Rohnson R-9424 User manual

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Home Dehumidifier
User Manual
Original instructions
R-9424
(With R290 refrigerant)

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CONTENT
1. BEFORE YOU BEGIN...................................................................................................................................................... 3
1.1 PRODUCT DESCRIPTION ................................................................................................................................... 3
1.2SYMBOLS FROM THE UNIT AND USER MANUAL............................................................................................. 3
2. FOR YOUR SAFETY ........................................................................................................................................................ 5
2.1 OPERATIONALPRECAUTIONS........................................................................................................................ 5
2.2 SAFETY PRECAUTIONS ON SERVICING .......................................................................................................... 7
2.2.1 Checks to the area.................................................................................................................................. 7
2.2.2 Work procedure ...................................................................................................................................... 7
2.2.3 General work area .................................................................................................................................. 7
2.2.4 Checking for presence of refrigerant ................................................................................................... 7
2.2.5 Presence of fire extinguisher................................................................................................................. 7
2.2.6 No ignition sources ................................................................................................................................. 7
2.2.7 Ventilated area ........................................................................................................................................ 7
2.2.8 Checks to the refrigeration equipment ................................................................................................ 7
2.2.9 Checks to electrical devices................................................................................................................... 8
3. INSTALLATION............................................................................................................................................................... 9
3.1 LOCATION............................................................................................................................................................ 9
3.2 OPERATING THE DEVICE SAFELY .................................................................................................................. 10
4. PRODUCT OVERVIEW ................................................................................................................................................. 11
4.1 FRONT VIEW ..................................................................................................................................................... 11
4.2 FEATURES .......................................................................................................................................................... 12
4.3 SPECIFICATIONS .............................................................................................................................................. 12
5. OPERATION .................................................................................................................................................................. 13
5.2 SETTINGS........................................................................................................................................................... 14
5.3 SETTINGS INDICATOR LIGHT ........................................................................................................................ 15
6. ANNOUNCEMENTS....................................................................................................................................................... 16
7. MAINTENANCE ............................................................................................................................................................. 17

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8. TROUBLESHOOTING ................................................................................................................................................... 18
9. SAFETY WARNING....................................................................................................................................................... 19

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1. BEFORE YOU BEGIN
1.1 PRODUCT DESCRIPTION
The dehumidifier is used to remove excessive moisture from the air. The resulting reduction
in relative humidity protects buildings and their contents from the adverse effects of excess
humidity.
The environmentally friendly R290 is used as the refrigerant. R290 has no damaging
influence on the ozone layer (ODP), a negligible greenhouse effect (GWP) and is available
worldwide. Because of its efficient energy properties, R290 is highly suitable as a coolant
for this application. Special precautions must be taken into consideration due to the
coolant's high flammability.
1.2SYMBOLS FROM THE UNIT AND USER MANUAL
warning
This unit uses a flammable refrigerant.
If refrigerant leaks and comes in contact with fire or heating part, it
will create harmful gas and there is risk of fire.
Read the USER MANUAL carefully before operation.
Further information is available in the USER MANUAL, SERVICE
MANUAL, and the like.
Service personnel are required to carefully read the USER MANUAL
and SERVICE MANUAL before operation.

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THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY
⚫This appliance is intended to be used by expert or trained users in shops, in light
industry and on farms, or for commercial use by lay persons.
⚫This appliance can be used by children aged from 8 years and above and persons
with reduced physical, sensory or mental capabilities or lack of experience and
knowledge if they have been given supervision or instruction concerning use of the
appliance in a safe way and understand the hazards involved. Children shall not play
with the appliance. Cleaning and user maintenance shall not be made by children
without supervision.
⚫The unit is designed only for use with R-290(propane) gas as the designated
refrigerant.
⚫The refrigerant loop is sealed. Only a qualified technician should attempt to
service!
⚫Do not discharge the refrigerant into the atmosphere.
⚫R-290 (propane) is flammable and heavier than air.
⚫It collects first in low areas but can be circulated by the fans.
⚫If propane gas is present or even suspected, do not allow untrained personnel to
attempt to find the cause.
⚫The propane gas used in the unit has no odor.
⚫The lack of smell does not indicate a lack of escaped gas.
⚫If a leak is detected, immediately evacuate all persons from the store, ventilate the
room and contact the local fire department to advise them that a propane leak has
occurred.
⚫Do not let any persons back into the store until the qualified service technician has
arrived and that technician advises that it is safe to return to the store.
⚫No open flames, cigarettes or other possible sources of ignition should be used inside

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or in the vicinity of the units.
⚫Component parts are designed for propane and non-incentive and non-sparking.
Component parts shall only be replaced with identical repair parts.
FAILURE TO ABIDE BY THIS WARNING COULDRESULT IN AN EXPLOSION, DEATH,
INJURY ANDPROPERTY DAMAGE.

