Dometic VMD2.5 User manual

CLIMATE CONTROL
MARINE SELF-CONTAINED
VMD2.5 Display
EN Marine Air Conditioner Display
Installation and Operating manual................................... 3

Copyright
© 2023 Dometic Group. The visual appearance of the contents of this manual is protected by copyright and design law. The
underlying technical design and the products contained herein may be protected by design, patent or be patent pending. The
trademarks mentioned in this manual belong to Dometic Sweden AB. All rights are reserved.

EN
English
1Important notes................................................................................................................................................. 3
2Explanation of symbols and safety instructions........................................................................................................3
3Intended use..................................................................................................................................................... 4
4General information............................................................................................................................................4
5Specifications.................................................................................................................................................... 5
6Pre-installation................................................................................................................................................... 5
7Installation.........................................................................................................................................................6
8Operation......................................................................................................................................................... 7
9Troubleshooting............................................................................................................................................... 16
10 Disposal..........................................................................................................................................................20
11 Warranty......................................................................................................................................................... 20
1 Important notes
Please read these instructions carefully and follow all instructions, guidelines, and warnings included in this product manual in order to ensure that you install, use, and maintain the product properly at all times. These instructions
MUST stay with this product.
By using the product, you hereby confirm that you have read all instructions, guidelines, and warnings carefully and that you understand and agree to abide by the terms and conditions as set forth herein. You agree to use this product
only for the intended purpose and application and in accordance with the instructions, guidelines, and warnings as set forth in this product manual as well as in accordance with all applicable laws and regulations. A failure to read and
follow the instructions and warnings set forth herein may result in an injury to yourself and others, damage to your product or damage to other property in the vicinity. This product manual, including the instructions, guidelines, and
warnings, and related documentation, may be subject to changes and updates. For up-to-date product information, please visit documents.dometic.com.
2 Explanation of symbols and safety instructions
This manual has safety information and instructions to help you eliminate or reduce the risk of accidents and injuries.
2.1 Recognize safety information
A signal word will identify safety messages and property damage messages, and also will indicate the degree or level of hazard
seriousness.
WARNING! This is a safety alert symbol.
It is used to alert you to potential physical injury hazards. Obey all safety messages that follow this symbol to avoid possi-
ble injury or death.
2.2 Understand signal words
A signal word will identify safety messages and property damage messages, and also will indicate the degree or level of hazard
seriousness.
WARNING!
Indicates a hazardous situation that, if not avoided, could result in death or serious injury.
NOTICE!
Used to address practices not related to physical injury.
Note Indicates additional information that is not related to physical injury.
2.3 Supplemental directives
To reduce the risk of accidents and injuries, please observe the following directives before proceeding to install and/or operate
this product:
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• Read and follow all safety information and instructions.
• Read and understand these instructions before installing or operating this product.
•• American Boat and Yacht Council (ABYC)
• ANSI/NFPA 70, National Electrical Code (NEC)
2.4 General safety messages
WARNING! ELECTRICAL SHOCK, FIRE and/or EXPLOSION HAZARD.
Failure to obey this warning could result in death or serious injury.
• Use only Dometic replacement parts and components that are specifically approved for us with the product.
• Avoid improper installation, adjustment, alterations, service, or maintenance of the product. Service and mainte-
nance must be done by a qualified service person only.
• Do not modify this product in any way. Modification can be extremely hazardous.
3 Intended use
The VMD2.5 Display (hereinafter referred to as display or product) is the control interface for operating compatible marine air
conditioning systems. This display is only suitable for the intended purpose and application in accordance with these instruc-
tions.
• Incorrect assembly or connection, including excess voltage
• Incorrect maintenance or use of spare parts other than original spare parts provided by the manufacturer
• Alterations to the product without express permission from the manufacturer
• Use for purposes other than those described in this manual
4 General information
This section describes the package contents, recommended tools for installation, compatible marine air conditioner models, and
available features.
Note The images used in this document are for reference purposes only. Components and component locations may
vary according to specific product models. Measurements may vary ± 0.4 in (10 mm).
4.1 Scope of delivery
This section describes the parts included with the display. Optional parts can be purchased seperately.
Included parts Quantity
VMD2.5 display 1
#6 x ¾ in. self-tapping screws 4
Installation and operation manual 1
Optional parts Quantity
Bezel 1
Display cable 50.0  (15.24 m)
Note A 25.0  (7.62 m) display cable is included with the marine air conditioner.
4.2 Tools
Dometic recommends that the following tools be used when installing the display.
