Dometic Smart Touch Cabin Control User manual

COPYRIGHT © 2011-2018 Dometic Corporation. All Rights Reserved.
No part of this publication may be reproduced, translated, stored in a retrieval system, or transmitted in any form or by any means
electronic, mechanical, photocopying, recording or otherwise without prior written consent by Dometic Corporation. Every precaution
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errors and omission. Neither is any liability assumed for damages resulting from the use of this product and information contained
herein.
Smart Touch Cabin Control
Installation & Operations Manual
Smart Touch Cabin Control
(shown without bezel)
Dometic Corporation
Rev. 20180628
L-3380 English
P/N 337767

L-3380 ENGLISH
Table of Contents
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
READ THIS MANUAL BEFORE PROCEEDING . . . . . . . . . 1
FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
STANDARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
OPTIONAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
HOW ITWORKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
THE IMPORTANCE OF SEAWATER TEMPERATURE . 1
DESCRIPTION OF CONTROL . . . . . . . . . . . . . . . . . . . . 2
IMPORTANT PROGRAMMING NOTES TO INSTALLER AND
END USER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
MEMORY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
NORMAL HEATING OR COOLING CYCLE . . . . . . . . . . . . 4
REVERSING VALVE OPERATION (FOR DX SYSTEMS ONLY)
4
INSTALLING THE DISPLAY PANEL . . . . . . . . . . . . . . . 4
CHOOSING THE LOCATION . . . . . . . . . . . . . . . . . . . . . 4
MOUNTING THE DISPLAY . . . . . . . . . . . . . . . . . . . . . . 5
MOUNTING THE OPTIONAL SENSORS . . . . . . . . . . . . . 6
REMOTE AIR SENSOR . . . . . . . . . . . . . . . . . . . . . 6
OUTSIDE AIR TEMPERATURE SENSOR . . . . . . . . . 6
SERVICE SENSOR (FOR DX SYSTEMS ONLY) . . . . 6
WATER INLET SENSOR (FOR CW SYSTEMS ONLY) 6
SEAWATER TEMPERATURE SENSOR - OPTIONAL (FOR
DX SYSTEMS ONLY) . . . . . . . . . . . . . . . . . . . . . . 6
HUMIDITY SENSOR - OPTIONAL . . . . . . . . . . . . . . 6
RECHARGEABLE BATTERY BACKUP . . . . . . . . . . . . 6
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
OPERATOR CONTROLS AND DISPLAY PANEL . . . . . . . . 7
HOME SCREEN ICON FUNCTIONS . . . . . . . . . . . . . 7
MAIN SCREEN ICON FUNCTIONS . . . . . . . . . . . . . 8
MODES OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . 9
OFF MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
ON MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
AUTOMATIC MODE . . . . . . . . . . . . . . . . . . . . . . . 9
COOL MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
HEAT MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
MOISTURE MODE . . . . . . . . . . . . . . . . . . . . . . . . 9
DEHUMIDIFICATION MODE INDICATOR . . . . . . . . . 9
FAN MODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
MAIN MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
CONTROL PARAMETERS . . . . . . . . . . . . . . . . . . 11
PROGRAM SCHEDULER . . . . . . . . . . . . . . . . . . . 18
DATE/TIME MENU . . . . . . . . . . . . . . . . . . . . . . . 18
SYSTEM MENU . . . . . . . . . . . . . . . . . . . . . . . . . 19
TROUBLESHOOTING/COMMISSIONING . . . . . . . . . 21
FAULT HANDLING, HISTORY & RUN HOURS . . . . 22
QUICK-START OPERATIONS CHECKLIST . . . . . . . . . . 23
MAIN MENU NAVIGATION TREE . . . . . . . . . . . . . . . . . 24
MAIN MENU PROGRAMMABLE PARAMETERS . . . . . . . 27
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . 32
GENERAL TROUBLESHOOTING . . . . . . . . . . . . . . . . . . 32
DIGITAL CONTROLS TROUBLESHOOTING . . . . . . . . . . 34
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
SYSTEM COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . 36
REVERSING VALVE (FOR DX SYSTEMS ONLY) . . 36
SEAWATER STRAINER (FOR DX SYSTEMS ONLY) 36
CONDENSER COIL (FOR DX SYSTEMS ONLY) . . . 36
RETURN-AIR FILTER . . . . . . . . . . . . . . . . . . . . . 36
WINTERIZATION (FOR DX SYSTEMS ONLY) . . . . . 36
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
OPERATIONAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
CABLE LENGTHS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
SYSTEM INPUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
WIRING DIAGRAMS FOR DX AND CW SYSTEMS . . . . . 38
CW SYSTEMS LAYOUT . . . . . . . . . . . . . . . . . . . . . . . 40

Smart Touch Cabin Control Installation & Operations Manual INTRODUCTION
L-3380 ENGLISH 1
INTRODUCTION
The Smart Touch Control is a microcontroller-based unit designed for use with direct expansion (DX), reverse-cycle air
conditioning systems.