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2. FOR YOUR SAFETY
Your safety is the most important thing we concerned!
2.1 OPERATIONALPRECAUTIONS
WARNING- to reduce the risk of fire, electric shock or injury to persons or property:
◼If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or
similarly qualified persons in order to avoid a hazard.
◼The A-weighted sound pressure level is below 42 dB.
◼The appliance shall be disconnected from its power source during maintenance.
◼Always operate the unit from a power source of equal voltage, frequency and rating as
indicated on the product identification plate.
◼Always use a power outlet that is grounded.
◼Unplug the power cord when cleaning or when not in use.
◼Do not operate with wet hands. Prevent water from spilling onto the unit.
◼Do not immerse or expose the unit to rain, moisture or any other liquid.
◼Do not leave the unit running unattended. Do not tilt or turn over the unit.
◼Do not unplug while the unit is operating.
◼Do not unplug by pulling on the power cord.
◼Do not use an extension cord or an adapter plug.
◼Do not put objects on the unit.
◼Do not climb or sit on the unit.
◼Do not insert fingers or other objects into the air outlet.
◼Do not touch the air inlet or the aluminum fins of the unit.
WARNING
Please read this manual carefully and fully understand before
operating your dehumidifier.

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◼Do not operate the unit if it is dropped, damaged or showing signs of product malfunction.
◼Do not clean the appliance with any chemicals.
◼Ensure the unit is far away from fire, inflammable, or explosive objects.
◼The unit shall be installed in accordance with national wiring regulations.
◼Do not use means to accelerate the defrosting process or to clean, other than those
recommended by the manufacture.
◼The appliance shall be stored in a room without continuously operation sources (for
example: open flames, an operating gas appliance or an operating electric heater).
◼The appliance shall be stored so as to prevent mechanical damage from occurring.
◼Do not piece or burn, even after use.
◼Be aware that refrigerants may not contain an odour.
◼Pipe-work shall be protected from physical damage and shall not be installed in an
unventilated space, if that space is smaller than 8 m².
◼Compliance with national gas regulations shall be observed.
◼Keep any required ventilation openings clear of obstruction.
◼The appliance shall be stored in a well-ventilated area where the room size corresponds to
the room area as specified for operation.
WARNING
Any person who is involved with working on or breaking into a
refrigerant circuit should hold a current valid certificate from an
industry-accredited assessment authority, which authorizes their
competence to handle refrigerants safely in accordance with an
industry, recognized assessment specification.
WARNING
Servicing shall only be performed as recommended by the
equipment manufacturer. Maintenance and repair requiring the
assistance of other skilled personnel shall be carried out under the
supervision of the person competent in the use of flammable
refrigerants.
If you don't understand something or need help, please contact the dealer services.

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2.2 SAFETY PRECAUTIONS ON SERVICING
Please follow these warnings when to undertake the following when servicing a dehumidifier with
R290.
2.2.1 Checks to the area
Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary
to ensure that the risk of ignition is minimized. For repair to the refrigerating system, the following
precautions shall be complied with prior to conducting work on the system.
2.2.2 Work procedure
Work shall be undertaken under a controlled procedure so as to minimize the risk of a flammable
gas or vapor being present while the work is being performed.
2.2.3 General work area
All maintenance staff and others working in the local area shall be instructed on the nature of work
being carried out. Work in confined spaces shall be avoided. The area around the workspace shall
be sectioned off. Ensure that the conditions within the area have been made safe by control of
flammable material.
2.2.4 Checking for presence of refrigerant
The area shall be checked with an appropriate refrigerant detector prior to and during work, to
ensure the technician is aware of potentially flammable atmospheres. Ensure that the leak detection
equipment being used is suitable for use with flammable refrigerants, i.e. no sparking, adequately
sealed or intrinsically safe.
2.2.5 Presence of fire extinguisher
If any hot work is to be conducted on the refrigeration equipment or any associated parts,
appropriate fire extinguishing equipment shall be available to hand. Have a dry powder or CO2 fire
extinguisher adjacent to the charging area.
2.2.6 No ignition sources
No person carrying out work in relation to a refrigeration system which involves exposing any pipe
work that contains or has contained flammable refrigerant shall use any sources of ignition in such
a manner that it may lead to the risk of fire or explosion. All possible ignition sources, including
cigarette smoking, should be kept sufficiently far away from the site of installation, repairing,
removing and disposal, during which flammable refrigerant can possibly be released to the
surrounding space. Prior to work taking place, the area around the equipment is to be surveyed to
make sure that there are no flammable hazards or ignition risks. “No Smoking” signs shall be
displayed.
2.2.7 Ventilated area
Ensure that the area is in the open or that it is adequately ventilated before breaking into
thesystem or conducting any hot work. A degree of ventilation shall continue during the period that