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Screwdriver/bit Drill
Marker Sabre saw/multi-tool saw
4.3 Display dimensions
Width Height
Display with bezel 4.7 in (119 mm) 3.3 in (84 mm)
4.4 Compatibility
This display is compatible with TX-series marine air conditioners.
4.5 Available modes and features
This section lists the available modes, functions, and features. Refer to the Operation on page7 section for details.
Modes Features
• Cool
• Heat
• Auto
• Fan only
• Eco mode
• Quiet mode
• Scheduler can run up to four programs
• Selectable set point differential settings
• Selectable fan and pump operating speeds
• Adjustable low and high fan speeds
• Auxiliary electric heater connection/control
• Auto power source detection/management
• Zone assignment
• Filter hour counter/notification
• Display units in imperial or metric measurements
• Screen lock out
• Active alarm indicator
5 Specifications
This section lists the operating specifications for the display.
Ambient operating temperature range – 0.4 °F (– 18 °C)… 179.6 °F (82 °C)
Maximum Rh conditions 99% Non-condensing
Set point operating range 65 °F (18 °C) … 85 °F (29 °C)
Ambient temperature display range 5 °F (-15 °C) … 132 °F (56 °C)
Sensor accuracy ± 2°F at 77 °F (± 33.8 °F (1 °C) at 77 °F (25 °C))
Supply voltage type 12 VDC
6 Pre-installation
WARNING! ELECTRICAL SHOCK, FIRE, AND/OR EXPLOSION HAZARD.
Failure to obey the following warnings could result in death or serious injury:
• Prior to cutting or drilling, disconnect the power supply.
• Verify that there are no obstacles such as wires or pipes inside the cabin's walls at the display mounting location.
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NOTICE!
Do not locate the display panel in direct sunlight, near any heat-producing appliances, or in a bulkhead where tempera-
tures radiating from behind the panel may affect performance.
This section describes the actions to complete prior to installing the display.
6.1 Choosing the display location
• Inside wall of the cabin, out of direct sunlight
• Slightly higher than mid-height of the cabin wall
• An area with freely circulating air
• A maximum distance of 75.0  (22.86 m) from the air conditioner
6.2 Preparing the mounting location
1. Disconnect the power supply.

1
2
3
4
1 1.9 in (49 mm) 3 2.2 in (55 mm)
2 3.5 in (88 mm) 4 2.9 in (74 mm)
2. Mark the dimensions of the opening and the screw hole locations on the cabin wall.
3. Cut out the opening.
4. Drill four screw holes.
7 Installation
NOTICE!
Do not use a screw gun and do not overtighten the screws when mounting the display.
NOTICE!
Do not staple sensor cables during installation.
This section describes how to install the display.
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1. Route one end of the display cable through the electrical control box of the air conditioner and plug it into the jack on the cir-
cuit board.

1
2
1 Display cable 2 Jack
2. Route the other end of the display cable through the wall opening and plug it into the jack on the back of the display.
3. Use the screws to secure the display to the cabin wall.
4. Snap the bezel (optional) onto the display.
8 Operation
WARNING! ELECTRICAL SHOCK.
Failure to obey this warning could result in death or serious injury.
The display remains powered when the power control is off. Disconnect the power supply prior to performing any main-
tenance on the display.
This system utilizes variable speed technology, which allows the compressor to operate for long periods instead of constantly cy-
cling on and off. The benefits include increased reliability, reduced energy consumption, improved de-humidification, and lower
operating noise levels.
8.1 Home screen
This section shows the location of the controls and status indicators on the Home screen and describes their use.

70 F
RH 60%
Inside
2021.06.18
09:00AM
Cool
Auto
2
1
3
6
9
10
7
8
4
5
13
14
12 11
1 Fan speed indicator 8 Temperature/set point indicator
2 Mode indicator 9 Temperature down control
3 Scheduler indicator 10 Relative humidity indicator
4 Quiet mode indicator 11 Power control
5 Alarm indicator/control 12 Main menu control
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6 Eco mode indicator 13 Mode control
7 Temperature up control 14 Fan speed control
Table 1: Home screen controls and status indicators
Icon Control/indicator Description
-- Mode indicator The mode icon shows the current operating mode. The icon is animated when
the compressor is running and static when it is not running. The icon flashes
when the compressor cycles off and enters a three-minute delay mode before it
can cycle back on.
C ool
Mode: Cool The system will run a cooling cycle when the cabin temperature rises above the
cooling set point by the set point differential. The default set point differential is
2 °F (1.1 °C). Refer to Parameters on page11 to learn how to adjust the set
point differential.
H e at
Mode: Heat The system will run a heating cycle when the cabin temperature falls below the
heating set point by the set point differential. The system will cycle off when
the temperature set point is exceeded by 1 °F (0.6 °C). Refer to Parameters on
page11 to learn how to adjust the set point differential.
