Troubleshooting - Dometic CapTouch Installation And Operating Manual

CapTouch Cabin Control

8 Troubleshooting

The following table describes some common
occurrences that are not a result of defective
workmanship or materials.
Problem Possible Causes
The system does
The air conditioning unit circuit breaker is off.
not power up.
The display is not turned on.
The terminal strip is miswired.
The input-line voltage is insufficient.
An electrical component has failed.
The system runs
The unit is not able to reach the set point.
continuously.
The seawater temperature is too high for
cooling or too low for heating.
The optional inside air temperature sensor is
not located properly.
The de-icing feature is not enabled.
There is a lack of
The airflow is blocked or restricted.
airflow.
The fan speed is set to manual low.
The fan coil may be iced.
The fan coil is iced.
The humidity level is set too high.
The supply air is short-cycling.
The airflow is blocked or restricted
The fan runs too slow.
The system runs continuously.
The condenser coil
The seawater temperature is below 40 °F
is iced while in heat
(4 °C).
mode.
EN
Recommended Solution
Turn on the air conditioning unit circuit breaker at the ship's panel.
Turn on the display.
Check the wiring diagram and correct if necessary.
• Check the power source (shore/generator) for proper voltage.
• Check the wiring and terminals for proper sizes and connections.
• Verify with a voltmeter that the power at the unit is the same as the
power source.
A technician should inspect the display, cable, and circuit board. Look for
a red light on the circuit board.
Close all the port holes and hatches. Adjust the set point so it is not too
low for cooling or too high for heating.
Seawater temperature will directly affect the air conditioning unit's
efficiency. This air conditioning unit can effectively cool your boat in water
temperatures up to 90 °F (32 °C) and heat (if reverse-cycle option is
installed) in water as low as 40 °F (4 °C).
• Verify the display location with the criteria found in the installation
section of this manual.
• Install an optional inside air temperature sensor if necessary. If an
optional inside air temperature sensor is already installed in the air
stream, ensure it does not touch anything warm (like the condenser
coil).
Enable de-icing in the parameters. If ice still forms immediately, revisit the
above possible causes.
I
Ice on a fan coil can be removed quickly by running the unit in heat
mode.
• Remove any obstructions in the return-air stream.
• Clean the return-air filter and grille.
• Check for crushed or restricted ducting. Ducting must be as straight,
smooth, and taut as possible.
• If the fan speed is set to manual low, raise the speed to a higher setting
or set to automatic mode.
• Or, increase the minimum low speed in the program parameters.
Refer to "The fan coil is iced" in this table.
Close the hatches and doors.
• Redirect the supply air so that is not blowing in or near the return-air
stream.
• Seal any air leaks on the duct.
Refer to "There is a lack of airflow" in this table.
Set the fan speed to automatic mode or increase the manual fan speed.
Or, increase the minimum low speed in the program parameters.
Close hatches and doors, raise set point, turn on de-icing.
• Shut down the system to prevent damage to the condenser.
• Allow the coil to defrost.
Troubleshooting
35