Morris MDB-12150HIW User manual

MDB-12150HIW

Contents
Safety Instructions
Appendix
Wifi Instructions Manual
Installation
Parts
Control Panel
Remote Control
Quick reference guide
Positioning
Water Drainage
Care and Maintenance
Troubleshooting
Product Repair
Technical Data
This product is using the environment friendly
refrigerant R 290. (ODP value is 0， GWP value is 3.3) ，
this refrigerant is tasteless and combustrible，
moreover， it can burn and explode under a certain
conditions； so please read this user manual carefully
3
before use and maintenance.
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6
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2

SAFETY INSTRUCTIONS
The room area of this product should be more than 4m² when it is used， repaired and
stored.
This product needs to be used and stored where there is no fire source(such as electric
heater at work， stove with open fire， etc.)
This product refrigerant maybe odorless.
Do not use any method to speed up the defrosting process or clean the frosted part.
Carefully read the instructions before operating the unit.
This appliance is for indoor use only and intended for use in a domestic environment
only. Any other use is not recommended by the manufacturer and may cause fire，
electrical shocks or other injury to user or property.
Rating：This unit must be only connected to AC 220-240V/50Hz earthed outlet.
Installation must be in accordance with regulations of the country where the unit is used.
lf you are in any doubt about the suitablity of your electrical supply have it checked and
if necessary， modified by a qualified electrician.
This dehumidifier has been tested and is safe to use. However, as with any electrical
appliances-use it with care.
Disconnect the power plug from socket before dismantling, assembling or cleaning.
Avoid touching any moving parts of the appliance.
Never insert fingers, pencils or any other objects though the guard.
This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities. It is also not intended for use by those with
a lack of experience and knowledge, unless they have been given supervision or
instruction concerning the use of the appliance by a person responsible for their safety.
Do not leave children unsupervised with this appliance.
Do not clean the unit by spraying it or immersing it in water.
Never connect the unit to an electrical outlet using an extension cord. If a power outlet
is not available, one should be installed by a qualified electrician.
Never operate this appliance if the cord， power adapter or plug is damaged. Ensure the
power cord is not stretched or exposed to sharp object/edges.
A damaged power supply cord should be replaced by the manufacturer or a
qualified electrician in order to avoid a hazard.
Any service other than regular cleaning or filter replacement should be performed by
an authorized service representative. Failure to comply could result in avoided warranty.
Do not use the appliance for any other purposes than its intended use.
Do not tilt the unit while in use. The unit is design to work only in vertical position.
This dehumidifier must always be stored and transported upright， otherwise irreparable
damage maybe caused to the compressor; if in doubt we suggest waiting at least 24
hours before starting the unit.
3

Avoid restarting the dehumidifier unit unless 5 minutes have passed since being turned
off. This prevents damage to the compressor.
Never use the mains plug as a switch to start and turn o ffthe dehumidifier. Use the
provided ON/OFF switch located on the control panel.
Always place the unit on a dry and stable surface.
The appliance should not be installed in laundry or wet rooms where the humidity is
higher than 85% RH.
Do not dry laundry above the unit to prevent water entering the dehumidifier. Place the
laundry at least 1 meter away from your dehumidifier.
Do not place the unit next to heat sources (e.g. electrical fires， fireplaces， e tc.）
Avoid mishandling the dehumidifier. Dropping, throwing the unit can cause damage to
its internals and increases the risks of operating it.
Do not store or use gasoline, petrol, paint, solvents or other flammable vapours or liquids
in the vicinity of this dehumidifier or any other appliance.
This dehumidifier must not be used in spaces where there is a high concentration of
gases， solvent or other volatile organic compounds； in very dusty environments； in any
domestic， commercial or industrial environment where air composition is flammable.
Energy Saving and Unit Safety Protection Tips
Do not cover or restrict the airflow from the outlet or inlet grills. Do not operate and
follow troubleshoot procedure if the self-opening louvers do not open on power on.
For maximum performance the minimum distance from a wall or objects should be
20 cm.
Keep the filters or grills of the unit clean. Under normal conditions， filters or grills
should only need cleaning once every three weeks(approximately) .
Since the filters remove airborne particles, more frequent cleaning maybe necessary,
depending on the air quality. Vacuum both mesh and optional carbon filters and wash
the mesh filters with hot soapy water and dry them before placing them back in the unit.
Quick visual safety guide on where or when not to use your dehumidifier.
Exposed to the
weather outdoors
Near water If the power cable
wires are frayed or cut
Where small children
maybe
left unattended
If there is a risk
of water fa ling
on the unit
This product is not
made for DIY repair
Where there is a risk
or interference by
foreign objects
Where it may be
damaged by
chemicals
Where there is risk
of fire or close to a
naked flame
On a slope or
uneven surface
Where the power cable
may be damaged
If an extension lead
may become
overloaded
4

