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Smart Touch Cabin Control Installation & Operations Manual
4.
Inside Temp Calibration This setting calibrates the ambient sensor within a range of ±10°F. Adjust this parameter to
display the correct room temperature reading. Note that setting increments are in °F even when the control is set to
display °C.
5.
Temperature Units (°F/°C/Auto) The default setting is °F. Select °C for
Celsius. (Celsius readings are displayed in tenths, for example 22.2°). Auto
corresponds to "automatic by line frequency", where 60 Hz automatically
sets the unit to Fahrenheit or °F, and 50 Hz automatically sets the unit to
Celsius or °C.
6.
Reversed Fan Speed in Heat Reverse Automatic Fan Speeds during
Heating allows the user to automatically reverse the fan speed during Heat
Mode. This is to improve heat output in cooler climates. The fan will speed
up as the set point is approached. Lowering the fan speed when the cabin is
cold increases head pressure and helps raise supply temperature.
Increasing the fan speed as the set point is approached also reduces
unnecessary high-pressure faults. The fan switches to low speed when the set point is satisfied and the compressor
cycles off. The fan can be programmed to operate the same as in cooling by selecting the Off option, which represents
normal fan operation during reverse-cycle heating.
7.
Electric Heat Option (On=use electric heat, Off=use reverse-cycle heat) Reversing valve toggle (energizing of
reversing valve output) will not occur prior to compressor start-ups if electric heat is on. The valve output and Electric
heat relay (for legacy PPIO boards) will both be energized when DX electric heat is called for. For CW systems,
On=use electric heat and/or hydronic heat, Off=use only hydronic heat. The compressor output will be energized when
CW electric heat is called for. Units not equipped with reverse-cycle heat may have an electric heater added. Set to
"On" for the electric heat option or "Off" to disable. When programmed for electric heat, both the electric-heater relay
and the valve relay are energized. This change supports newer circuit board revisions without the electric-heater relay.
Therefore, circuit boards that do not have electric-heater relays require a display with software revision A15 or newer
to properly energize the valve relay. Also, since the valve-relay output only supports a maximum of 15 amps at
115V AC or 10 amps at 230V AC (circuit boards revision F and newer) of resistive load, when installing an optional
electric heater that exceeds this load, it is necessary to install an additional contactor that is rated to handle the full
load of the electric heater. Please consult with Dometic Customer Service or with an authorized service technician for
assistance.
8.
Fan Motor Type The Split Capacitor default setting is correct for air conditioning units with high-velocity blowers. Only
change the setting to Shaded Pole if your unit has a Shaded Pole fan motor, recognizable by a blower-motor overhang.
(The Split Capacitor motor of a high-velocity unit is inside the blower, and the unit has "VTD" or "HV" in the model number.)
9.
Filter Hours Setting Reminder for air filter cleaning or replacement is determined by the number of hours of fan operation.
Filter Hours Setting can be set as a reminder to clean or replace the unit's air filter. Select the number of operating hours
until the filter reminder appears. Parameter choices are between 100 hours and 2500 hours. Dometic recommends that you
check the air filter at least every 500 hours of operation. The default setting is off. Once set, the timer keeps track of the total
amount of run hours that the fan accumulates. Once the timer setting is reached, flashes briefly on the status icon until it is
cleared. Display of the room temperature continues and the normal operation of the system is not affected. The reminder
can only be cleared and the timer reset via General Setting, and then Filter Hours Setting.
10. Filter Hours Reset The Filter Hour Reset setting shows the number of filter
reminder hours accumulated and allows clearing via a CLR icon. This
parameter displays the current elapsed time in hours since the timer was
started or reset. To clear the reminder, press the CLR icon. This resets the
value to 0 and restarts the timer.
L-3380 ENGLISH
OPERATION
Figure 12: Smart Touch General
Settings Page 2 of 7
Figure 13: Smart Touch General
Settings Page 3 of 7
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