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the work is carried out. The ventilation should safely disperse any released refrigerantand
preferably expel it externally into the atmosphere.
2.2.8 Checks to the refrigeration equipment
Where electrical components are being changed, they shall be fit for the purpose and to the correct
specification. At all times the manufacturer’s maintenance and service guidelines shall be followed.
If in doubt consult the manufacturer’s technical department for assistance.
The following checks shall be applied to installations using flammable refrigerants:
–The charge size is in accordance with the room size within which the refrigerant containing parts
are installed;
–The ventilation machinery and outlets are operating adequately and are not obstructed;
–If an indirect refrigerating circuit is being used, the secondary circuit shall be checked forthe
presence of refrigerant;
–Marking to the equipment continues to be visible and legible. Markings and signs that areillegible
shall be corrected;
–refrigeration pipe or components are installed in a position where they are unlikely to be exposed
to any substance which may corrode refrigerant containing components, unless the components are
constructed of materials which are inherently resistant to being corroded or are suitably protected
against being so corroded.
2.2.9 Checks to electrical devices
Repair and maintenance to electrical components shall include initial safety checks and component
inspection procedures. If a fault exists that could compromise safety, then no electrical supply shall
be connected to the circuit until it is satisfactorily dealt with. If the fault cannot be corrected
immediately but it is necessary to continue operation, an adequate temporary solution shall be
used. This shall be reported to the owner of the equipment so all parties are advised.
Initial safety checks shall include:
-those capacitors are discharged: this shall be done in a safe manner to avoid possibility of
sparking;
-that there no live electrical components and wiring are exposed while charging, recover ignore
purging the system;
-that there is continuity of earth bonding.

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3. INSTALLATION
3.1 LOCATION
1. Place the unit on a firm, level surface in an area with at least 30cm of free space around it
allow for proper air circulation.
2. Never install the unit where it could be subject to：
➢Heat sources such as radiators, heat registers, stoves or other products that products
that produce heat.
➢in an area where oil or water may be splashed
➢Direct sunlight
➢Mechanical vibration or shock
➢Excessive dust
➢Lack of ventilation, such as cabinet or bookcase
➢Uneven surface

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WARNING!
Install the unit in rooms which exceed4 m².
Do not install the unit in a place where inflammable gas may leak.
NOTE!
The manufacturer may provide other suitable example or may provide
additional information about the refrigerant odour.

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3.2 OPERATING THE DEVICE SAFELY
⚫Check the device after unpacking for any damages or scratches on it.
⚫Operate this unit in an ambient temperature from 5°C to 35°C.
⚫Do not use outdoors. This dehumidifier is intended for indoor residential applications only.
⚫Do not operate in close proximity to walls, curtains, or other objects that may block inlet and
outlet.
⚫Keep the air inlet and outlet free of obstacles.
⚫If tipped more than 45°, allow the unit to set upright for at least 24 hours before start up.
⚫Keep doors and windows close for better energy saving.
⚫Do not operate or store the unit in direct sunlight or rain.
⚫It is normal for air outlet to feel warm to touch after continuous operation on hot days.
⚫Empty the water tank before moving dehumidifier.
⚫Make sure the Water tank is correctly fitted otherwise the unit will not operate properly.
⚫The dehumidifier starts up in the mode selected when the unit was last used.
⚫The dehumidifier starts dehumidifying if the room humidity is 3% higher than the selected
humidity.
⚫There is a protective 3-minutes time delay of the compressor. Wait 3 minutes for the
dehumidifier to resume dehumidification.