INSTALLATION
Remove any water from the water tank before starting the unit. In order to save energy， do
not open windows or doors while the unit is running. Place the unit on a hard/flat surface.
On first use run the unit continuously for 24hrs.
To reduce noise levels：
Place a piece of carpet or a rubber mat under the unit to reduce any vibrations while the unit
is running.
MDB-12150HIW dehumidifiers use compressor technology to extract water from the
environment.
The compressor dehumidifiers are ideal for normal domestic or office environments which
are heated during the winter months with temperatures above 12-15oC.
MDB-12150HIW dehumidifiers are easy to move around on castors and intelligent
dehumidifiers which will extract unwanted humidity while saving money due to their
humidistat and power saving logic. MDB-12150HIW dehumidifiers feature an intelligent
humidistat which is adjustable in increments of 5% from 40-80% RH insuring your room is
not dried too much and power is not wasted.
Features：
Your dehumidifier belongs to the low energy premium dehumidifiers featuring low power
consumption， power saving logic and advanced air purification option.
1. Easy to use controls.
2. Low energy only uses a fraction of the electricity of similar dehumidifiers.
3. Great for up to 5 bed houses.
4. Cost effective way to combat mould， condensation and damp.
5. Dries laundry more efficiently than a tumble dryer.
6. Designed to complement any modern space.
7. Castors for improved mobility.
8. Intelligent CPU controlled digital humidistat with 35-80% RH and room humidity display.
9. Quiet vs turbo fan operation ensures the right balance between quiet operation and
maximum dehumidification.
10. 24 hours start/stop timer.
11. Tank operation or permanent drainage option with splash proof tank.
12. Tank full alarm&auto-stop function.
5

PARTS
Air outlet
Humidity
indicator light
Control Panel
Handle
Wheels
Air inlet
Continuous
Drain Port
Power cord
Water tank
Pre-filter/activated
Carbon filter
HEPA Filter Activated carbon filter
6

CONTROL PANEL
POWER
Turn on/o ffthe appliance.
MODE BUTTON
Select the mode of the unit between： SMART/HIGH/LOW/andFAN. The unit will default to
SMART mode the first time it is switched on and remains in this mode until another option is
chosen.
SMART Mode-Desired humidity set to 50-55% relative humidity and the fan is automatically
adjusted depending on the current humidity level.
FAN Mode-No moisture will be extracted in this mode， which when used with filters will purify
the air. The UV and ION can also be used in this mode to further improve the qualify of air
emitted.
Press "MODE" key to select "FAN"， and"FAN" indicator light comes on. Only the fan will run in
this mode and not water is extracted.
Long press the button to enter the distribution network mode， and the SMART indicator flashes.
SLEEP
Press the "SLEEP" key to enter sleep mode. The appliance goes into sleep state
immediately, only the sleep mode indicator lights up slightly，all other indicator lights a
returned off. The fan switches to low speed. Press the sleep button again to exit the sleep
mode. The appliance resumes normal operation.
The indicator light color will change according to the humidity condition.
Red color means high humidity， RH>80%
Green color means comfortable， 80%≥RH≥60%
Blue color means dry， RH<60%
Press "Humidity Indicator light" key to turn on/o ffthe light.
Note：Can take about 2 minutes after the humidity before the indicator wil change the
colour e.g. if humidity drops to 55% may take 2 minutes before the indicator changes to
Blue.
Long press the "SLEEP" key， the indicator light will turn on automatically.
Sleep On/OffDown Mode
Up
Laundry Mode OSC Power UV/ION Timer
Water full indicator Defrost indicator
7

