Mars Comfort-Aire Century DVH Series Repair manual

www.marsdelivers.com
Owner’s Manual &
Installation Manual
DVH Series
Inverter Single Zone Ductless Mini-Split
DVH09SG-0
DVH09SG-1
DVH12SG-0
DVH12SG-1
DVH18SG-1
DVH24SG-1

Unit Specifications and Features ...........................................................07
Owner’s Manual
Table of Contents
Safety Precautions ...............................................................................03
Care and Maintenance......................................................................12
Troubleshooting.................................................................................14
1. Indoor unit display.........................................................................................................................07
2. Operating temperature..................................................................................................................09
3. Other features ..............................................................................................................................10
4. Setting angle of airflow.................................................................................................................11
5. Manual operation (without Remote)..............................................................................................11

Installation Manual
Accessories..........................................................................................17
Unit Parts.............................................................................................19
Indoor Unit Installation......................................................................20
1. Select installation location..............................................................................................................20
2. Attach mounting plate to wall........................................................................................................20
3. Drill wall hole for connective piping................................................................................................21
4. Prepare refrigerant piping...............................................................................................................22
5. Connect drain hose........................................................................................................................22
6. Connect signal cable......................................................................................................................23
7. Wrap piping and cables.................................................................................................................24
8. Mount indoor unit.........................................................................................................................25
Outdoor Unit Installation.........................................................................26
1. Select installation location..............................................................................................................26
2. Install drain joint............................................................................................................................27
3. Anchor outdoor unit......................................................................................................................27
4. Connect signal and power cables...................................................................................................29
Refrigerant Piping Connection.........................................................30
A. Note on Pipe Length....................................................................................................................30
B.
Connection Instructions –Refrigerant Piping.................................................................................30
1. Cut pipe.................................................................................................................................30
2. Remove burrs.........................................................................................................................31
3. Flare pipe ends.......................................................................................................................31
4. Connect pipes........................................................................................................................31
Air Evacuation...................................................................................33
1. Evacuation Instructions................................................................................................................33
2. Note on Adding Refrigerant.........................................................................................................34
Electrical and Gas Leak Checks........................................................35
Test Run.............................................................................................36
Installation Summary - Indoor Unit .................................................18

1900 Wellworth
Jackson, MI 49203
Attention
Attention: Smartphone Compatibility
The following indoor unit models are compatible with smartphone operation.
Please order accessory; 7800-208 and follow the enclosed instructions.
B-DVH09SG-0/1, B-DVH12SG-0/1, B-DVH18SG-1, B-DVH24SG-1
ALL INVERTER MINI-SPLITS REQUIRE 14-4 STRANDED
WIRE BETWEEN THE INDOOR AND OUTDOOR UNITS
(NO EXCEPTIONS)
14 AWG 4/C TRAY CABLE
A14/4SRBTHHNBK
14 AWG (19/0147) BC 4/C, THHN CONDUCTORS POWER & CONTROL
TRAY CABLE TYPE TC CABLE FOR INSTALLATION IN
ACCORDANCE WITH ARTICLE 336 AND OTHER APPLICABLE PARTS
OF THE NATIONAL ELECTRICAL CODE. 600V (UL) E123517 DIRECT
BURIAL SUNLIGHT RESISTANT PVC JACKET
10/25/16
MADE IN USA BLACK
RoHS Compliant
MARS Part:
7603-900: 30’
7603-901: 55’
7603-902: 250’

Safety Precautions
Safety
Read Safety Precautions Before Operation and Installation
The seriousness of potential damage or injuries is classified as either a WARNING or CAUTION.
Incorrect installation due to ignoring instructions can cause serious damage or injury.
WARNING
This appliance can be used by children aged from 8 years and above and persons with reduced
This appliance is not intended for use by persons(including children) with reduced physical, sensory
or mental capabilities, or lack of experience and knowledge, unless they have been given supervision
or instruction concerning use of the appliance by a person responsible for their safety. Children
should be supervised to ensure that they do not play with the appliance(IEC Standard requirements).
physical, sensory or mental capabilities or lack of experience and knowledge if they have been given
supervision or instruction concerning use of the appliance in a safe way and understand the hazards
involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be
made by children without supervision(EN Standard requirements).
WARNINGS FOR PRODUCT USE
•
If an abnormal situation arises (like a burning smell), immediately turn off the unit and disconnect
the power. Call your dealer for instructions to avoid electric shock, fire or injury.
•
Do not
insert fingers, rods or other objects into the air inlet or outlet. This may cause injury, since
the fan may be rotating at high speeds.
•
Do not
use flammable sprays such as hair spray, lacquer or paint near the unit. This may cause
fire or combustion.
•
Do not
operate the air conditioner in places near or around combustible gases. Emitted gas may
collect around the unit and cause explosion.
•
Do not
•
•
Do not
expose your body directly to cool air for a prolonged period of time.
•
•
If the air conditioner is used together with burners or other heating devices, thoroughly ventilate
the room to avoid oxygen deficiency.
Safety Precautions
Do not allow children to play with the air conditioner. Children must be supervised around the
unit at all times.
operate your air conditioner in a wet room such as a bathroom or laundry room. Too
much exposure to water can cause electrical components to short circuit.
In certain functional environments, such as kitchens, server rooms, etc., the use of specially
designed air-conditioning units is highly recommended.
 Page 3
WARNING
This symbol indicates the possibility
of personnel injury or loss of life.
CAUTION
This symbol indicates the possibility of
property damage or serious consequences.