-- Mode: Auto The system will automatically switch between a cooling and a reverse (heating)
cycle depending on whether the cabin temperature goes above or below the
set point by 4 °F (2.1 °C).
-- Mode: Fan only The system will run the fan to circulate the air continuously turning on the com-
pressor.
A uto
Fan speed indicator The indicator shows the selected fan speed. In modes other than Fan Only, the
indicator shows Auto, indicating that the fan speed is following the compressor
speed. This is the ideal setting for true variable capacity performance. The icon
is animated when the fan is running and static it is not running. Refer to Parame
ters on page11 to learn how to adjust the low and high fan speeds.
Scheduler indicator The indicator appears when a scheduled program is active. Refer to Scheduler
mode on page11 to learn how to turn Schedular mode on/off and set up
and run programs.
Alarm indicator/control This indicator appears when there is an active alarm. Clearing the alarm no-
tification does not resolve the alarm. The alarm notification will reappear on
the Home screen until the problem is resolved. Refer to Troubleshooting on
page16 for information on resolving alarms.
• Tap the Alarm indicator to display the current alarm.
• If there are more than two alarms, tap the Up Arrow and Down Arrow to
navigate through the Alarm list.
• Tap an alarm from the list to view the details.
• Tap CLR to clear an individual alarm from the Alarm Details screen.
Quiet mode indicator The indicator appears when the function is active. Refer to Quiet mode on
page10 to learn how to turn Quiet mode on/off and adjust the set point.
Eco mode indicator The indicator appears when the function is active. Refer to Eco mode on
page10 to learn how to turn the mode on/off and adjust the set point.
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Icon Control/indicator Description
Up arrow Tap to raise the temperature on the Home screen. On other screens, tap to nav-
igate to the previous menu and/or raise a numerical value.
70 F
Temperature/set point
indicator
The indicator displays the new temperature set point while the temperature set
point is adjusted with the Up Arrow or Down Arow, then displays the tempera-
ture in the cabin.
Down arrow Tap to lower the temperature on the Home screen. On other screens, tap to
navigate to the next menu and/or lower a numerical value.
RH 60%
Relative humidity indica-
tor
The indicator displays the relative humidity in the cabin if a humidity sensor is
installed.
Power control The power button turns the system on or off. When on, the system will run in
the selected mode when the cabin temperature is higher (Cool mode) or low-
er (Heat mode) than the set point. When off, the system will not run although it
will stay in communication with the network (if present).
Tap and hold to toggle the power on or off.
Main menu control The Main menu is used to set up, schedule, and troubleshoot the system.
Tap to display the first Main menu screen, then tap the Down Arrow to display
the second Main Menu screen.
Mode control Tap to cycle through Cool, Heat, Auto, and Fan Only.
Fan speed control This control is only available when the system is in Fan Only mode. Refer to Para
meters on page11 to learn how to adjust the fan speed settings.
Tap to cycle through the fan speeds: Low, Medium, and High
Table 2: Additional controls
Icon Control/indicator Description
Cancel Tap to cancel an entry or to return to the previous screen.
CLR
Clear Tap to clear the current entry.
E dit
Edit Tap to make changes in the current screen.
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Icon Control/indicator Description
OK
OK Tap to confirm an entry.
Return home Tap to return to the Home screen.
Save Tap to save an entry.
8.2 Eco mode
Note Eco mode and Quiet mode can be active at the same time. The system will operate at the set point that is the low-
est. Be advised that setting the set point too low can affect the system's cooling capability.
8.2.1 Turning Eco mode on or off
1. On the Home screen, tap Main Menu.
2. Tap Function.
3. Tap Eco Mode to toggle the function on or off.
The Eco Mode indicator will display on the Home screen if the mode on.
8.2.2 Adjusting the Eco mode set point
1. On the Home screen, tap Main Menu.
2. Tap Function.
3. Tap Eco Mode.
4. Tap the Down Arrow.
5. Tap Eco Mode Set Point.
6. Tap the Le Arrow or Right Arrow to adjust the set point.
7. Tap Save.
The Eco Mode indicator will display on the Home screen if the mode on.
8.3 Quiet mode
Note Eco mode and Quiet mode can be active at the same time. The system will operate at the set point that is the low-
est. Be advised that setting the set point too low can affect the system's cooling capability. Quiet Mode will automatical-
ly turn off if the temperature is more than 3 °F (1.8 °C) from the set point.