READ THIS MANUAL BEFORE PROCEEDING
Read this manual completely before you proceed with the installation and operation of the Smart Touch. If you have questions
or require assistance with your Smart Touch control, contact the Dometic Marine Service Department at [phone].
The Smart Touch is covered under existing Dometic Owner’s Limited Warranty Policy. Incorrect installation, neglect and system
abuse are not covered under the Dometic warranty policy.
FEATURES
STANDARD
OPTIONAL
This manual provides all necessary information for proper installation and operation of the Smart Touch Display. Poor
installation and misunderstood operating parameters will result in unsatisfactory performance and possible failure.
HOW ITWORKS
The basic principle behind an air conditioner is the movement of heat. In a marine DX air conditioner, heat is removed from the
inside cabin air and transferred to the seawater. In reverse-cycle heating, the refrigerant flow is reversed and heat is extracted
from the seawater and discharged into the living space. The efficiency of the system operation depends on both seawater and
cabin temperatures.
THE IMPORTANCE OF SEAWATER TEMPERATURE
In Cool Mode, the air conditioner will operate most efficiently in seawater temperatures below 90°F (32°C). At higher seawater
temperatures the unit will operate, but at a reduced capacity. A high-pressure shutdown may occur at higher seawater
temperatures.
In Heat Mode, the opposite is true. As the seawater gets colder, there is less heat available, and the heating efficiency is
reduced. Full heating capacity is obtained at approximately 55°F (13°C) seawater temperature. Performance drops to about
50% of rated capacity in 40°F (4.4°C) water. Below this, the system pressure can be so low that the unit will shut down on a low-
pressure fault. This problem is compounded when the cabin is also cold. See “Digital Controls Troubleshooting” on page 34.
• User-friendly touchscreen display
requires no manual for basic operation.
• Dehumidification control. Programmable compressor
staging delays.
• 5-volt logic and microcontroller located
in the display.
• Universal 220/115-230 volt, 50/60 Hz AC power
supply.
• Automatic and three programmable
manual fan speeds.
• Nonvolatile memory retains settings without
batteries.
• 22 programmable parameters for
custom installations.
• Programmable display-brightness control.
• Moisture Mode for controlling relative
humidity.
• Programmable failsafe modes.
• De-icing cycle to prevent evaporator coil
icing.
• Fits Vimar® Eikon and Eikon EVO switch bezels.
• Dehumidification control.
• Outside air temperature sensor. • Auxiliary heating control capabilities.
• Alternate air temperature sensor. • Humidity sensor for advanced humidity control.
• Pump Sentry water sensor. • CAN-bus network capability.
• Electric heating control capabilities. • Air Filter Cleaning or Replacement Timer.
• Seawater inlet temperature sensor. • Low-Voltage Monitor.

INTRODUCTION Smart Touch Cabin Control Installation & Operations Manual
2L-3380 ENGLISH
DESCRIPTION OF CONTROL
See Figures 1 and 2 to identify Home and Main screen displays.
Figure 1: Smart Touch Home Screen
Smart Touch Home Screen Display Layout
1. Temperature Indicator icon (Inside, Set Point, Outside, Water Temperatures, and Humidity)
2. Up icon - Raise temperature set point
3. Down icon - Lower temperature set point
4. Main Screen icon
5. Power icon
WARNING
Do not operate your air conditioning unit in water that is cooler than 38°F (3.3°C). Doing so could lead to
water freezing in the condenser coil which can cause damage to the unit.
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Smart Touch Cabin Control Installation & Operations Manual INTRODUCTION
L-3380 ENGLISH 3
Figure 2: Smart Touch Main Screen
Smart Touch Main Screen Display Layout
1. Mode Selection icon
2. Home Screen icon
3. Up icon - Raise temperature set point
4. Fan Mode Selection icon
5. Fan Mode Indicator (Auto, high, medium, low)
6. Temperature Indicator (Inside, Set Point, Outside, Water, and Humidity)
7. Down icon - Lower temperature set point
8. Menu icon
9. Status & Schedule icon
10. Power icon
IMPORTANT PROGRAMMING NOTES TO INSTALLER AND END USER
1. If your air conditioning unit is Cool only (if it does not have a reversing valve), then you MUST select Cool Only Mode.
