Dometic FreshJet 4 Series User manual

CLIMATE CONTROL
FJX
Dometic FreshJet Series 4, FreshJet Series 7
EN Roof Air Conditioner
Operating manual..........................................3

Copyright
© 2023 Dometic Group. The visual appearance of the contents of this manual is protected by copyright and design
law. The underlying technical design and the products contained herein may be protected by design, patent or be
patent pending. The trademarks mentioned in this manual belong to Dometic Sweden AB. All rights are reserved.

Dometic FreshJet Series 4, FreshJet Series 7 EN
English
1Important notes..............................................................................................................................3
2Explanation of symbols....................................................................................................................3
3Safety instructions...........................................................................................................................4
4Intended use..................................................................................................................................5
5Explanations of symbols on the appliance.......................................................................................... 5
6Technical limits and conditions..........................................................................................................6
7Technical description.......................................................................................................................6
8Before initial use............................................................................................................................ 11
9Operation.....................................................................................................................................11
10 Cleaning the roof air conditioner..................................................................................................... 17
11 Maintenance.................................................................................................................................18
12 Troubleshooting............................................................................................................................19
13 Disposal...................................................................................................................................... 22
14 Warranty......................................................................................................................................22
15 Technical data.............................................................................................................................. 23
1 Important notes
Please read these instructions carefully and follow all instructions, guidelines, and warnings included in this product manual in order to ensure that you install, use, and maintain
the product properly at all times. These instructions MUST stay with this product.
By using the product, you hereby confirm that you have read all instructions, guidelines, and warnings carefully and that you understand and agree to abide by the terms and
conditions as set forth herein. You agree to use this product only for the intended purpose and application and in accordance with the instructions, guidelines, and warnings as
set forth in this product manual as well as in accordance with all applicable laws and regulations. A failure to read and follow the instructions and warnings set forth herein may
result in an injury to yourself and others, damage to your product or damage to other property in the vicinity. This product manual, including the instructions, guidelines, and
warnings, and related documentation, may be subject to changes and updates. For up-to-date product information, please visit documents.dometic.com.
2 Explanation of symbols
DANGER!
Indicates a hazardous situation that, if not avoided, will result in death or serious injury.
WARNING!
Indicates a hazardous situation that, if not avoided, will result in death or serious injury.
CAUTION!
Indicates a hazardous situation that, if not avoided, could result in minor or moderate injury.
NOTICE!
Indicates a hazardous situation that, if not avoided, could result in minor or moderate injury.
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EN Dometic FreshJet Series 4, FreshJet Series 7
Note Supplementary information for operating the product.
3 Safety instructions
WARNING! Failure to obey these warnings could result in death or serious injury.
•Electrical appliances are not toys. The appliance is not to be used by persons (including chil-
dren) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge,
unless they are under supervision or have been given instruction.
•Children should be supervised to ensure that they do not play with the appliance.
•Cleaning shall not be performed by children without supervision.
•Any person who is involved with working on or breaking into a refrigerant circuit should hold a cur-
rent valid certificate from an industry-accredited assessment authority, which authorises their com-
petence to handle refrigerants safely in accordance with an industry recognised assessment specifi-