8.3.1 Turning Quiet mode on or off
1. On the Home screen, tap Main Menu.
2. Tap Function.
3. Tap Quiet Mode to toggle the function on or off.
The Quiet Mode indicator will display on the Home screen if the mode on.
8.3.2 Adjusting the Quiet mode set point
To find the best set point, slowly decrease the set point percentage until the desired noise level is reached.
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1. On the Home screen, tap Main Menu.
2. Tap Function.
3. Tap Quiet Mode.
4. Tap the Down Arrow.
5. Tap Quiet Mode Set Point.
6. Tap the Le Arrow or Right Arrow to adjust the set point.
7. Tap Save.
The Quiet Mode indicator will display on the Home screen if the mode on.
8.4 Scheduler mode
Scheduler mode can automatically run up-to-four programs once they have been set up and activated. Programs can be set for
desired days and times and include modes, functions, and temperatures.
8.4.1 Turning Scheduler mode on or off
Scheduler mode must be turned on to run or edit programs.
1. On the Home screen, tap Main Menu.
2. Tap Scheduler Mode.
3. Tap Scheduler Mode to toggle the function on or off.
8.4.2 Enabling or disabling a program
Scheduler mode must be turned on to run programs. Programs and their scheduled actions will be shown on the Program
screen.
1. On the Home screen, tap Main Menu.
2. Tap Scheduler Mode.
3. Tap Programs.
4. Use the Up Arrow or Down Arrow to navigate to the program.
5. Tap the program menu bar to enable or disable the program.
8.4.3 Editing a program
Program options include setting the mode, functions, temperature set point, and the time and days of the week the program will
run once turned on.
1. On the Home screen, tap Main Menu.
2. Tap Scheduler Mode.
3. Tap Programs.
4. Use the Up Arrow or Down Arrow to navigate to the desired Program screen.
5. Tap Edit.
6. Tap Cool, Heat, Auto, or Off to select the mode, then tap the Down Arrow to move to the next screen.
7. Tap Eco and/or Quiet to turn these functions on or off, then tap the Down Arrow.
These functions will not be available if the mode selected in the previous step was "Off." Both can be set to on or off, as de-
sired.
8. Tap the Le Arrow or Right Arrow to set the temperature, then tap the Down Arrow.
9. Tap the Le Arrow or Right Arrow to set the time, then tap the Down Arrow.
10. Tap one or more days to set which days the program will run.
11. Tap the Save icon to save the program.
8.5 Parameters
1. From the Home screen, tap Main Menu.
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2. Tap Parameters, then use the Up Arrow and Down Arrow to scroll through the selections.
Selection Description Actions
Memorize Setting This selection memorizes the current settings for all parameters
providing a system-wide point that can be returned to when
troubleshooting.
1. Tap Memorize Settings.
2. Tap Yes.
3. Tap OK.
Recall Memorized This selection returns all parameters to the last memorized set-
tings.
1. Tap Recall Memorize.
2. Tap Yes.
3. Tap OK.
Recall Factory This selection returns all parameters to their factory settings. 1. Tap Recall Factory.
2. Tap Yes.
3. Tap OK.
High Fan Speed This selection adjusts the fan speed on the high setting reduc-
ing the air noise produced by the system.
1. Tap High Fan Speed.
2. Tap the Le Arrow or Right Arrow to ad-
just the maximum fan speed percentage.
3. Tap Save.
Low Fan Speed This selection adjusts the fan speed on the low setting ensuring
the fan speed is high enough to overcome the static pressure
in ductwork.
1. Tap Low Fan Speed.
2. Tap the Le Arrow or Right Arrow to ad-
just the minimum fan speed percentage.
3. Tap Save.
Fan Operate Mode Selecting Continuous keeps the fan running at slow speed
when the compressor cycles off. Selecting Cycled turns the fan
off and on with the compressor.
1. Tap Fan Operate Mode.
2. Tap Continuous or Cycled.
Pump Operate Mode Selecting Continuous keeps the pump running continuously
when the compressor cycles off. Selecting Cycled turns the
pump off and on with the compressor.
1. Tap Pump Operate Mode.
2. Tap Continuous or Cycled.
Inside Temp Calibrate This selection is used to calibrate the cabin temperature read-
ing when it is consistently different from the actual tempera-
ture.
1. Tap Inside Temp Calibrate.
2. Tap the Le Arrow or Right Arrow to ad-
just the reading.
3. Tap Save.
Temperature Units This selection toggles temperature readouts between °F and
°C and affects all temperature screens. The default is °F.
Tap Temperature Units to toggle between °F
or °C.
Pressure Units This selection toggles pressure readouts between psi, Kpa, or
bar and affects all pressure screens. The default is psi.