Safety Precautions
 Page 4
• Do not
clean the air conditioner with combustible cleaning agents. Combustible cleaning agents
can cause fire or deformation.
CLEANING AND MAINTENANCE WARNINGS
• Turn off the device and disconnect the power before cleaning. Failure to do so can cause
electrical shock.
• Do not
clean the air conditioner with excessive amounts of water.
CAUTION
• Turn off the air conditioner and disconnect the power if you are not going to use it for a long time.
• Turn off and unplug the unit during storms.
• Make sure that water condensation can drain unhindered from the unit.
• Do not operate the air conditioner with wet hands. This may cause electric shock.
• Do not use device for any other purpose than its intended use.
• Do not climb onto or place objects on top of the outdoor unit.
• Do not allow the air conditioner to operate for long periods of time with doors or windows open,
or if the humidity is very high.
ELECTRICAL WARNINGS
• Only use the specified power cord. If the power cord is damaged, it must be replaced by the
manufacturer , its service agent or similarly qualified persons in order to avoid a hazard.
• Keep power plug clean. Remove any dust or grime that accumulates on or around the plug. Dirty
plugs can cause fire or electric shock.
•
•
•
•
•
•
•
Do not pull power cord to unplug unit. Hold the plug firmly and pull it from the outlet. Pulling
directly on the cord can damage it, which can lead to fire or electric shock.
Do not modify the length of the power supply cord or use an extension cord to power the unit.
Do not share the electrical outlet with other appliances. Improper or insufficient power supply
can cause fire or electrical shock.
If connecting power to fixed wiring, an all-pole disconnection device which has at least 3mm
clearances in all poles, and have a leakage current that may exceed 10mA, the residual current
device(RCD) having a rated residual operating current not exceeding 30mA, and disconnection
must be incorporated in the fixed wiring in accordance with the wiring rules.
For all electrical work, follow all local and national wiring standards, regulations, and the
Installation Manual. Connect cables tightly, and clamp them securely to prevent external forces
from damaging the terminal. Improper electrical connections can overheat and cause fire, and may
also cause shock.
All electrical connections must be made according to the Electrical Connection
Diagram located on the panels of the indoor and outdoor units.
All wiring must be properly arranged to ensure that the control board cover can close properly. If
the control board cover is not closed properly, it can lead to corrosion and cause the connection
points on the terminal to heat up, catch fire, or cause electrical shock.
The product must be properly grounded at the time of installation, or electrical shock may occur.
TAKE NOTE OF FUSE SPECIFICATIONS
The air conditioner’s circuit board (PCB) is designed with a fuse to provide overcurrent protection.
The specifications of the fuse are printed on the circuit board ,such as :
Indoor unit: T3.15AL/250VAC, T5AL/250VAC, T3.15A/250VAC, T5A/250VAC, etc.
Outdoor unit:T20A/250VAC(<=18000Btu/h units), T30A/250VAC(>18000Btu/h units)
NOTE: For the units with R32 or R290 refrigerant , only the blast-proof ceramic fuse can be used.

Safety Precautions
 Page 5
WARNINGS FOR PRODUCT INSTALLATION
1. Installation must be performed by an authorized dealer or specialist. Defective installation can
cause water leakage, electrical shock, or fire.
2. Installation must be performed according to the installation instructions. Improper installation
can cause water leakage, electrical shock, or fire.
(In North America,installation must be performed in accordance with the requirement of NEC
and CEC by authorized personnel only.)
3.
Contact an authorized service technician for repair or maintenance of this unit. This appliance
shall be installed in accordance with national wiring regulations.
4.
Only use the included accessories, parts, and specified parts for installation. Using non-standard
parts can cause water leakage, electrical shock, fire, and can cause the unit to fail.
5.
6.
Install the unit in a firm location that can support the unit’s weight. If the chosen location cannot
support the unit’s weight, or the installation is not done properly, the unit may drop and cause
serious injury and damage.
7.
8.
9.
10.
11.
Do not turn on the power until all work has been completed.
When moving or relocating the air conditioner, consult experienced service technicians for
disconnection and reinstallation of the unit.
How to install the appliance to its support, please read the information for details in "indoor unit
installation" and "outdoor unit installation" sections .
For units that have an auxiliary electric heater, do not install the unit within 1 meter (3 feet) of
any combustible materials.
Do not install the unit in a location that may be exposed to combustible gas leaks. If
combustible
gas accumulates around the unit, it may cause fire.
Install drainage piping according to the instructions in this manual. Improper drainage may
cause water damage to your home and property.
Note about Fluorinated Gasses(Not applicable to the unit using R290 Refrigerant)
1.
This air-conditioning unit contains fluorinated greenhouse gasses. For specific information on the
type of gas and the amount, please refer to the relevant label on the unit itself or
the
“Owner's Manual - Product Fiche ” in the packaging of the outdoor unit. (European
Union products only)
.
2. Installation, service, maintenance and repair of this unit must be performed by a certified
technician.
3. Product uninstallation and recycling must be performed by a certified technician.
4. For equipment that contains fluorinated greenhouse gases in quantities of 5 tonnes of CO 2
equivalent or more, but of less than 50 tonnes of CO
2 equivalent, If the system has a leak-
detection system installed, it must be checked for leaks at least every 24 months.
5. When the unit is checked for leaks, proper record-keeping of all checks is strongly recommended.