cation.
•Maintenance shall only be performed as recommended by the equipment manufacturer. Mainte-
nance and repair requiring the assistance of other qualified personnel shall be carried out under the
supervision of the person competent in the use of flammable refrigerants.
•Repair of the appliance may only be carried out by qualified personnel who are familiar with the risks
involved and the relevant regulations. Inadequate repairs may cause serious hazards. For repair ser-
vice, contact the service center in your country (see dometic.com/dealer).
•Always disconnect the power supply when working on the appliance.
•The appliance shall be stored in a room without continuously operating ignition sources such as
open flames, an operating gas appliance or an operating electric heater.
•Do not pierce or burn the appliance.
•Be aware that refrigerants may not contain an odor.
•Do not use the appliance near flammable fluids or in closed rooms.
•Ensure that no combustible objects are stored or installed near the air outlet. A distance of at least
50 cm must be kept.
•Keep the ventilation openings clear of obstruction.
•Do not damage the refrigerant circuit.
•Under no circumstances shall potential sources of ignition be used in the searching for or detection
of refrigerant leaks. A halide torch (or any other detector using a naked flame) shall not be used.
•The roof air conditioner shall be installed in a vehicle with a floor area larger than 4 m².
CAUTION! Failure to obey these cautions could result in minor or moderate injury.
•Do not reach into air outlets or insert any foreign objects in the appliance.
•Do not undo the upper cover of the appliance in the event of a fire. Use approved extinguishing
agents instead. Do not use water to extinguish fires.
•If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly
qualified personnel in order to avoid a hazard.
•In case that the appliance contains an ionizer, consult your physician if you have a medical condi-
tion. The ionizer can produce ozone (O3) in small quantities. If you suffer from lung disease, asthma,
heart disease, respiratory disease, respiratory problems, or have an ozone sensitivity, consult your
physician to determine whether the use of this device is safe for you.
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Dometic FreshJet Series 4, FreshJet Series 7 EN
NOTICE! Damage hazard
•Do not use means to accelerate the defrosting process or to clean, other than those recommended
by the manufacturer.
•The appliance shall be stored so as to prevent mechanical damage from occurring.
•Do not make any alterations or conversions to the appliance.
•Never drive through automatic car washes when the appliance is mounted.
•If faults occur in the refrigerant circuit, the appliance must be checked and repaired by the manufac-
turer, its service agent or similarly qualified personnel in order to avoid a hazard.
4 Intended use
The roof air conditioner is only designed for installation on the roof of a caravan or recreational vehicle to provide
cooling and heating.
The roof air conditioner is not suitable for trains, houses and apartments. The roof air conditioner is not suitable for
installation in construction machines, agricultural machines or similar equipment.
This product is only suitable for the intended purpose and application in accordance with these instructions.
This manual provides information that is necessary for proper installation and/or operation of the product. Poor in-
stallation and/or improper operating or maintenance will result in unsatisfactory performance and a possible failure.
The manufacturer accepts no liability for any injury or damage to the product resulting from:
•Incorrect assembly or connection, including excess voltage
•Incorrect maintenance or use of spare parts other than original spare parts provided by the manufacturer
•Alterations to the product without express permission from the manufacturer
•Use for purposes other than those described in this manual
Dometic reserves the right to change product appearance and product specifications.
5 Explanations of symbols on the appliance
Warning! Low burning velocity material.
Read operating manual.
Read service manual.
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EN Dometic FreshJet Series 4, FreshJet Series 7
6 Technical limits and conditions
The roof air conditioner is intended for vehicles with roofs with a thickness of 25 mm… 60 mm. The roof top air con-
ditioner will operate ambient temperatures between -2 °C… 52 °C. The roof air conditioner is designed to be in-
stalled within ± 10 ° of the horizontal plane.
7 Technical description
The roof air conditioner supplies the vehicle's interior with cool or warm air which is without dust and dirt and can be
dehumidified.
The roof air conditioner can lower the temperature within the vehicle to a certain level that depends on the type of
vehicle, the ambient temperature and the cooling capacity of the roof air conditioner. Below an outer temperature of
16 °C the roof air conditioner does not cool anymore.
The roof air conditioner is operated with the following operating elements:
•Control panel
•Remote control (only some models, see List of models on page6)