1. Tap Pressure Units.
2. Tap the Le Arrow or Right Arrow to ad-
just the reading.
3. Tap Save.
Aux Electric Heat This selection activates the auxiliary electric heater relay if one
is connected. It will only work in place of the reverse heating
cycle and not as a supplementary heat source. The default is
off. The appropriate power rating must be selected to activate
the heater.
1. Tap Aux Electric Heat.
2. Tap the Le Arrow or Right Arrow to
scroll through the options.
3. Tap Save and follow the prompts to con-
firm the selection.
Filter Hours Setting When activated, this selection indicates when the filter is ready
to be replaced as determined by the selected filter life range.
The default is off.
1. Tap Filter Hours Setting.
2. Tap the Le Arrow or Right Arrow to
scroll through the options.
3. Tap Save.
Filter Hours Reset This selection resets the filter life counter to zero. The filter
hours should be reset when the filter is replaced or cleaned.
This selection is not available when Filter Hours Setting is set to
off.
1. Tap Filter Hours Reset.
2. Tap Yes.
3. Tap OK.
Filter Alarm Delay This selection sets the duration to snooze the filter alarm when
Snooze is used in the Filter Alarm screen.
1. Tap Filter Alarm Delay.
2. Tap the Le Arrow or Right Arrow to ad-
just the reading.
3. Tap Save.
Zone/Area This selection assigns a zone name to one or more units. For
networked units, this allows a command from one display to
control all units assigned to that zone. The default for all units is
Master Stateroom.
1. Tap Zone/Area.
2. Tap the Le Arrow or Right Arrow to
scroll through the list of zones/areas.
3. Tap Save.
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Selection Description Actions
Set Point Temp Differential This selection adjusts the temperature differential between the
set point and the cabin temperature reading which is used to
determine when the system cycles on.
1. Tap Set Point Temp Differential.
2. Tap the Le Arrow or Right Arrow to
scroll through the list of settings.
3. Tap Save.
Discharge Pressure Calibra-
tion
This selection is used to calibrate the discharge pressure read-
ing when it is consistently different from the actual pressure.
The discharge pressure reading is used to monitor the health
of the system. If the value exceeds the factory set limit, an alarm
will display indicating the date and time of the occurrence.
1. Tap Discharge Pressure Calibration.
2. Tap the Le Arrow or Right Arrow to ad-
just the reading.
3. Tap Save.
Suction Pressure Calibration This selection is used to calibrate the suction pressure reading
when it is consistently different from the actual pressure.
1. Tap Suction Pressure Calibration.
2. Tap the Le Arrow or Right Arrow to ad-
just the reading.
3. Tap Save.
Suction Temp Calibrate This selection is used to calibrate the suction temperature read-
ing when it is consistently different from the actual tempera-
ture.
1. Tap Suction Temperature Calibration.
2. Tap the Le Arrow or Right Arrow to ad-
just the reading.
3. Tap Save.
Compressor Staging Delay This selection adjusts the amount of time it takes for the com-
pressor to start after a hard power cycle. Use for installations
where more than one system operates from the same power
source. Different staging delays allow compressors to start at
different times when the power is interrupted. Stage the units
at least five seconds apart.
1. Tap Compressor Staging Delay.
2. Tap the Le Arrow or Right Arrow to
scroll through the options.
3. Tap Save.
Low Voltage Monitor When activated, this selection detects and indicates when the
supply voltage is below the selected set point.
1. Tap Low Voltage Monitor.
2. Tap the Le Arrow or Right Arrow to
scroll through the options.
3. Tap Save.
Power Source Priority This selection manages which power source type is used when
both AC and DC power are available to the system. The default
is AC.
Tap Power Source Priority to toggle between
AC and DC.
8.6 System settings
1. From the Home screen, tap Main Menu.
2. Tap System, then use the Up Arrow and Down Arrow to scroll through the selections.
Selection Description Action
Display Brightness This selection adjusts the brightness of the display. 1. Tap Display Brightness.
2. Tap the Le Arrow or Right Arrow to adjust the
percentage.
Sleep Mode Delay This selection determines how long the display must re-
main inactive before the screen saver appears. Select-
ing off deactivates the screen saver.
1. Tap Sleep Mode Settings.
2. Tap the Le Arrow or Right Arrow to scroll
through the options.
3. Tap Save.
Language This selection determines the language used by the dis-
play.
1. Tap Language.
2. Tap the Le Arrow or Right Arrow to scroll
through the options.
3. Tap Save.
Screen Saver This selection determines which screen save appears on
the Home screen after a period of inactivity: the Domet-
ic logo (default), a simplified temperature screen, and a
blank black screen. Touching the screen wakes up the
display.
