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AH-Elite Control Operations Manual
•
Select Operating Mode - Mode button - Press and release to select one of the four operating modes. Continue to
press and release the Mode Button until the desired operating mode is reached. The mode LEDs (Auto, Cool, Heat, or
Moisture) light to indicate which mode is selected.
•
Outside Air Temperature - Up & Down buttons - Simultaneously press the Up and Down buttons while in the On
Mode to display outside air temperature (if the optional outside air temperature sensor is installed).
•
Program Mode - Up & Down buttons - Simultaneously press the Up and Down buttons while in the Program Mode to
set new program defaults.
•
Chilled-Water-Inlet Temperature - Power & Up buttons (On Mode) - Simultaneously press the Power and Up
buttons to view the chilled-water-inlet temperature.
•
Keypad Lock - Up, Down & Fan buttons - In any mode (including Off), simultaneiously press the Up, Down, and Fan
buttons to toggle the keypad lock on or off. LC will display momentarily when display has been locked, or UL will
display momentarily when display has been unlocked. Once locked, all key presses will be ignored, including the
Power button. The only exception is the double-key Chilled-Water-Inlet Temperature - Power & Up buttons. (Software
revision B28 and newer.)
M
O
ODES OF
PERATION
O
M
FF
ODE
When the control is in Off Mode, all control outputs are turned off. Program parameters and user settings are saved in
nonvolatile memory. The Program Mode can only be accessed from the Off Mode.
O
M
N
ODE
When the control is in On Mode, power is supplied to the appropriate outputs and the display indicates the current state of
operation. The operating and program parameters resume based on those last stored when the unit was operating.
A
UTOMATIC
When Automatic Mode is selected, the system provides both heating and cooling as required. The Auto Mode LED is lit as well
as either the Heat Mode LED or Cool Mode LED, depending on which mode is in use. Cabin temperature in a given mode is
maintained within 2°F (1.1°C) of set point by default. (See "P-23: Set Point Temperature Differential" on page 9 for instructions
on how to reduce this variation to 1°F [0.55°C].) If the system was most recently cooling, 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 the system was most
recently heating, 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. This behavior prevents small temperature overshoots from causing the system to switch between heating
and cooling when it is not necessary.
C
M
OOL
ODE
When Cool Mode is selected, the Cool LED is lit and only the cooling system operates as required. If the ambient temperature
drops below the set point, the system will not automatically switch to the Heat Mode.
H
M
EAT
ODE
When Heat Mode is selected, the Heat LED is lit and only the heating system operates as required. If the ambient temperature
rises above the set point, the system will not automatically switch to the Cool Mode.
M
M
OISTURE
Use Moisture Mode to help control humidity while you are away from the boat or away from a particular cabin. While the control
is in the On Mode, press the Mode button until the Moisture Mode LED is lit. Once Moisture Mode is enabled, the fan circulates
the air for 30 minutes. During this time, the air temperature is sampled and entered into memory. After 30 minutes, a cooling
cycle starts and continues until the temperature is lowered 2°F (1.1°C) or until the cooling cycle runs a maximum of one hour.
Four hours after the temperature is satisfied or the cooling cycle times out, this cycle repeats.
For software revision B23 and newer, Moisture Mode will also prevent your boat or a particular cabin from dropping below a
minimum temperature as a means to prevent the contents from freezing. When the temperature drops low, eliminating moisture
may become less of a concern and maintaining some minimum temperature may become more important. After the 30-minute
fan circulation, if the temperature is at or above the factory default setting of 50°F (10°C), a cooling cycle is started and runs as
described above. However, if the temperature is below 50°F (10°C), a heating cycle will be started instead. 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. See "P-24: Moisture Mode Minimum Temperature" on page 9 for more information on how to
adjust the 50°F (10°C) factory default to a different temperature that may better suit your particular requirements. The
adjustment range is 40°F (4.4°C) to 75°F (23.9°C).
L-2229 ENGLISH
M
ODE
ODE
Modes of Operation
5
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