DO NOT select Automatic Mode for a Cool Only unit. If Automatic Mode is selected and the thermostat calls for heat,
the compressor will run. Since there is no reversing valve, the air conditioning unit will supply cool air when heating is
desired. Cool Only units do not heat. See “Modes of Operation” on page 9 for more information on how to set the
proper operating mode.
2. If your air conditioning unit has a Shaded-Pole (SP) fan motor instead of a Split-Capacitor (SC) High-Velocity (HV) fan
motor, you MUST program “SP” into General Setting 8, “Fan Motor Type”, before operating the equipment. The SP
units are recognizable by an overhanging blower motor. (The SC motor of an HV unit is inside the blower, and the unit
has “VTD” or “HV” in the model number.) Only reprogram this General Setting if you do NOT have an HV blower.
NOTICE
The system’s air sensor is located in the control’s display panel; therefore the display MUST be located on
an interior wall at eye level. It must NOT be located in direct sunlight or inside a cabinet. If these
conditions cannot be met, you must purchase the Optional Remote Air Sensor and install it in the return-
air stream.
NOTICE
Do not staple any sensor cables when mounting.
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INSTALLING THE DISPLAY PANEL Smart Touch Cabin Control Installation & Operations Manual
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MEMORY
When the Smart Touch losses power, the operating parameters are retained for up to 2 years. When power is restored, the
control resumes operating as last programmed. The Smart Touch has a battery backup. If the battery backup is removed, only
time and date settings will be lost.
NORMAL HEATING OR COOLING CYCLE
In Automatic Mode, heating and cooling are supplied as required. If cooling is required, the system will start a cooling cycle
when the cabin temperature exceeds the set point by 2°F (1.1°C) and will continue to cool until the temperature equals the set
point. (See “General Setting, Set Point Temperature Differential”, on page 13 for instructions on how to reduce this variation to
1°F [0.55°C].) The cabin temperature must drop below the set point by at least 4°F (2.2°C) in order for the system to switch from
cooling to heating. Similarly, if heating is required, the system will start a heating cycle when the cabin temperature is below the
set point by 2°F (1.1°C) and will continue to heat until the temperature equals the set point. The cabin temperature must exceed
the set point by at least 4°F (2.2°C) in order for the system to switch from heating to cooling. If you select Cool Mode, only
cooling is supplied. If you select Heat Mode, only heating is supplied. The cabin temperature in either mode is maintained within
2°F (1.1°C) of set point by default. (See “General Setting, Set Point Temperature Differential”, on page 13 for instructions on
how to reduce this variation to 1°F [0.55°C].) When the heating or cooling set point is satisfied, the compressor cycles off and
the fan returns to low speed. The fan speed remains constant if Manual Fan Speed is selected. For more information on this
feature, see “Modes of Operation” on page 9.
(For CW systems only)
When cooling or heating is required, the water valve will not open unless the water temperature is adequate. You can view
the water temperature by pressing the Temperature indicator icon until the Water temperature is displayed. The fan remains in
low speed until the adequate water temperature is available. Heat will be supplied when no heating is available (water
temperature is inadequate) only if the Optional Electric heater has been installed and programmed.
Adequate cooling or heating water temperature is defined by the Water Temperature Differential setting, under CW Control
Parameters. Its factory default is set at 15°F (8.3°C) differential from the ambient air temperature.
REVERSING VALVE OPERATION (FOR DX SYSTEMS ONLY)
The position of the reversing valve determines if the system is in Cool Mode or Heat Mode. In addition, the reversing valve is
programmed to toggle in these situations:
• When the system is running and heating or cooling is required, the reversing valve toggles to the opposite mode to
reduce the starting surge of the compressor.
• When a cooling or heating cycle is called for and if the system has been off for less than 5 minutes.
• When a cycle is interrupted from the display panel by pressing the Power icon or changing the set point.
Unnecessary valve toggling is limited to reduce reversing valve noise. You can totally eliminate valve toggling by programming
the minimum compressor staging delay to 5 minutes or greater (see “DX Operational Setting Compressor Start Delay” on
page 15 for more information). Power-On Reset, which occurs when the system is powered up, always initiates a valve toggle.