1
FreshJet FJX4333EEH/FJX7337IHP/FJX7457IHP
7.1 List of models
The models are differentiated between fixed-speed and inverter models.
•FreshJet 4-Series: Fixed-speed
•FreshJet 7-Series: Inverter
The following table shows which function applies to a specific model:
Feature is available
Feature is upgradable
FJX4333EEH FJX7337IHP FJX7457IHP
Automatic
Cooling
Heating
Ventilation
Dehumification
Air purifier
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Dometic FreshJet Series 4, FreshJet Series 7 EN
FJX4333EEH FJX7337IHP FJX7457IHP
ADB light
External light
Timer
Sleep
So start
Inverter
7.2 Control panel

Symbol Description
Switches the roof air conditioner on or to standby mode.
Increases the currently displayed value.
Reduces the currently displayed value.
Pairs with bluetooth/WLAN when both buttons are pressed simultaneously.
Switches the ambient lights in the roof top unit on or off.
Switches the ambient lights in the air distribution box on or off.
Activates the sleep function (only for models with sleep function).
Displays the set temperature and indicates fan level when fan is adjusted.
Indicates the AirPurifier mode is active.
Indicates the temperature is displayed in degrees Celsius.
Indicates the timer is set.
AUTO
Enables/disables the automatic mode (only for models with automatic mode).
Enables/disables the cooling mode (only for models with cooling mode).
Enables/disables the heating mode (only for models with heating mode).
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EN Dometic FreshJet Series 4, FreshJet Series 7
Symbol Description
Adjusts the fan speed between Low, Med, High, Turbo or Auto (shown as 1, 2, 3, 4 or AA on the air distribution
box display for a short time when changed).
Enables/disables ventilation mode (only for models with ventilation mode). Circulates air without heating or
cooling.
Enables/disables dehumidification mode (only for models with dehumidification mode).
7.3 Remote control

