Dometic DX Remote & Self-Contained A/C, Installation And Operation Manual

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English L-2086 Operation
SMX Net Series
If your boat is equipped with the optional outside thermistor,
press TEMP a second time to display outside temperature.
Press a third time for an alternating display of setpoint, inside
temperature and outside temperature. Note that the inside
and outside indicators show you which temperature is being
displayed.
Cool Mode
To enter the COOL mode, press the COOL key. The Cool Mode
Indicator will light to show that you have selected the cooling
mode.
The Cooling Indicator will be lit whenever the system is in the
cooling mode and the compressor is actually running. When
the compressor cycles off, the Cooling Indicator goes off, but
the Cool Mode Indicator stays on.
Heat Mode
Press the HEAT key to select HEAT Mode. The Heat Mode
Indicator will light to show that you have selected the heating
mode.
The Heating Indicator will be lit whenever the system is in the
heating mode and the compressor is actually running. When
the compressor cycles off, the Heating Indicator goes off, but
the Heat Mode Indicator stays on.
Automatic Changeover
Press the COOL and HEAT keys simultaneously for AUTO-
MATIC CHANGEOVER between COOL and HEAT Modes.
The mode indicators will light, to show that the system is in the
automatic changeover mode.
For the SMXir Remote Control only - Press the Auto Switchover
key to enter automatic changeover mode.
Note that the Cooling or Heating Indicator will come on when
the compressor is running to show when the system is running
in the cooling or heating mode.
Manual Fan Speed Control
Press the FAN key to select manual fan control. The Manual
Fan Indicator will light to show that it is in the manual mode.
Then use the SLOW and FAST keys to select the desired fan
speed.
Note that you can use the manual fan control to circulate air
even when the system is in the OFF mode.
Automatic Fan Speed Control
If in manual fan mode, press FAN key to select automatic fan
control. The Manual Fan Indicator goes off, and the system will
automatically adjust fan speed as the actual cabin temperature
deviates from the setpoint. As setpoint is approached, the fan
speed automatically slows. Once setpoint is reached, the com-
pressor cycles off and the fan keeps running on low speed.
Adjusting Brightness
Pressing the SET key repetitively will dim the LED display.
Keep pressing SET to return to full brightness.
Note
SMXLB keypads automatically adjust according to cabin light-
ing.
Using The Humidity Control Rou-
tine
When engaged, the SMX humidity control routine automati-
cally turns the air conditioning system on at timed intervals to
remove moisture from the air. The system is programmed at the
factory for average values. To change the factory settings, see
“Humidity Control Program”.
To start the dehumidification program:
• Press OFF.
• Press COOL, HEAT and FAN keys simultaneously.
For the SMXir Remote Control only - Press the Dehumid
key to enter dehumidification mode.
• The data display will flash HU, indicating that the program is
active.
• To halt the dehumidification program, press any key. The
HU message will stop flashing.
Safety Note
Whenever the SMX system is in the dehumidification mode, all
of the system safeguard controls remain active. If the seawater
flow fails or if line voltage falls below preset limits, the system
will automatically shut down. If AC power is interrupted, the
system will automatically resume operation in the dehumidifica-
tion mode when power is restored.
Anti-Ice Routine
The SMX control will occasionally shut down the compressor in
the cooling mode to allow any ice that may have formed on the
evaporator coil to melt. The anti-ice shutdown only occurs at
inside temperatures lower than 70°F (21°C).
In a 10 minute cycle period, the compressor will shut off for
15 seconds per degree (°F) below 70°F. For example, if the
inside temperature is 67°F, the compressor will shut off for 45
seconds every 10 minutes.