside diameter Torque Additional tightening torque
mm inch N.cm N.cm
Ф6.35 1/4 1500(153kgf.cm) 1600(163kgf.cm)
Ф9.52 3/8 2500(255kgf.cm) 2600(265kgf.cm)
Ф12.7 1/2 3500(357kgf.cm) 3600(367kgf.cm)
Ф15.9 5/8 4500(459kgf.cm) 4700(479kgf.cm)
Ф19 3/4 6500(663kgf.cm) 6700(683kgf.cm)
5.2 Connecting the cables
The power cord of connect should be selected according to the following specifications sheet.
Rated current of appliance Nominal cross-sectional area (mm²)
>3 and ≤6 0.75
>10 and ≤16 1.5
>16 and ≤25 2.5
The cable size and the current of the fuse or switch are determined by the maximum current indicated
on the nameplate which located on the side panel of the unit. Please refer to the nameplate before
selecting the cable, fuse and switch.
15
5.3 Pipe length and the elevation
The pipe length and refrigerant amount:
Service Manual - DVC 09/12/18/24 SF Series
Model
DVC09SF-0
DVC12SF-0
DVC18SF-1
DVC24SF-1
Pipe size
Gas Liquid
3/8’’
(Ф9.52)
1/2’’
(Ф12.7)
1/2’’
(Ф12.7)
5/8"
(Ф15.9)
1/4’’
(Ф6.35)
1/4’’
(Ф6.35)
1/4’’
(Ф6.35)
3/8’’
(Ф9.52)
Standard
Length
(m)
7.5 10 25 15
25 ft 32 ft 82 ft .16 oz/ft
7.5 10 25 15
25 ft 32 ft 82 ft
7.5 10 25 15
25 ft 64 ft 98 ft
7.5 20 30 30
25 ft 64 ft 98 ft
Max.
Elevation
B (m)
Max.
Length
A (m)
Additional
Refrigerant
.16 oz/ft
.16 oz/ft
.323 oz/ft
(g/m)
Caution:
The capacity test is based on the standard length and the maximum permissive length is based on the system reliability.
16
Service Manual - DVC 09/12/18/24 SF Series
5.4 Installation for the first time
Air and moisture in the refrigerant system have
undesirable effects as below:
● Pressure in the system rises.
● Operating current rises.
● Cooling or heating efficiency drops.
● Moisture in the refrigerant circuit may
freeze and block capillary tubing.
● Water may lead to corrosion of parts in the
refrigerant system.
Therefore, the indoor units and the pipes
between indoor and outdoor units must be leak
tested and evacuated to remove gas and
moisture from the system.
Gas leak check (Soap water method):
Apply soapy water or a liquid neutral
detergent on the indoor unit connections
and outdoor unit connections by a soft
brush or spray to check for leakage of the
connecting points of the piping. If bubbles
appear, the pipes have leakage.
1. Air purging with vacuum pump
3) Connect the charge hose of high pressure handle connection to the vacuum pump.
4) Fully open the low pressure handle of the
manifold valve.
5) Operate the vacuum pump to evacuate.
6) Evacuate for 30 minutes and check whether
the compound meter indicates 300
microns. If the meter does not indicate
300 microns after pumping 30 minutes,
it should be pumped 20 minutes more. If the
pressure can’t achieve 300 microns
after pumping 50 minutes, please check if
there are some leakage points.
Fully close the low pressure handle of the
manifold valve and stop the operation of
the vacuum pump. Confirm that the gauge
needle does not move (approximately 5
minutes after turning off the vacuum pump).
7) Turn the flare nut of the 3-way valves about
45° counterclockwise for 6 or 7 seconds
after gas comes out, then tighten the flare
nut. Make sure the pressure display in
the pressure indicator is a little higher
than the atmosphere pressure. Then
remove the charge hose from the 3 way
valve.
8) Fully open the 2 way valve and 3 way valve
and securely tighten the cap of the 3 way
valve.
1) Completely tighten the flare nuts of the
indoor and outdoor units, confirm that both
the 2-way and 3-way valves are set to the
closed position.
2) Connect the charge hose with the push pin
of low pressure handle to the 3-way valves
gas service port.
5.5 Adding refrigerant after the system
has been in service
17
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