16
EN
Control Parameters
However, if the temperature is below 50 °F (10 °C), a
heating cycle will begin. The heating cycle will continue
until the temperature reaches 50 °F (10 °C) or until the
heating cycle runs a maximum of one hour.
Four hours after the temperature is satisfied or the
cooling/heating cycle times out, the entire cycle
repeats, each time determining whether cooling or
heating is required.
I
For DX systems only: on systems configured with
reverse-cycle heat, the dehumidification mode heat
cycle will not run when the ambient temperature
is below 40 °F (4 °C). This protects the condenser
coil from freezing. Systems configured with auxiliary
electric heat will run the dehumidification mode
heat cycle regardless of the room temperature.
The word “Dehumidify” displays when the control is in
dehumidification mode. It flashes if the optional humidity
sensor is connected and operating in the cooling mode.
8 .3 Understanding the Fan Modes
This section describes the available fan modes.
8 .3 .1 Automatic
The automatic fan mode allows the Smart Touch Cabin
Control to determine the required fan speed based
on the temperature differential. This permits a balance
between the most efficient temperature control and
slower, quieter fan speeds.
Three automatic fan speeds are available: high, medium
and low.
To select automatic fan mode, press and release the fan
icon until the word “Auto” displays above the graph.
8 .3 .2 Manual
The manual fan mode maintains a selected, desired fan
speed. When a manual fan speed is selected, the fan
speed bar graph indicates the speed. The bar level will
increase as you increase the speed setting.
Three manual fan speeds are available: high, medium
and low.
To select a manual speed, press and release the fan icon
until the desired speed is reached.
8 .3 .3 Fan-Only
The fan-only mode operates the fan for air circulation
when no cooling or heating is desired.
Three fan-only speeds are available: high, medium, and
low.
Beginning in Off mode, press and release the fan icon
until the desired speed is reached. Press and release a
fourth time to turn off the fan or place it in auto mode.
I
Turning on the control will revert the fan to the
automatic mode or the last selected manual fan
setting.
8 .3 .4 Cycled Fan
The cycled fan mode operates the fan only during
heating or cooling cycles.
When used with an optional electric heater, the fan
remains on for four minutes after the heater cycles off.
8 .3 .5 Continuous Fan
The continuous fan mode operates the fan continuously
as long as the system is in On mode.
9 Control Parameters
NOTICE:
If the air conditioning unit is cool-only (does
not
have a reversing valve), then you
must
set the DX
heat pump/cool-only mode to “Cool Only”. Once
this parameter is set, the operational mode selections
are limited to off, cool, optional auxiliary heat, and
dehumidification. See the section heat pump/cool-only
mode on page 23.
NOTICE:
If the air conditioning unit has a shaded-
pole (SP) fan motor, you
must
program “SP” into
general setting 8 (fan motor type) before operating the
equipment. The SP unit has an overhanging blower
motor. However, the split-capacitor (SC) high-velocity
(HV) fan motor is inside the blower, and the unit will have
“VTD” or “HV” in the model number. Only reprogram
this general setting if you do
not
have an HV blower.
This section describes the settings available in the
different software menus.
Summary of Contents for MCS-CTRL
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