INSTALLING THE DISPLAY PANEL
CHOOSING THE LOCATION
Figure 3: Smart Touch Display Front Panel

Smart Touch Cabin Control Installation & Operations Manual INSTALLING THE DISPLAY PANEL
L-3380 ENGLISH 5
Before mounting the control panel, consider the location. The display panel’s built-in air sensor provides excellent room-air
temperature sensing when properly located and installed. For air sensor location see Figure 3. Mount the display panel on an
inside wall, slightly higher than mid-height of the cabin, in a location with freely circulating air where it can best sense average
temperature. Its distance from the air conditioner must be within the 15 ft (4.5 m) length of the display cable (custom lengths
available).
Do not mount the display in direct sunlight, near any heat-producing appliances or in a bulkhead where temperatures radiating
from behind the panel may affect performance. Do not mount the display in the supply-air stream. Do not mount the display
above or below a supply-air or return-air grille. Do not mount the display behind a door, in a corner, under a stairwell or any
place where there is no freely circulating air. If you cannot mount the display in a suitable location for accurately sensing room
temperature, install the optional remote air sensor.
MOUNTING THE DISPLAY
1. Make the cut-out for the display panel. Cut-out size is 2.900" (7.36 cm) wide by 2.165" (5.50 cm) high.
2. Plug one end of the display cable (8-pin connector) into the upper-right socket on the circuit board in the electric box
and the other end into the back of the display panel.
Figure 4: Smart Touch Display Mounting Dimensions
(Drawing not to scale – not a template)
3. Secure the display panel to the bulkhead using the four screws provided. Do not use a screw gun and do not over
tighten screws when mounting, because either method may damage the display.
4. When the display is securely mounted, mount the bezel over the display frame until it snaps into place.
Figure 5: Smart Touch Display Top View Mounting Dimensions

RECHARGEABLE BATTERY BACKUP Smart Touch Cabin Control Installation & Operations Manual
6L-3380 ENGLISH
MOUNTING THE OPTIONAL SENSORS
REMOTE AIR SENSOR
Install the optional remote air sensor if the display cannot be mounted in a proper location for accurately sensing room
temperature. Installing the remote air sensor overrides the display’s built-in sensor. The standard cable length for the remote air
sensor is 7 ft (2.1 m).
1. Mount the remote air sensor in the return-air stream behind the opening of the return-air grille.
2. Plug its cable (6-pin connector) into the inside jack #J3 in the upper-left corner of the circuit board.
OUTSIDE AIR TEMPERATURE SENSOR
Install the optional outside air temperature sensor to monitor the temperature outside the cabin. Outside air sensor cables are
available in various lengths.
1. Mount the sensor outside but not in direct sunlight.
2. Plug its cable into the “OAT” plug #P6.
SERVICE SENSOR (FOR DX SYSTEMS ONLY)
Install the optional condenser coil temperature sensor into the “H2O OUT” plug #P5. Use of this sensor must be enabled by
going to DX Operational Setting and then Pump Sentry feature.
WATER INLET SENSOR (FOR CW SYSTEMS ONLY)
When using the AH Mode with a chilled-water air handler, plug the water-inlet sensor cable into the “H2O IN” plug #P4. Attach
the sensor to the chilled-water inlet on the air handler. Ensure that the sensor makes good contact with the copper pipe. DO
NOT attach to rubber hose.
SEAWATER TEMPERATURE SENSOR - OPTIONAL (FOR DX SYSTEMS ONLY)
Install the optional seawater temperature sensor to monitor the temperature of the seawater feeding the air conditioner. Ensure
that the sensor is in direct contact with the copper pipe and use thermal mastic to ensure good heat transfer. Strap the sensor
wire in place for strain relief and to prevent the sensor from being accidentally removed. Plug the sensor’s 2-pin connector into
the “Loop Water Out” (blue) socket located on the circuit board.
HUMIDITY SENSOR - OPTIONAL
Install the optional humidity/temperature combo sensor to monitor the relative humidity of the cabin. Locate the sensor in the
same location as the ambient air temperature sensor. Plug the combo sensor’s 6-pin connector into the inside temperature
socket located on the edge of the circuit board. The control board automatically detects the presence of this combo sensor and
immediately starts measuring humidity.
RECHARGEABLE BATTERY BACKUP
The Smart Touch comes with a rechargeable battery. The battery recharges whenever the control is powered, similar to a
computer motherboard battery, so there should never be a need to install or replace the backup battery. When the Smart Touch
is plugged into a control that is powered up, the battery is not being drained. Only when the AC power to the control board is
powered off is the battery being drained in the Smart Touch itself. The battery backup will last over two years of "powered-off
time” or inactivity.
When the battery drains due to inactivity, the only information that is lost is the date and time. No other information is lost. Also,
the screen lock PIN will be reset to its default ("1234") when the battery gets drained. All other programming parameters,
calibrations, program scheduler settings, etc., are retained in flash memory forever and do not use the battery power at all.