1. Tap Screen Saver.
2. Tap the Le Arrow or Right Arrow to scroll
through the options.
3. Tap Save.
Versions This selection displays the installed versions of firmware. Tap Versions.
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8.7 Troubleshoot
1. From the Home screen, tap Main Menu.
2. Tap Troubleshoot, then use the Up Arrow and Down Arrow to scroll through the selections.
Selection Description Action
Fault History This selection provides the history of any faults that have
occurred in the system since the last time the fault histo-
ry was reset. The fault history can only be reset by a ser-
vice technician.
1. Tap Fault History.
2. Tap the Up Arrow or Down Arrow to scroll
through the faults.
System Status This selection provides information on the present sys-
tem status.
1. Tap System Status.
2. Tap the Up Arrow or Down Arrow to scroll
through the status information.
8.8 Lock setting
The Lock Setting menu allows you to restrict access to the System, Parameter, and Scheduler menus with a 4-digit PIN code.
8.8.1 Setting the lock PIN
1. From the Home screen, tap Main Menu.
2. Tap Lock Setting.
3. Tap Yes to confirm you want to proceed.
4. Tap the number pad to enter a 4-digit PIN.
5. Tap OK to save the PIN and lock the menus.
8.8.2 Changing the lock PIN
1. From the Home screen, tap Main Menu.
2. Tap Lock Setting.
3. Tap Yes to confirm you want to proceed.
4. Tap Change PIN.
5. Tap the number pad to enter a 4-digit PIN.
6. Tap OK to save the new PIN.
8.8.3 Remove the lock PIN
1. From the Home screen, tap Main Menu.
2. Tap Lock Setting.
3. Tap Yes confirm you want to proceed.
4. Tap Remove PIN.
5. Tap OK to remove the PIN and unlock the menus.
8.9 Date & time
The Date & Time menu allows you set the date and time in your preferred format and choose whether to display them on the
Home screen.
8.9.1 Turning date & time on or off
This setting turns on or off the option to display the date and time on the Home screen.
1. From the Home screen, tap Main Menu.
2. Tap Date & Time.
3. Tap Date & Time Display to toggle the option on or off.
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8.9.2 Setting the date format
This setting gives the option to display the date in different formats. The default is MM-DD-YYYY.
1. From the Home screen, tap Main Menu.
2. Tap Date & Time.
3. Tap Date Format.
4. Tap the Le Arrow or Right Arrow to scroll through the formats.
5. Tap Save.
8.9.3 Setting the time format
This setting gives the option to display the time in 12- or 24-hour formats. The default is 12-hour.
1. From the Home screen, tap Main Menu.
2. Tap Date & Time.
3. Tap Time Format to toggle between the options.
8.9.4 Setting the date & time
This setting allows you to set the date and time.
1. From the Home screen, tap Main Menu.
2. Tap Date & Time.
3. Tap Date Time Settings.
4. Follow the screen prompts to make the changes.
5. Tap Save.
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9 Troubleshooting
Problem Possible cause Suggested remedy
The circuit breaker for the air conditioner is
off. Turn on the circuit breaker at the vessel's
panel.
The power button is off on the display. Turn on the power button on the display.
The voltage on the power supply line is not
high enough. 1. Verify the voltage on the power supply
line.
2. Check the wiring and terminals for
proper sizes and connections. Refer to
the installation manual that came with
the air conditioner.
3. Use a voltmeter to verify that the power
is the same at the air conditioner and at
the power source.
The system does not power up.
An electrical component has failed. Contact a qualified service technician.
The system encountered a hard fault. 1. Check the fault history. Refer to Trou
bleshoot on page14.
2. Follow the corresponding trou-
bleshooting steps in this section.
The power source has lost power. Verify that the power source is supplying
power.
The system shuts down.
An electrical component has failed. Contact a qualified service technician.
There is a power-related issue with the dis-
play, such as a power interruption, voltage
frequency fluctuation, electromagnetic in-
terference from other equipment, or a simi-
lar issue.
1. Turn off or move any high-power elec-
tronics near the display.
2. Switch the existing display cable for a
shielded cable.
3. If the problem persists, contact a quali-
fied service technician.
The system does not respond to changes
entered on the display.
The display and the air conditioner unit are
not compatible. Verify that the display being used is compat-
ible with the air conditioner.
The display does not show the correct room
temperature.
The return air sensor is in a position that
does not accurately reflect the cabin tem-
perature.
1. Reposition the return air sensor to a bet-
ter location, if possible.
2. On the Parameters menu, use the In-
side Temp Calibrate feature to calibrate
the air sensor.
