Introduction

Roof Unit CK36H401RIY is a powerful and efficient cooling solution designed specifically for recreational vehicles. This rooftop air conditioner features advanced inverter technology, providing quiet operation and energy efficiency while delivering consistent cooling performance. With a sleek design that minimizes space usage, it easily integrates into your RV's roof. The unit operates effectively in a wide temperature range, ensuring comfort during your travels. Priced at $1,299, the CK36H401RIY is an essential addition for any RV owner looking to enhance their travel experience.

Specifications

Scope of delivery

Rooftop unit

Intended use

• The Dometic Harrier Inverter roof air conditioner can condition the interior of campers and caravans with cool or warm dehumidified air.
• The roof air conditioner is not suitable for installation in construction machines, agri-cultural machines or similar equipment. It will not work properly if exposed to strong vibrations.
• Do not operate the roof air conditioner if the ambient temperature is above 52 °C (at extreme temperatures the performance will be affected).

Technical description

The roof air conditioner supplies the interior with cool or warm dehumidified air with-out dust and dirt. LED lamps integrated in the air outlet unit provide pleasant lighting. The roof air conditioner is operated with the remote control.

NOTE 

• The roof air conditioner can lower the temperature within the vehicle to a certain level. The temperature depends on the type of vehicle, the ambient temperature and the cooling capacity of your roof air conditioner.
• Below an outside temperature of 16 °C the roof air conditioner doesn’t cool anymore.

Components

The refrigerant circuit of the roof air conditioner consists of the following main components:

• Compressor (1)
  The compressor draws in the refrigerant used and compresses it. This raises the pressure and therefore the temperature of the refrigerant. 

• Condenser (2)
  The built-in liquefier works like a cooler or heat exchanger. The air flowing past absorbs the heat and the hot refrigerant gas cools down and becomes liquid.

• Evaporator (3)
  The evaporators cool down and dehumidify the air flowing past them. The refrigerant absorbs the heat and vaporises.

• Blower (4)
  A blower distributes the cooled air within the vehicle through an air outlet unit.

Roof Unit CK36H401RIY Control panel

The control panel is at the air outlet unit of the roof air conditioner.

It contains the following control and display elements:

No.	ICONS	Explanation
1	Button	Switches the roof air conditioner on, off, or to stand-by mode. With status indicator: Off: The roof air conditioning is switched off (no mains power). Red light: The roof air conditioner is in stand-by mode. White light: The roof air conditioning is switched on.
2	Button	Switches the fan level to: LOW, MED, HIGH, AUTO
3	Display	Fan, Mode, Timer, Oscillation, Temperature setting, °C or °F
4	Button +	Increases the temperature setting
5	Button	Switches the front oscillation vent On/Off.
6	Button	Switches the rear oscillation vent On/Off.
7	Button –	Reduces the temperature setting
8	Infrared receiver	For the remote control
9	Button	Switches the light on or off.
10	Button M	Switches the mode to: COOL, HEAT, DEHUMIDIFICATION, VENTILATION, AUTO

Remote control

All settings of the device (e. g. temperature settings, timer programming) are transmitted to the roof air conditioner by remote control.

The following control and display elements are available on the remote control:

No.	ICONS	Explanation
1	Display	Displays the following: • Timer • Set temperature (target value) in °C or °F • Mode • Fan level • Symbols for active additional functions
2	Button	Switches the roof air conditioner and remote control on or to stand-by mode
3	Button M	Switches the mode to: COOL, HEAT, DEHUMIDIFICATION, VENTILATION, AUTO
4	Button +	Increases the value being set
5	Button	Activates the sleep function. The sleep function automatically modifies the fan speed to reduce noise.
6	Button –	Reduces the value being set
7	Button	Sets the timer function
8	Button	Turns the air purifier function On/Off.
9	Button	Switches the rear oscillation vent On/Off.
10	Button	Switches the front oscillation vent On/Off.
11	Button °F/°C	If temperature is displayed: switches between temperature units Celsius (°C) and Fahrenheit (°F)
12	Button	Switches the light of the roof air conditioner on or off.
13	Button	Switches the fan level to: LOW, MED, HIGH, AUTO

Air conditioning modes

The roof air conditioner has the following air conditioning modes:

Mode	Display Message	Explanation
Automatic		The air conditioner automatically maintains the temperature between 20 °C and 25 °C by heating or cooling as needed.
Cooling		You specify the temperature and blower settings, and the roof air conditioner cools the interior to this temperature.
Heating		You specify the temperature and blower settings, and the roof air conditioner heats the interior to this temperature.
Ventilation		The fan operates to circulate air without heating or cooling.
Dehumidification		Dehumidification removes moisture from the air without heating or cooling the inside. The fan speed is set to Low.