Control and display elements fig. on page8:
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Dometic FreshJet Series 4, FreshJet Series 7 EN
Button Description
—Display
Displays the following:
•Time
•Selected room temperature (target value) in °C
•Actual room temperature
•Air conditioning mode
•Fan speed
•Symbols for active additional functions
•Battery status
Switches the roof air conditioner on or to stand-by mode.
Increases the currently displayed value.
Reduces the currently displayed value.
Selects the fan speed (Selecting the fan speed manually on page12).
Selects the air conditioning mode (only for models with automatic mode). The corresponding symbol is dis-
played.
Activates the sleep function (only for models with sleep mode). The symbol is displayed.
Confirms and saves settings.
Sets the timer and the clock.
Switches the ambient lights in the air distribution box on or off.
Press once to display the current interior temperature. The symbol is displayed.
Press twice to display the set temperature.
Activates the I feel function. The symbol is displayed.
Every 10 min the I feel function adjusts the target temperature to the actual temperature measured by the re-
mote control.
Switches the ambient lights in the roof top unit on or off.
Displays that the remote control's batteries are empty. Replace the batteries (Replacing the remote control bat
teries on page15).
Displays that the remote control is transmitting values to the roof air conditioner.
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EN Dometic FreshJet Series 4, FreshJet Series 7
7.4 Air conditioning modes
Air conditioning
mode
Displayed
symbol
Description
Automatic You specify the temperature, and the roof air conditioner brings the interior to this
temperature by heating or cooling and by controlling the necessary fan speed.
Cooling You specify the temperature and fan settings, and the roof air conditioner cools the
interior to this temperature.
Heating You specify the temperature and fan settings, and the roof air conditioner heats the
interior to this temperature. The fan will only start after 2 min (on Low speed) and
then after around 5 min will go to the set fan speed (after the evaporator reaches
temperature).
Ventilation You specify the fan settings, and the roof air conditioner circulates air without heat-
ing or cooling.
Dehumidifying The roof air conditioner removes moisture from the air without heating or cooling
the interior thus decreasing the relative air humidity.
Air purifier The roof air conditioner ionizes the air, thus collecting dust and particles including to
viruses and bacteria out of the air.
7.5 Additional functions
Additional func-
tion
Display message Description
The roof air conditioner is switched on at the specified time.
The roof air conditioner is switched off at the specified time.
Timer
The roof air conditioner is switched on and off at the specified times.
Sleep The sleep function reduces the fan speed and the compressor speed to
reduce the noise levels for comfortable sleeping.
I Feel The remote control measures the room temperature and transmits this
measurement to the roof air conditioner every 10 min. The roof air condi-
tioner adapts the target value to this measurement.
So start The peak current that the compressor start produces is reduced by the
so start function. If a generator is used as power supply, the generator
will not be overloaded.
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Dometic FreshJet Series 4, FreshJet Series 7 EN
8 Before initial use
Inspection before starting up
Before switching on the roof air conditioner, observe the following:
1. Check whether the supply voltage and frequency correspond to the values specified in Technical data on
page23.
2. Ensure that both the air intake openings 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.
Prepare the remote control
3. Insert the batteries (Replacing the remote control batteries on page15).
Set the time
4. Set the current time (Setting the current time on page13).
9 Operation
9.1 Hints 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.
•Select an appropriate temperature and fan speed.
•Align the air nozzles sensibly.
•Ensure that the air nozzles and air intake openings are not covered by cloths, paper or other objects.
•If the vehicle has been subjected to direct sunlight for a long time: Operate the roof air conditioner in the Ven-
tilation ( ) mode with the windows open for a while before switching on the Cooling ( ) mode.
•Avoid opening doors and windows as far as possible in the Cooling ( ) mode.
9.2 Basic notes on operation
The FreshJet FJX4333EEH/FJX7337IHP/FJX7457IHP roof air conditioner has two operating modes:
Operating mode Description
Standby The roof air conditioner is ready for operation and can be switched on with the remote control.
The ambient lights are available. The remote control is also in standby, but you can switch the
remote control on independently from the roof air conditioner.
On The roof air conditioner is conditioning the air in the interior.
9.3 Fixed-speed and inverter models
The given information in this chapter applies to fixed-speed and inverter models.
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EN Dometic FreshJet Series 4, FreshJet Series 7
9.3.1 Using the remote control
Consider the following hints when using the remote control:
•Point the remote control at the IR receiver of the control panel.
•The corresponding settings and values are directly transmitted to the roof air conditioner when you press a
button.
•The roof air conditioner confirms the receipt of data with a beep sound.
•Values increase or decrease faster when you press and hold the + or – button.
•In the standby mode, the remote control display is inactive too. You can switch the remote control on to stand-
by independently from the roof air conditioner.
To switch only the remote control to or from standby, press the button while not pointing to the control
panel's IR receiver.
9.3.2 Switching the roof air conditioner on and to standby
Note When the roof air conditioner is switched on, it operates with the values that were set before
switching to standby. The roof air conditioner can be switched off only by cutting the power supply.
Press the button on the remote control or the button on the control panel to switch the roof air condi-
tioner on or to standby.
9.3.3 Selecting the air conditioning mode
Select the desired air conditioning mode using the MODE button (Air conditioning modes on page10).
The roof air conditioner confirms the receipt of the values with a beep sound. The roof air conditioner is switched
to the selected air conditioning mode.
9.3.4 Selecting the fan speed manually
In all modes, except for the Automatic( ) and Dehumidifying ( ) modes, the fan speed can be selected manually.