The temperature of the seawater is too
high. Seawater temperature directly affects the
unit's efficiency. For optimal cooling, the
water temperature must be less than 95 °F
(35 °C).
The water flow is inadequate. Verify that there are no obstructions in the
water flow.
The system has lost refrigerant. Contact a qualified service technician.
The system is not blowing cold air.
The mode on the display is not set to Cool. Change the mode to Cool.
The temperature of the seawater is too low. Seawater temperature directly affects the
unit's efficiency. For the unit to heat (if the
reverse-cycle option is available), the water
temperature must be 40 °F (4 °C) or higher.
The system is not blowing hot air.
The reversing valve is stuck. 1. Lightly press on the valve with a rub-
ber mallet while the system is in Heat
mode.
2. If the problem persists, contact a quali-
fied service technician.
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Problem Possible cause Suggested remedy
The auxiliary electric heater is enabled but
not connected. 1. On the Parameters menu, set Aux Elec
Heat to Off.
2. Verify that the breaker for the auxiliary
heater is in the on position.
The mode is not set to Heat on the display. Change the mode to Heat.
The system has lost refrigerant. Contact a qualified service technician.
The airflow is blocked or restricted. 1. Remove any obstructions in the return
air stream.
2. Clean the return air filter and grille.
3. Check for crushed or restricted duct-
ing.
The ducting must be as straight,
smooth, and firmly supported as possi-
ble.
There is not enough airflow in the system.
The system is running in limit mode to com-
pensate for abnormal operating conditions
caused by environmental factors such as
seawater temperature, load, etc.
On the Troubleshoot menu, check System
Status for the operating mode. If the system
cannot resume normal operation within an
hour, a Limit Mode alarm will be sent to the
display until normal operation can be re-
sumed.
The variable speed compressor technology
slows down, but does not stop unless the
temperature set point is exceeded by 1 °F
(0.6 °C).
Adjust the temperature set point or use the
power button on the display to manually
turn off the system.
The compressor is not stopping.
An electrical component has failed. Contact a qualified service technician.
The Fan Operate mode is set for either Cy-
cled or Continuous. On the Parameters menu, change the Fan
Operate Mode to the desired setting.
The fan is not blowing or does not stop
blowing.
An electrical component has failed. Contact a qualified service technician.
The compressor cycled off because the
mode was changed. The compressor will cycle back on three
minutes after the mode change.
The mode icon is flashing.
The compressor cycled off because the tar-
get temperature was exceeded by 1 °F (0.6
°C) or more.
The compressor will cycle on once the cab-
in temperature no longer exceeds the set
point.
The filter warning displays. (is this text or
icon, if text, what text?)
The timer setting to clean or replace the air
filter has been reached. 1. Clean or replace the air filter.
2. On the Parameter menu, use the Filter
Hours Reset function to reset the timer.
(How?)
Fault: Return Air Sensor Failure (how are
faults communicated?)
An electrical connection or component has
failed. Contact a qualified service technician.
Fault: Suction Temp Sensor Failure An electrical connection or component has
failed. Contact a qualified service technician.
Fault: Discharge Pressure Transducer Failure An electrical component has failed. Contact a qualified service technician.
The flow of seawater is obstructed or
blocked. 1. Verify that the seacock is open and wa-
ter if flowing to the pump.
2. Clean the seawater strainer.
3. Check for a strong, steady flow from
the overboard discharge.
Fault: High Discharge Pressure
The seawater pump may be be airlocked. 1. Verify that the seawater plumbing is in-
stalled according to the instructions in
the installation manual included with
the air conditioning unit.
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EN 
Problem Possible cause Suggested remedy
2. Remove the hose from the pump dis-
charge to purge air from the line, then
replace.
The seawater pump is not running. 1. Ensure the pump is not damaged from
being run dry.
2. Verify that the pump is receiving volt-
age.
3. Check that water is flowing strongly out
of the overflow.
The condensing coil is dirty. Clean the condensing coil.
The seawater temperature is too high dur-
ing heating operation. Seawater temperature directly affects the
unit's efficiency. For the unit to heat (if the
reverse-cycle option is available), the wa-
ter temperature must be less than 65 °F (18
°C).
There is insufficient return airflow. 1. Remove any obstructions in the return
air stream.
2. Clean the air filter and the grille.
3. Check for crushed or restricted duct-
ing.
The ducting must be as straight,
smooth, and firmly supported as possi-
ble.
The return air pressure is too low during
cooling operation. The ambient temperature directly affects
the unit's efficiency. For optimum cooling,
the air temperature must be 65 °F (18 °C) or
higher.