Additional functions

The roof air conditioner has the following additional functions:

Function	Display Message	Explanation
Timer		The roof air conditioner is switched on at the specified time between 0.5 to 24 hours in the future.
		The roof air conditioner is switched off at the specified time between 0.5 to 24 hours in the future.
Sleep		The sleep function reduces the fan speed and the compressor speed to reduce the noise levels for easier sleeping.

Before initial use

Inspection before starting up
Before you switch on the roof air conditioner, observe the following:

• Check whether the supply voltage and frequency correspond to the values specified in the technical data (page 27).
• Ensure both the air intake opening and the air nozzles are free. All ventilation grilles must always be kept free to ensure that the roof air conditioner is able to operate at maximum capacity.

CAUTION! Beware of injury
Do not insert your fingers or objects into the air nozzles or the intake grille.

Check remote control and insert batteries

Insert the provided batteries in the remote control battery compartment (chapter “Replacing the remote control batteries” on page 20).

Operating the roof air conditioner

Basic notes on operation

The roof air conditioner has three operating modes:

You can use the control panel to

• switch the roof air conditioner on or to stand-by mode
• switch the light on and off
• make adjustments to the settings

You can use the remote control to

• switch the roof air conditioner on or to stand-by mode
• switch the light on and off
• make adjustments to the settings
• select additional functions

Using the remote control

The values are directly transmitted to the roof air conditioner when you set them. The remote control must be pointed at the IR receiver on the control panel during operation.

When a button is pressed, the value is transmitted directly to the roof air conditioner. The roof air conditioner confirms the receipt of data with a beep.

Hint for improved use

The following hints will optimize the performance of your roof air conditioner:

• Improve the heat insulation of your vehicle by sealing gaps and hanging reflective blinds or curtains on your windows.
• If the vehicle has been subjected to direct sunlight for a long time and the outside temperature is lower than the inside temperature: Operate the roof air conditioner in the “Ventilation” () mode with the windows open for a while before switching on the “Cooling” () air conditioning mode.
• Avoid opening doors and windows as far as possible in the “Cooling” ()mode.
• Select an appropriate temperature and blower speed or use the Automatic blower fan setting.
• Make sure the air nozzles and intake grille are not covered by cloths, paper or other objects.

Selecting the air conditioning mode

Select the air conditioning mode of your choice using the M key.

• The roof air conditioner confirms the receipt of the values with a beep.
• The roof air conditioner is switched to the selected air conditioning mode.

Selecting the blower setting manually

The blower controls the strength of the air supply.

Display Message	Explanation
Low blower level
Medium blower level
High blower level	Boost (to quickly bring the temperature in the RV to the setting, bars cycling)
Automatic	Blower level changes automatically based on temperature conditions.

Use the button to select the desired blower level.

• The roof air conditioner confirms the receipt of the values with a beep.
• The new blower level has been set.

Setting the temperature

Cooling Mode

In the “Cooling” () and “Dehumidifying” () modes you can specify a temperature between 16 °C and 30 °C via the remote control.

Use the + or – button to select the desired temperature.

• The roof air conditioner confirms the receipt of the values with a beep.
• The temperature is set on the roof air conditioner.

Heating Mode

In the “Heating” () mode you can specify a temperature between 16 °C and 30 °C via the remote control.

Use the + or – button to select the desired temperature.

• The roof air conditioner confirms the receipt of the values with a beep.
• The temperature is set on the roof air conditioner.

Adjusting the air nozzles

The air supply within the vehicle can be regulated by setting the air nozzles.

Press the button and/or the button to start oscillation of each door. Pressing again will fix the door at the current angle. When the roof air conditioner is turned off, the doors return to the closed position. If the doors become misaligned they will return to the default position when the unit is turned off. Also, they can be rotated safely by hand without damaging the motors.

Setting the timer

The timer function allows you to set a specific time period for air conditioning. You can specify the switch-on time and the switch-off time. The time can be set in 0.5 hour increments.

NOTE
The remote control returns to its initial mode if no button is pressed on the remote control for 15 seconds while programming the timer.

Before programming the timer, select the air conditioning mode and all required values (e.g. temperature).

NOTE
The ON timer can only be set when the unit is turned OFF.

Cancelling the timer settings
If you have set the timer, you can cancel these settings as follows:

• Press the TIMER button once.
  • The timer symbol disappears.
  • The setting has been cancelled.

