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VECTOR COMPACT
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display panel touch pad) air sensor unless this program parameter is set to one (1). This program is utilized only if the a/c unit is
used to supply air to two different locations, i.e., salon and aft cabin, and if it is desired to control the temperature from either of
these locations at different times of the day, i.e., day and night. The remote air sensor should be installed in the return air stream
behind the return air grille. In this case, the display panel would be in a different room than the a/c unit. If the a/c unit and display
panel are in the same room, mount the remote air sensor in the other room using the same guide lines for locating the display
panel as stated in "Passport II Display Panel Installation" in this manual. To activate program, set parameter to one (1). To
toggle from sensor to sensor, simultaneously press the fan and up buttons while a/c unit is on. When the alternate air sensor is
operating, the letter "A" will appear in the display window while viewing the set point. To view set point press either up or down
button. The factory default is zero (0).
U 9 REVERSED FAN SPEEDS DURING HEATING: During normal operation in the cooling mode with the fan speed set
to "A" (automatic), the fan speed is reduced as the set point temperature is approached. During heating, this is not always the
preferred method of operation. When this parameter is set to one (1), the fan speed will increase as the set point is approached
during heating. This will reduce head pressure by increasing air flow across the coil as the set point is approached. As the
ambient cabin temperature rises, the fan speed will slow which will increase head pressure making the air seem warmer. Setting
the parameter to zero (0) will cause the fan speed to decrease as the set point is approached during heating, as it does in the
cooling mode. The factory default is one (1).
U10 CONTINUOUS FAN OPERATION OR CYCLE FAN WITH COMPRESSOR: The fan can be programmed to
run continuously while the system is on, or can be allowed to cycle with the compressor. When cycled with the compressor, the
fan will only operate when cooling or reverse cycle heating is called for. To cycle the fan with the compressor, select zero (0).
To operate the fan continuously, select one (1). The factory default is one (1).
U11 REVERSE CYCLE OR ELECTRIC HEAT: Units not equipped with reverse cycle heating, or reverse cycle units
operating in sea water temperatures below 408 F, may need to have electric heaters added. IMPORTANT: the Passport II
circuit board reversing valve output is used to control the optional electric heater. The valve output relay can only carry 6 amps,
therefore, a heavy-duty contactor must be installed to carry the electric heater current. Select one (1) for the electric heat option,
select zero (0) for reverse cycle heating. The factory default is zero (0).
U12 FAN MOTOR TYPE SELECTION: This feature allows the controller to be programmed for the type of motor on the
unit’s fan. Zero (0) selects a shaded pole motor, which is used on most Vector Compact units. Select one (1) for units having
"HV" or "EBM" in their model number, these units have a split capacitor motor. The controller has been factory programmed for
the appropriate motor type.
U15 DE-ICING CYCLE: Under certain extreme conditions ice may build up on the evaporator coil. Running the a/c at a low
set point with the hatches and doors open on a hot humid day would be an example of this. If the a/c runs for an hour in cool
mode and during that time the ambient temperature does not change by more than one degree, the de-icing cycle will activate
turning the unit into reverse cycle heat for one to three minutes depending on the setting. The programmable parameter may be
set at zero (0), one (1), two (2), or three (3) minutes. If the evaporator coil is still iced up after three minutes, see the trouble
shooting section of this manual. The factory default is zero (0), which is off.
GENERAL TROUBLESHOOTING GUIDELINES
Also see specific a/c control troubleshooting sections following these general guidelines.