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Frequently Asked Questions about the AccuTech CS VFD Compass
/ Outside Temperature System
Q: What should I do if the compass display doesn't turn on (won't
display anything)?
A: Check the connections in the four-pin power connector. Verify
with a multi-meter that you +12 VDC Battery (constant) voltage on
the Red wire. If your motorhome or trailer has a battery disconnect
switch in it, make sure it is turned on. If the compass is wired
to the house batteries and the disconnect switch is turned off the
unit will not work. Verify that you have +12VDC ignition (switched)
voltage on the Orange wire, and that you have a good chassis ground
on the Black wire.
Q: What should I do if the display won't dim and brighten when
the headlights are turned on and off?
A: Make sure that the White wire in the four-pin power connector
has been hooked up. Verify with a multi-meter that you have +12
VDC on the White wire when the headlights are on and zero volts
when the headlights are off.
Q: What should I do if the compass won't calibrate, "CAL"
still flashing?
A: Make sure you follow the calibration procedure correctly and
that after you push the F/C button to start the calibration countdown
timer you drive the vehicle in a circle at a speed which allows
you to complete 2-4 full circles while the display is counting down
from 60 to 0. If the heading (N, NW, W…) is flashing you can
not successfully calibrate the compass. You must correct the problem
causing the heading to flash before trying to calibrate the compass
- see the next question for further assistance.
Q: What should I do if the compass heading (N, NW, W…)
is flashing and not changing direction as I turn?
A: Check for a loose or bad connection in the 3-wire compass sensor
harness. Verify that the wires are snapped in the 3-pin housing
securely, at both ends of the harness, and check for a cut, broken
or shorted wire in the harness. Make sure the harness connectors
are tightly plugged into the display at one end and the sensor module
at the other end.
Q: What should I do if the Temperature display is flashing?
A: Check for a loose or bad connection in the 2-wire temperature
sensor harness. Verify that the wires are snapped in the 2-pin housing
securely, at both ends of the harness, and check for a cut, broken
or shorted wire in the harness. Make sure the harness connectors
are tightly plugged into the display at one end and the sensor at
the other end.
Q: What should I do if the temperature reading is inaccurate?
A: Make sure the temperature sensor is mounted in a location away
from external heat sources. The sensor should be mounted in a location
that allows fresh air to blow over it as you drive. If the temperature
display reads -40 degrees F the sensor or the harness has an open
connection in it. If the temperature display reads 127 degrees F
the sensor or the harness has a short in it.
Q: What should I do if the compass direction reading is inaccurate?
A: Refer to the owner's manual and make sure you have the correct
zone selected for where you are located. Make sure the compass sensor
is mounted in an interior location with the labeled side facing
up and the direction arrow facing the front of the vehicle directly
inline with the axis of forward travel. Make sure the compass is
mounted on a level plane. If the compass sensor has been or needs
to be moved to a new location, you will have to recalibrate the
compass after it has been moved. When the compass is being calibrated,
as you turn in a circle, it locates the strongest magnetic reading
(North) and the weakest magnetic reading (South), which should be
180 degrees apart. By doing this it can compensate for any magnetic
interference caused by the surrounding metal body parts and electronics.
IT cannot however compensate for changing magnetic interference
such as that caused by a blower motor being turned on or off, or
interference from powerful speaker magnets. You should try to mount
the compass sensor in a location that is as far away as possible
from these changing magnetic interference sources. Usually 3 feet
away from most motors and speakers is sufficient.
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