Safety Precautions
Page 6 
WARNING for Using R32/R290 Refrigerant
When flammable refrigerant are employed, appliance shall be stored in a well-ventilated area
where the room size corresponds to the room area as specific for operation.
For R32 refrigerant models:
Appliance shall be installed, operated and stored in a room with a floor area larger than 14 ft.
Appliance shall not be installed in an unventilated space, if that space is smaller than
14 ft. For
R290 refrigerant models, the minimum room size needed:
<=9000Btu/h units:
42 ft.
>9000Btu/h and <=12000Btu/h units: 55 ft.
>12000Btu/h and <=18000Btu/h units: 26m
>18000Btu/h and <=24000Btu/h units: 35m
Reusable mechanical connectors and flared joints are not allowed indoors.
(EN Standard Requirements).
Mechanical connectors used indoors shall have a rate of not more than 3g/year at 25%
of the maximum allowable pressure. When mechanical connectors are reused indoors,
sealing parts shall be renewed. When flared joints are reused indoors, the flare part
shall be re-fabricated. (UL Standard Requirements)
85 ft.
114 ft.

Page 7 
Unit Specifications and Features
Unit
Specifications
and Features
Indoor unit display
Display Code
Meanings
Power Cable (Some Units )
Remote Control
Remote Control
Holder (Some Units)
Functional Filter
(On Back of Main Filter - Some Units)
Louver
Front Panel
Display window
(A) (B) (C) (D)
“ ”
“ ”
when ECO function is activated(some units)
Lights up in different color according to the operation
mode(some units):
Under COOL and DRY mode, it displays as cool color.
Under HEAT mode, it displays as warm color.
“ ” when Wireless Control feature is activated(some units)
“ ” for 3 seconds when:
• TIMER ON is set (if the unit is OFF, remains on when TIMER ON is set )
• FRESH , SWING, TURBO , SILENCE or SOLAR PV ECO feature is turned on
“ ”
“ ” for 3 seconds when:
• TIMER OFF is set
• FRESH , SWING, TURBO , SILENCE or SOLAR PV ECO feature is turned off
“ ” when defrosting(cooling & heating units)
“ ” when anti-cold air feature is turned on
“ ” when unit is self-cleaning
“ ” when 8 C heating feature is turned on
“ ” Displays temperature, operation feature and Error codes:
NOTE: Different models have different front panel and display windows. Not all the indicators
described below are available for the air conditioner you purchased. Please check the indoor display
window of the unit you purchased.
Illustrations in this manual are for explanatory purposes. The actual shape of your indoor unit
may vary. The actual shape shall prevail.

Unit
Specifications
and Features
Page 8 
(E)
“ ”
Power Cable (Some Units )
Remote Control
Remote Control
Holder (Some Units)
Functional Filter
(On Back of Main Filter - Some Units)
Louver
Front Panel
Display window
Display window
The unit has a built-in light sensor to detect
the ambient brightness. When the light is
turned off, the display will be off after 7
seconds, saving energy and offering you a
comfortable sleep.
“ ” for 3 seconds when:
• TIMER ON is set(if the unit is OFF, remains on when TIMER ON is set )
• FRESH, SWING, TURBO, or SILENCE features is turned on
“ ” for 3 seconds when:
• TIMER OFF is set
• FRESH, SWING, TURBO, or SILENCE features is turned off
“ ” when defrosting(for cooling & heating units)
“ ” when unit is self-cleaning(some units)
“ ” when fresh feature is turned on(some units)
“ ” when ECO feature is activated(some units)
“ ” when wireless control feature is activated(some units)
Display Code
Meanings
“ ” Displays temperature, operation feature and Error codes:
In Fan mode, the unit will display the room temperature.
In other modes, the unit will display your temperature setting.
Pressing the LED button on the remote control will turn off the display screen, press the
LED button again during 15 seconds and it will display the room temperature, if you press
it again after 15 seconds, it will turn on the display screen.
“ ” when 8°C(46°F) or 12°C(54°F) heating mode is turned
on(some units)