Display message Description
Low fan level
Medium fan level
High fan level.
Turbo fan level.
Automatic mode (the fan speed is adjusted based on the ambient temperature).
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Dometic FreshJet Series 4, FreshJet Series 7 EN
Press the button of the remote control or the button of the control panel to select the desired fan
speed.
The roof air conditioner confirms the receipt of the values with a beep sound.
The new fan speed is set.
9.3.5 Setting the temperature
In the Automatic ( ), Cooling ( ), Heating ( ) and Dehumidifying ( ) modes, you can specify a temperature
between 16 °C and 31 °C.
Use the + or – button on the remote control to set the desired temperature.
The roof air conditioner confirms the receipt of the values with a high note. The temperature is set on the roof air
conditioner.
9.3.6 Setting the current time
The remote control needs the current time in order to program the timer. The time is shown on the remote control
display.
1. Press and hold the button in order to get into the mode for setting the time.
The time flashes on the remote control display.
2. Use the + or – button to set the current time. Press and hold the + or – button longer than 2 s to increase or de-
crease the time quicker.
3. Press the SET button to confirm the time.
9.3.7 Setting the timer
The timer function allows you to set a specific time period for air conditioning. You can specify the switch-on time,
the switch-to-standby time or both values.
The timer function is set via remote control.
Note The remote control returns to its initial mode if no button is pressed on the remote control for 15 s
while programming the timer.
Set the switch-on timer as follows:
a) Select the desired air conditioning mode and all required values (for example the temperature).
b) If necessary, switch the roof air conditioner to standby.
The switch-on timer can only be set when the roof air conditioner is in standby.
c) Press the button one time.
The symbol flashes on the remote control display.
d) Use the + or – button to set the time when the roof air conditioner shall be switched on.
e) Press the button.
The switch-on timer is set. The roof air conditioner will be switched on with the selected air
conditioning mode at the specified time.
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EN Dometic FreshJet Series 4, FreshJet Series 7
Set the switch-to-standby timer as follows:
a) If necessary, switch the roof air conditioner on.
The switch-to-standby timer can only be set when the roof air conditioner is switched on.
b) Press the button twice.
The symbol flashes on the remote control display.
c) Use the + or – button to set the time when the roof air conditioner shall be switched to standby.
d) Press the button.
The switch-to-standby timer is set. The roof air conditioner will be switched to standby at the specified time.
Set the switch-on timer and the switch-to-standby timer as follows:
a) Select the desired air conditioning mode and all required values (for example the temperature).
b) Press the button three times.
The symbol is shown on the remote control display. The ON symbol flashes.
c) Use the + or – button to set the time when the roof air conditioner shall be switched on.
d) Press the button.
The OFF symbol flashes.
e) Use the + or – button to set the time when the roof air conditioner shall be switched to standby.
f) Press the button.
The switch-on and switch-to-standby times are set. The roof air conditioner will be switched on for the specified
time period.
To cancel preset timer, press the button once.
The symbols disappear. Preset values are discarded.
9.3.8 Setting the sleep function
The sleep function is only available in Cooling ( ) or Heating ( ) modes.
The sleep function limits the fan speed to a lower level to reduce the noise levels for easier sleeping.
Only for inverter models: The sleep function additionally limits the compressor speed.
To activate the sleep function proceed as follows:
a) Set the required temperature (Setting the temperature on page13).
b) Press the button on the remote control or the button on the control panel.
The symbol appears in the remote control display. The sleep function is activated.
To deactivate the sleep function, press the or the button on the remote control or the button on the
control panel.
The symbol disappears in the remote control display. The sleep function is deactivated.
9.3.9 Activating the I feel function
When this function is active, the remote control measures the room temperature and transmits this measurement to
the roof air conditioner every 10 minutes. The roof air conditioner adapts the target value to this measurement. The I
feel function is only active when the temperature range is between +18 °C and +29 °C.
The remote control should not be kept in a part of the room that is considerably warmer or colder than the average
room temperature. It may not, for example, be le in the sun or in front of the roof air conditioner.
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Dometic FreshJet Series 4, FreshJet Series 7 EN
When the temperature rises above +29 °C or falls below +18 °C, the I feel function is deactivated. The symbol
flashes three times in the display and then turns off.
1. Press the button.
The I feel function is activated.
The symbol appears in the display.
2. Position the remote control so that it points at the IR receiver on the control panel. Otherwise, the values cannot
be transmitted to the roof air conditioner.
9.3.10 Operating the ambient lights
WARNING! Risk of injury
By law it is forbidden to use the external lights when driving the vehicle.
The button on the remote control is active even if the remote control is switched off.
Only for models with ADB light:
To switch the internal lights on or off press the button on the remote control or on the control panel.
The symbol flashes once in the display of the remote control when the internal lights are switched on.
To dim the internal lights proceed as follows:
a) Press the button on the remote control or on the control panel for 3 s.
b) When pressing the button on the remote control: Press the button to dim the internal light be-
tween 50 % and 100 %.
c) When pressing the button on the control panel: The internal light's brightness cycles between 50 % and
100 %. Release the button when the the desired brightness is reached.
Only for inverter models:
To switch the external lights on or off press the button on the control panel.
9.3.11 Replacing the remote control batteries
Note The remote control display may still be bright even if the batteries are running low. Replace the bat-
teries when the remote control indicates low batteries.
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EN Dometic FreshJet Series 4, FreshJet Series 7
Replace the batteries as shown.