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4. PRODUCT OVERVIEW
4.1 FRONT VIEW
BACK VIEW
Control Panel
Air Outlet
Caster
s
Front Cover
Filter Frame
Back Cover
Continuous Drain
Plug
Water Tank

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4.2 FEATURES
✓Powerful moisture removal (Up to 24L/day dehumidification)
✓ION + CARBON Filter
✓Continuous Drainage or 5L Water Tank
✓Clothes Drying Function/ Auto-Defrost
✓Humidity Monitor shows current air humidity.
✓Auto mode automatically adjusts humidity levels.
✓Electronic control/Auto shut-off/ auto restart
✓Effectively removes moisture, dust, and dust mites from the air.
✓1-24 hour timer to set the time of operation.
4.3 SPECIFICATIONS
MODEL
R-9424
Rated Capacity
24L/day (30℃, 80%RH)
Power supply
AC220-240V/50Hz
Power Consumption
280W/1.25A (30℃, 80%RH)
Noise
≤42 dB(A)
Water tank capacity
5 L
Maximum Refrigerant Charge
R290/75g
Net weight
13.5kg
Maximum suction side working pressure
0.7MPa
Maximum exhaust side working pressure
3.2MPa
Minimum room size
4 m2 (Floor area)

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5. OPERATION
5.1 CONTROL PANEL
FUNCTION KEYS AND INDICATORS
1.
POWER button
Press to switch the machine on or off.
2.
Sleep/Reset button
Press to turn sleep mode on or off. Hold this button to reset the filter
3.
Timer button
Sets a time for the unit to automatically start or stop.
4.
Fan speed button
Press to select fan speed between high and low.
5.
Hum button
Adjusts the humidity set-point within the range of 30%-80%.
6.
Purify/Lock button
Press this button to turn on/off purifying function; hold this button to
turn child lock function on or off.
7.
Mode Button
Press to choose Auto and Continuous Drying mode.
8.
Lock Light
Lights up when Child lock function is turned on.
9.
High Speed Light
Lights up when switch to High speed.
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4
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5
2
10
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10.
Low Speed Light
Lights up when switch to Low speed.
11.
Drying mode LED
Lights up when switch to Continuous Drying mode
12.
AUTO mode LED
Lights up when switch to AUTO mode.
13.
Digital Display
Displays humidity value, Timer setting or Temperature.
5.2 SETTINGS
Power button
Press POWER key to switch the machine on and off.
Humidity button
In the automatic mode, you can operate this button. Each time you operate the button,
the target humidity will increase by 5%, and the cycle will be 30% to 80%
Purify/Child lock
Press this button to turn on or off the purifying function, hold it for 3 seconds to turn on
or off the child lock function.
Timer button
Press the timer button to set the 1-24 hour timing function. Each time you press this
button, the value increase 1 hour and then you press this button, the value displayed on
the “88”display screen.
In the running state, use the timer function to "turn off the machine regularly".
In the standby state, use the timer function to "turn on the machine regularly".
Set the time to "00" to cancel the timing function.

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Speed button
The fan speed can only be adjusted in automatic mode.
Mode button
Press the mode key to switch between automatic and dry mode.
Automatic mode: adjustable humidity, adjustable fan speed.
Drying mode: The compressor keep working without controlling by humidity; Fan works
in high speed (fan speed and humidity are not adjustable).
Reset/Sleep
Touch the sleep button and the button light will be on to activate the sleep function.
Long press the sleep button to start the filter reset function.
5.3 SETTINGS INDICATOR LIGHT
Power indicator light
When the power cord is connected to the power supply, press this button and the
indicator light will show white light.
When the power indicator flashes, means the machine is defrosting.
Mode button indicator light
When you set the mode to auto mode, the auto mode indicator lights up.
When you set the mode to dry mode, the dry mode indicator lights up.

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Wind speed indicator light
When you set the wind speed to low, the low wind indicator lights up.
When you set the wind speed to high, the high wind indicator lights up.
Child-lock indicator light
Turn on child-lock mode, the child-lock indicator light is on.
Water full indicator light
When the water tank is full with water, the indicator light up and there is an alarm sound
to remind the user that the water is full. The unit will stop working automatically when the
tank is full.
ION+CARBON indicator light (Reset/Sleep)
When the ION+CARBON filter reaches its service life after one year, this indicator light
will turn green to remind users to replace the filter and clean the filter frame; long press
this button to start the filter reset function and the green light is off.
6. DRAINAGE
There are two ways of removal collected water produced by the unit.
A. Manual draining: Empty water tank by manual.
B. Continuous draining: Use gravity to drain condensate water by attaching a drain hose.

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6.1 Empty the water tank
⚫Do not remove the float out of the tank.
Make sure that the float can move freely and
that it will actuate the level switch when the
tank is full.
⚫Allow the tank to air-dry completely and slide
it back into place within the dehumidifier.
⚫After you have replaced the tank, plug the
unit back into its power source.
⚫If the water tank is very dirty, wash it with
cold/warm water. Do not use detergent, steel
wire ball, chemical dust cloth, gasoline,
benzene, thinner or other solvent treatment,
because it may damage the tank caused by
water leakage.
Warning!!!
Use only mild soap, water and soft cloth. Do not use any commercial cleaning solvents.