The return air is restricted. 1. Remove any obstructions in the return
air stream.
2. Clean or replace the air filter and grille.
The seawater temperature is too low during
heating operation. Seawater temperature directly affects the
unit's efficiency. For the unit to heat (if the
reverse-cycle option is available), the water
temperature must be 40 °F (4 °C) or higher.
Fault: Low Suction Pressure
The system has lost refrigerant Contact a qualified service technician.
The supply voltage is too low. 1. Verify the voltage is correct at the pow-
er source.
2. If the problem persists, contact a quali-
fied service technician.
Fault: Compressor Start Failure
An electrical component has failed. Contact a qualified service technician.
Fault: Low Superheat A blower or expansion valve has malfunc-
tioned. Contact a qualified service technician.
Fault: Low Suction Temperature A blower or expansion valve has malfunc-
tioned. Contact a qualified service technician.
Fault: Clock Board Fault or Not Connected An electrical component has failed. Contact a qualified service technician.
Fault: AC Low Voltage The supply voltage is too low. 1. Verify the voltage is correct at the pow-
er source.
2. If the problem persists, contact a quali-
fied service technician.
Fault: AC High Voltage The supply voltage is too high. 1. Verify the voltage is correct at the pow-
er source.
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Problem Possible cause Suggested remedy
2. If the problem persists, contact a quali-
fied service technician.
Fault: DC Low Voltage The battery capacity is reduced. 1. Charge or replace the battery bank.
2. If the problem persists, contact a quali-
fied service technician.
Fault: DC High Voltage The supply voltage is too high. 1. Verify the voltage is correct at the pow-
er source.
2. If the problem persists, contact a quali-
fied service technician.
An electrical component has failed. Contact a qualified service technician. Fault: Communication Loss
Electrical noise interference. Ensure communication cables and connec-
tors are not in close proximity to power ca-
bles or large electrical equipment.
Fault: Overcurrent Alarm An electrical component has failed. Contact a qualified service technician.
Airflow is restricted due an object in the air-
flow path. Remove the obstruction from the heatsink
cooling airflow path.
Fault: High VFD Temperature
The cooling fan is not operating correctly. Contact a qualified service technician.
Fault: Fan Fault An electrical component has failed. Contact a qualified service technician.
Fault: Duplicate Zone Instance More than one unit in a network has been
assigned to the same zone ID. Check the zone assignments on all units
in the network to ensure each unit has a
unique zone ID. (how - and what is "unit" in
this case?)
Fault: Low Refrigerant A mechanical interface has failed and lost
refrigerant. Contact a qualified service technician.
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EN 
10 Disposal
Place the packaging material in the appropriate recycling waste bins, wherever possible. Consult a local recycling cen-
ter or specialist dealer for details about how to dispose of the product in accordance with the applicable disposal regu-
lations.
11 Warranty
Refer to the sections below for information about warranty and warranty support in the US, Canada, Australia, New Zealand, and
all other regions.
United States and Canada
LIMITED WARRANTY AVAILABLE AT DOMETIC.COM/EN-US/TERMS-AND-CONDITIONS-CONSUMER/WARRANTY.
IF YOU HAVE QUESTIONS, OR TO OBTAIN A COPY OF THE LIMITED WARRANTY FREE OF CHARGE, CONTACT:
DOMETIC CORPORATION MARINE
CUSTOMER SUPPORT CENTER
2000 NORTH ANDREWS AVENUE
POMPANO BEACH, FLORIDA, USA 33069
1-800-542-2477
Asia-Pacific(APAC) Countries
If the product does not work as it should, please contact your retailer or the manufacturer’s branch in your country (see the back
of this instruction manual for the web addresses to locate your region or retailer). The warranty applicable to your product is 1
year.
For repair and warranty processing, please include the following documents when you send in the device:
• A copy of the receipt with purchasing date
• A reason for the claim or description of the fault.
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replace-
ment or refund for a major failure and for compensation for any other reasonably foreseeable loss or damage. You are also enti-
tled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a ma-
jor failure.
Australia Only
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replace-
ment or refund for a major failure and for compensation for any other reasonably foreseeable loss or damage. You are also enti-
tled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a ma-
jor failure.
New Zealand Only
This warranty policy is subject to the conditions and guarantees which are mandatory as implied by the Consumer Guarantees
Act 1993(NZ).
All other regions
The statutory warranty period applies. If the product is defective, please contact the manufacturer’s branch in your region or your
retailer (see the back of this instruction manual for the web addresses to locate your region or retailer).
For repair and guarantee processing, please include the following documents when you send in the device:
• A copy of the receipt with purchasing date
• A reason for the claim or description of the fault
20