To Next PageTo Next PageHow to fix a Dometic Control Unit when the digital display panel is not lit?
If the digital display panel of your Dometic Control Unit is not lit, first turn the circuit breaker on. If that doesn't work, consider replacing it with a Q-Logic or U-Board. If necessary, replace the CXP or TSEP cables. As a last resort, replace the control, or the Q-Logic or U-Board.
How to troubleshoot a Dometic Control Unit that will not start?
If your Dometic Control Unit system will not start, try the following: turn the circuit breaker on at the ship’s panel, press the Power button, check the wiring diagram and correct if necessary, check the power source (shore/generator) for proper voltage, disconnect the power supply and open the electric box, check the wiring diagram, and correct if necessary.
What to do if my Dometic Control Unit runs continuously?
If your Dometic Control Unit is running continuously, try raising or lowering the set point and closing all port holes and hatches. You can also check your specific control troubleshooting section.
What to do if "Ar / FL" is flashing on my Dometic Control Unit?
If the Dometic Control Unit displays a flashing "Ar / FL" (Filter Reminder), you should clean or replace the filter. To reset the reminder and stop the flashing, simultaneously press the FAN, UP, and DOWN buttons.
Why is the temperature display erratic on my Dometic Control Unit?
If you're experiencing erratic temperature display on your Dometic Control Unit, try shutting the power to the unit off and then back on. If that doesn't resolve the issue, perform a Restore Factory Settings. Also, check the sensor cable and connections, ensure the temperature sensor is installed properly, calibrate the temperature, or replace the Q-Logic or U-Board.
How to increase airflow in a Dometic Control Unit?
To address low airflow in your Dometic Control Unit, remove any obstructions in the return-air stream, clean the return-air filter and grille, press and release the Fan button until the desired fan speed and airflow are reached, or press and release the Fan button until the letter “A” displays.
Why is my Dometic Control Unit not cooling or heating?
If your Dometic Control Unit has no cooling or heating, try lowering or raising the set point, setting the system for Cool Mode or Heat Mode, and checking the loop inlet water temperature at the digital control by pressing the Up and Power buttons simultaneously while in the On mode. You can also check your specific control troubleshooting section.
What causes erratic system operation in a Dometic Control Unit?
If your Dometic Control Unit is showing erratic system operation, try shutting the power to the unit off and back on. Also, check the CXP cable and connections, check the temperature sensor, cable, and connections. If problems persist, replace the control, or replace the Q-Logic or U-Board.
General| Brand | Dometic |
|---|---|
| Model | Q3 |
| Category | Control Unit |
| Language | English |
Essential information and an overview of Q3 and Qht controls for proper operation and future reference.
Lists features and explains basic operating principle and power handling of the air conditioning system.
Explains Qht control panel layout, button operations, and how to display system information.
Instructions for installing the Q3 and Qht display panels.
Guidelines for installing ambient and loop inlet temperature sensors.
Explains panel layout, button functions, and how to display system information.
Details power on, basic, dehumidification, set point, fan control, and memory.
Step-by-step guide to enter and navigate the programming mode.
Adjusting display brightness, sleep mode, and lockout display mode.
Overview of programmable functions and how to customize them.
Instructions for restoring original factory default settings.
Summary of fault codes, their descriptions, and results.
Common problems and solutions for general system operation.
Procedures for maintaining condensate drains and the return-air filter.
Technical specifications, dimensions, cable lengths, and system inputs.