2.
3.
1.
4.
5.
6.
2 × 1,5 V, AAA CLICK
The display shows all symbols for 5 s.
Protect the environment! Do not dispose of any batteries with general household waste. Return defective
or used batteries to your retailer or dispose of them at collection points.
9.4 Regulating air supply within the vehicle
The air flow can be adjusted along the ceiling or towards the floor.
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Dometic FreshJet Series 4, FreshJet Series 7 EN
Turn the slats in the air nozzles independently in the required directions.

B
A
10 Cleaning the roof air conditioner
NOTICE! Damage hazard
•Do not use means to accelerate the defrosting process or to clean, other than those recommended
by the manufacturer.
•Do not clean the roof air conditioner with a high-pressure cleaner. Exposure to water can damage
the roof air conditioner.
•Do not use sharp or hard objects or cleaning agents for cleaning as these may damage the roof air
conditioner.
•Do not use petrol, diesel or solvents.
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EN Dometic FreshJet Series 4, FreshJet Series 7
1. Regularly remove leaves and other dirt from the air intake and the ventilation grilles of the roof air conditioner.
Do not damage the ventilation grilles in the process.

1
2. Occasionally clean the housings of the roof top unit and the air distribution box with a damp cloth. Use only wa-
ter with a gentle cleaning agent.
3. Only for models with remote control: Occasionally clean the remote control with a slightly damp cloth.
Clean the display with a cleaning cloth for glasses.
4. Only for models with air distribution box: Occasionally clean the air distribution box display with a mild
solution of warm soapy water. The display screen is acrylic and can be damaged by some common household
chemicals such as chemical cleaners, window cleaners, alcohol, certain tensides, organic solvents, and soften-
ers.
11 Maintenance
WARNING! Risk of injury
Any other maintenance work in addition to the described subjects here may only be carried out by quali-
fied personnel who are familiar with the risks involved when handling refrigerant and air conditioning sys-
tems as well as the relevant regulations.
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Dometic FreshJet Series 4, FreshJet Series 7 EN
Interval Inspection/maintenance
Regulary Check whether the condensation water drainage channels (1) at the sides of the roof air condi-
tioner are clear and the condensation water is able to escape.

1
1
Regulary •Clean the filter of the air discharge unit.

2
1
1
2
1. Insert a flat screwdriver or knife into the handle (1) to pull the filters (2) slightly out.
2. Remove the filters by hand.
3. Clean the filters with a detergent solution and let them dry.
4. Slide the dry filters back in.fig. on page19
•Have the heat exchanger of the roof air conditioner serviced by specialist company.
Once per year •Check the seals between the roof air conditioner and the vehicle roof for cracks and other
damage.
•Check whether the fastening bolts are tightened to the correct torque (2.5 Nm
±0.3 Nm) and adjust if necessary.
12 Troubleshooting
Problem Possible cause Suggested remedy
Not cooling well The roof air conditioner is not set to
cooling. Set the roof air conditioner to cooling.
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EN Dometic FreshJet Series 4, FreshJet Series 7
Problem Possible cause Suggested remedy
The ambient temperature is above
52 °C. The roof air conditioner is only de-
signed for ambient temperatures of up
to 52 °C.
The temperature set is higher than the
room temperature. Select a lower temperature.
The ambient temperature is below
16 °C. The roof air conditioner is designed for
cooling only at ambient temperatures
above 16 °C.
One of the temperature sensors is de-
fective. Contact an authorized service agent or
Dometic.
The evaporator fan is damaged. Contact an authorized service agent or
Dometic.
The condenser fan is damaged. Contact an authorized service agent or
Dometic.
The roof air conditioner is not set to
heating. Set the roof air conditioner to heating.
The ambient temperature is below
-2 °C. The roof air conditioner is designed for
ambient temperatures above -2 °C.
The temperature set is lower than the
room temperature. Select a higher temperature.
One of the temperature sensors is de-
fective. Contact an authorized service agent or
Dometic.
Only for models with heating
mode: Not heating well
The evaporator fan is damaged. Contact an authorized service agent or
Dometic.
The air intake openings are blocked or
obstructed. Remove any leaves and other dirt from
the ventilation grilles of the roof air
conditioner.
Low Air output
The fan is defective. Contact an authorized service agent or
Dometic.
The condensation water drainage
openings are clogged up. Clean the water drainage openings
from condensation water.
Water enters the vehicle.
The seals are damaged. Contact an authorized service agent or
Dometic.
No power supply connected. Check the power supply.
The voltage is too low (< 200 V). Contact an authorized service agent or
Dometic.
The voltage converter is defective. Contact an authorized service agent or
Dometic.
One of the temperature sensors is de-
fective. Contact an authorized service agent or
Dometic.
The roof air conditioner does not
switch on.
The electrical fuse of the power supply
is too low. Contact an authorized service agent or
Dometic.
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