When the battery drains, there will be no visible indication on the display during normal power up. What will happen is that upon
a subsequent (AC) power down and power up, the user will immediately be prompted to set the date/time setting. This is their
indication that the battery got drained due to inactivity.

Smart Touch Cabin Control Installation & Operations Manual OPERATION
L-3380 ENGLISH 7
OPERATION
OPERATOR CONTROLS AND DISPLAY PANEL
HOME SCREEN ICON FUNCTIONS
Figure 6: Smart Touch Home Screen Icon Functions
1. Power On/Off Icon - Press and release to toggle between the On and Off Modes.
2. Up Icon - Press and release to display the set point. Press and release the Up icon as many times as desired to
increase the set point. Set point increases one degree each time the icon is pressed.
3. Down Icon - Press and release to display the set point. Press and release the Down icon as many times as desired to
decrease the set point.
4. More Icon - Press and release to change display to Main Screen.
5. Status Icon - Shows the system status. (OFF, PENDING, ACTIVE, STANDBY, FAULT)
6. Temperature Indicator Icon - Press and release to select from Set Point(s), Inside, Outside, Service/Water
Temperatures, and Humidity.
7. Force Sleep Mode Icon - Press and release to force sleep mode to initiate immediately, if enabled (i.e. Sleep Delay
not equal to OFF)
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OPERATION Smart Touch Cabin Control Installation & Operations Manual
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MAIN SCREEN ICON FUNCTIONS
Figure 7: Smart Touch Main Screen Icon Functions
1. Mode Icon Indicator - The Mode icon indicates the current mode active. Press and release to select one of the four
operating modes. Continue to press and release the Mode Icon until the desired operating mode is reached. The mode
icons (Auto, Cool, Heat, Auxiliary Heat, or Moisture) light to indicate which mode is selected. It shows 5 different icons
depending on the mode:
•Auto Mode Icon Indicator - The Auto Mode icon is shown when the system is in Automatic Mode, which switches
to cooling or heating as required to satisfy the temperature set point.
•Cool Mode Indicator - The Cool Mode icon is shown when the cool-only mode is selected or when the unit is in
an Automatic Mode cooling cycle.
•Heat Mode Indicator - The Heat Mode icon is shown when the heat-only mode is selected or when the unit is in
an Automatic Mode heating cycle.
•Auxiliary Heat Mode Indicator - The Auxiliary Heat Mode icon is shown when the Aux heat-only mode is
selected or when the unit is in an Automatic Mode Auxiliary heating cycle.
•Moisture Mode Indicator - The Moisture Mode icon is shown when the Moisture Mode is selected. This mode
controls humidity during periods when the vessel is unoccupied.
2. Fan Mode Indicator - Auto or Manual Indicator icon shows when Automatic fan speed or either of the three Manual
speeds are selected.
3. Power Icon - Press and release to toggle between the On and Off Modes.
4. Up Icon - Press and release to display the set point. Press and release the Up icon as many times as desired to
increase the set point. Set point increases one degree each time the icon is pressed.
5. Down Icon - Press and release to display the set point. Press and release the Down icon as many times as desired to
decrease the set point.
6. Fan Icon - Fan-speed operation is automatic, allowing fan speed to decrease as set-point temperature is approached
in the Cool Mode. The fan operates at low speed when set point is satisfied. Normally the automatic fan speed
operation is reversed in the Heating Mode; however, you can program the fan to operate the same as in the Cooling
Mode. Press the Fan icon to select manual fan speeds if you want to override automatic operation. You can program
the fan to run only during a cool or heat cycle; otherwise the fan runs constantly. Press and release to advance from
Auto Fan to Manual Fan. Press and release the Fan Icon to advance the manual fan speeds, from low to high. Press
and release again to return to the Automatic Fan mode. The selected Fan Mode is indicated by the Fan Indicator icon.
You can change the fan operating mode from Continuous to Cycled by going to Main Menu, Control Parameters,
General Settings, and then Fan Operate Mode.
7. Temperature Set Point and Humidy Indicator Icon - Press and release to select from Set point(s), Inside, Outside,
or Service/Water temperatures and Humidity.
8. Main Menu Icon - Press the Menu icon to show the Main Menu page.
9. Status/Schedule Icon - Press the Status/Schedule icon to view any fault occurring in the system.
10. Dometic/Date/Time Icon - This shows the date and time if enabled. To enable it, press Menu, Date/Time Menu, and
then Date/Time Display.
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