Dometic CapTouch Installation And Operating Manual page 38

Troubleshooting
Problem Possible Causes
A low-AC voltage
The supply voltage is too low.
fault is present.
The voltage is improperly calibrated, if
applicable.
The air
The display is experiencing a power
conditioning unit
interruption, voltage frequency fluctuation,
does not respond
electromagnetic interference from other
to the changes
equipment, or similar power-related issue.
entered on the
display.
The circuit board is recognizing previously
connected displays.
The display-cable plugs are not making
contact (for example, the plugs are
unplugged, dirty, bent, or have broken pins).
The display may show '999' or '- - -' if unable
to communicate with the unit.
The display buttons do not function.
The display and the circuit board are not
compatible.
The display does
The display is showing a code for a faulty
not show the
air sensor, typically because there is a
correct room
failed: display built-in temperature sensor,
temperature.
optional inside air temperature sensor, or
display cable.
The temperature displayed is too high.
The temperature displayed is too low.
The temperature adjusts too quickly or still
does not read correctly.
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Recommended Solution
Use a multimeter to verify that constant, steady power is available to the
unit.
• Use a multimeter to verify that the voltage reading to the unit matches
the voltage calibration in the parameters.
• Adjust the voltage calibration if necessary.
Perform a factory reset of the display:
1. Turn the power off.
2. Disconnect the cable from the display.
3. Turn the power on, wait 20 seconds, and turn the power off.
4. Reconnect the cable to the display.
5. Turn the power on.
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This will cause all the parameters to reset to the factory default
settings.
• With the power off at the circuit breaker, remove the connector and
inspect it.
• Clean the socket and the cable with electrical contact cleaner.
• Work the cable in and out of the socket. If damaged, replace the
connector or the display cable.
The display is locked. Unlock the display.
• Ensure the compatibility between the circuit board and the display.
Some older boards will not work with newer displays and some newer
boards will not work with older displays.
• If the rebooted circuit board and display unit continue to act oddly,
replace the display cable.
• Replace the optional inside air temperature sensor.
• If using the display built-in temperature sensor, replace the display or
add an optional inside air temperature sensor.
• Install a different display cable.
• Ensure that the damaged jack/socket in the display head or on the
circuit board is not damaged.
• If the temperature displayed is within 50 °F above the actual
temperature, use calibration parameter 4 to adjust.
• If the temperature displayed is hotter than 50 °F above the actual
temperature, adjust the JP5 jumper on the unit's circuit board.
• Refer to the optional inside air temperature sensor note.
• If the temperature displayed is within 50 °F below the actual
temperature, use calibration parameter 4 to adjust.
• If the temperature displayed is colder than 50 °F below the actual
temperature, adjust the JP5 jumper on the unit's circuit board.
• Refer to the optional inside air temperature sensor note.
Relocate the display or the optional inside air temperature sensor. The
supply air should not blow on or near a sensor. Locate optional inside air
temperature sensors in the return air stream, not physically touching any
part of the unit.
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Optional inside air temperature sensor note: if the unit uses an
optional inside air temperature sensor, it will be either an RJ11 4-pin
3,000 K sensor or an RJ12 6-pin 10,000 K sensor.
If the 6-pin sensor is installed, the JP5 jumper must be removed
from the board. If neither sensor is installed on the circuit board, the
display reads from its own built-in sensor, if applicable.
CapTouch Cabin Control
EN