Setting the on and off times

• Press the TIMER button once.
  • The ON symbol () flashes on the display of the remote control.
• Use the + or – button to set the time when the roof air conditioner is to switch on.
• Press the TIMER button to transmit the value to the roof air conditioner.
  • The OFF symbol () flashes on the display of the remote control.
• Use the + or – button to set the time when the roof air conditioner is to switch off.
• Press the TIMER button to transmit the value to the roof air conditioner.
  • The on and off times are set on the roof air conditioner.

The roof air conditioner runs in the selected air conditioning mode during the specified time.

Activating the sleep function

NOTE
The sleep function is only available in “Cooling” () or “Heating” () modes.

When the sleep function is activated, the inside and outside fan speeds are set to low to reduce noise.

• Set the required temperature (chapter “Setting the temperature” on page 16) and mode.
• Press the SLEEP button.
  • The symbol appears in the display.
    The sleep function is activated.
• To deactivate the sleep function press the SLEEP button again.

NOTE
The sleep function is deactivated if the M button is pressed.

Operating the lights

Switching the light on/off with the control panel

• Briefly press the button to switch the lamps on or off.

Switching the light on/off with the remote control

• Press the button to switch the lamps on or off.

Replacing the remote control batteries

Replace the batteries if you notice the range of the remote control reduced.

NOTE: The display of the remote control will still be bright even if the batteries are running low.

The battery compartment is on the back of the remote control.

• Gently lift the lid of the battery compartment via the clip and remove it.
• Insert the new batteries (2 x type AAA) in the remote control as indicated in the battery compartment.
• Close the cover of the battery compartment.

Setup Guide

To set up the Dometic Air Conditioning Roof Unit CK36H401RIY, follow these steps:

1. Ensure the roof of your RV is clear of any obstructions and has a suitable mounting location.
2. Install the roof opening kit according to the manufacturer's instructions.
3. Mount the air conditioning unit securely to the roof using the provided hardware.
4. Connect the electrical connections as specified in the user manual.
5. Test the unit to ensure proper operation and adjust settings as needed.

Cleaning the roof air conditioner

NOTICE! Beware of damage

• Do not clean the roof air conditioner with a high-pressure cleaner. Exposure to water can damage the air conditioner.
• Do not use sharp or hard objects or cleaning agents for cleaning as these may damage the roof air conditioner.
• To clean the roof air conditioner, use water with a gentle cleaning agent. Never use petrol, diesel or solvents.

1. Clean the housing of the roof air conditioner and the air outlet unit occasionally with a damp cloth.

2. Regularly remove leaves and other dirt from the ventilation grilles (1) of the roof air conditioner. Make sure you do not damage the grilles in the process.

   

3. Clean the remote control with a slightly damp cloth from time to time. We recommend using a cleaning cloth for glasses to clean the display.

Maintenance of the roof air conditioner

WARNING!
Any other maintenance work to that which is described here may only be carried out by qualified personnel who are familiar with the risks involved when handling refrigerant and air conditioning systems as well as the relevant regulations.

Interval	Inspection/Maintenance
Regularly	Check the condensation water drainage:
	➤ Check whether the condensation water drainage channels (1) at the sides of the roof air conditioner are clear and the condensation water is able to escape.
	Clean the filter of the air discharge unit:
	➤ Remove the filter (1).
	➤ Clean the filter (1) with a detergent solution and let it dry.
	➤ Put the dry filter (1) back in.
Once per year	Check the profile seals:
	➤ Check the seal between the roof air conditioner and the roof of the vehicle for cracks and other damage.
	Have the heat exchanger serviced:
	➤ Have the heat exchanger of the roof air conditioner serviced by a specialist workshop.
	Check the fastening bolt tightness:
	➤ Check the fastening bolts are tightened to the correct torque and adjust if necessary.

Troubleshooting

Warranty

The statutory warranty period applies. If the product is defective, please contact the service partner in your country (addresses on the back on the instruction manual).

Dometic Air Conditioning Roof Unit CK36H401RIY Pros & Cons

Pros:

• High Cooling Capacity: Efficiently cools large spaces.
• Durable Construction: Built to last with rust-resistant materials.
• Ease of Installation: Designed for easy setup on most RVs.
• Low Noise Operation: Quiet running for undisturbed sleep.
• Precision Temperature Control: Digital thermostat for accurate temperature settings.

Cons:

• High Power Consumption: May increase your energy costs.
• Weight and Size: Requires a sturdy roof and careful installation.
• Costly Replacement Parts: Spare parts can be expensive if needed.
• Complex Maintenance: Regular maintenance is necessary but can be time-consuming.

Customer Reviews

Customers have generally praised the Dometic Air Conditioning Roof Unit CK36H401RIY for its powerful cooling performance and durability. However, some users have noted that the installation process can be complex and time-consuming.

Common complaints include the high power consumption and the need for regular maintenance to keep the unit running efficiently.