HUMIDITY SETTING
Press UP/DOWN key to select the desired relative humidity level， default relative
humidity is 55%. If relative humidity 35% is selected， the compressor will not
stop until the water tank is full.
TIMER (timer function)
Press timer to program time. "TIMER" light comes on while timer is being
programmed. Before programming make sure that the timer function has not
been activated(the light must be off). The following timer programs are available
a) Delayed power-on function(the appliance is in stand-by status) USE key "UP"
and "DOWN" to set the time period (1~ 24 hours), the appliance will start once
time reaches the set value.
b) Delayed power-off function (whilst the appliance is running), the appliance will
stop once time reaches the set value.
LAUNDRY
Press this button， the function is turned on or off， the dry mode indicator is on/
off. After the function is turned on， the front panel humidity display shows 35%
and the humidity is not adjustable； In this mode， the compressor does not stop and
continues to run until the water tank is full or you turn o ffthis function.
OSC (Oscillating function)
Press the "OSC" key， the louvers will swing up and down between 45°and 90°. When the
key is pressed again， the louvers wil remain in their current position.
*Press and hold this button for 3 seconds to enter the child lock mode, the child lock
indicator lights up, and other touch button touches are invalid
； after pressing and
holding this button for another 3 seconds, the child lock indicator light is off, and
other touch button touches are effective.
UV&ION
UV function and ION function are controlled by one key. Press the key and select the
related function， the related light will come on.
INTELLIGENT DEFROST
The appliance will defrost automatically as programmed once the coil sensor
detects that temperature is too low， and the defrosting indicator will light up
at the sametime. Once defrosting has finished， the appliance will recover to its
previous running mode.
TANK-FULL
If the water tank is full, the indicator light comes on and flashes.
Carbon filter (Air purification function)
Take out the carbon filter from the bag and insert it in the filter holder. It is suggested to
hoover the carbon filter every 2-3 weeks and change them every 3-6 months to always
keep the room fresh and odor free.
Humidity Level & Timer 2 digit display
The led indicator performs the following functions：1. When the unit is plugged in， it will
indicate the room humidity level 2. When the humidity level is selected， it will indicate the set
humidity 3. When the start/stop timer is programmed it wil show the set timer.
Notes：When humidity level is outside the normal operational parameters it will show LO/HI.If
ambient humidity is lower than 20%， it will show "LO". If ambient humidity is higher than 90%， it wil show "HI".
8

REMOTE CONTROL
Press the MODE button to change Smart/Fan/Laundry mode. Smart mode-desired humidity
set to 50-55% relative humidity and the fan is automatically adjusted depending on current
humidity level. The desired humidity can not be changed in this mode.
Fan button is not adjustable. No moisture will be extracted in this mode ， which when used with
filters will purify the air. The UV and ION can also be used in this mode to further improve the
qualify of air emitted.
Laundry mode-Press laundry button the function is turned on or off， the dry mode indicator is
on/off. After the function is turned on the front panel humidity display shows 35% ， and the
humidity is not adjustable； in this mode.The compressor does not stop and continues to run.
Until the water tank is full or you turn off this function.
In case you wish to turn off the front panel display you can keep the SLEEP
button pressed for 3". In case you want to turn it back on ，you can keep it again
pressed for another 3".
Press the timer button when the unit is
in operation， to turn on/o ffthe display
of "clock+OFF" icon， it will flash 5"，
then press up/down button to adjust
the 1-24h after which you want the unit
to shut down. Press the timer button
when the unit is in standby， to turn
on/o ffthe display of "clock+ON" icon，
it will flash 5 seconds， t hen press
up/down button to adjust the 1-24h
and select the time to turn on.
Press the SLEEP key to activate the
SLEEP mode. The indicator light will
illuminate. Enter the SLEEP MODE the
device will work at low fan speed and
low noise, display is off. Make an eco-
dehumidifying. Press the SLEEP key
again to quit the SLEEP mode， then
the device will work as per the last
setting before the SLEEP mode.
Press the lON button
to turn on/off
Turn on/off the child
lock by pressing
lock button within 3
seconds.
Press the UV
button to turn
on/off
Press the OSC
button to on/off
9

"i-Feel" Mode - The dehumidifier will work from the humidity reading taken by the remote， rather than
from the dehumidifier itself. To do this, the remote sends a humidity reading to the dehumidifier each
hour, which is then compared against the current setting, to decide whether the dehumidifier should be
operating. To activate this mode press the up and down arrows on the remote at the sametime, the icon “ ”
will flash to show the mode is running.
Please note： When i-Feel is on, the head of the remote control should be pointed towards the
dehumidifier and should be usually on more than 3 meters away from it (e.g. you have a damp spot in the
house and you want to monitor the humidity in that spot or next to a child bed instead) . The i-Feel
mode will fall if the remote is not positioned correctly towards the dehumidifier. Before activating i-Feel
mode please ensure that you can operate the unit via remote control from where the remote is placed.
Low battery will also affect the i-Feel mode.
10

QUICK REFERENCE GUIDE
Power Key Press to turn the dehumidifier on and off.
Timer： Select timer settings key then use keys to adjust the
timer(1-24hrs， start/stopping timer) . In power on mode the set number will represent
the number of hours the unit will run for before turning off. This will remain unaffected
if the unit goes into defrost mode or the tank is emptied and then reinserted. In standby
mode the set number represents the period in hours after which the unit will start.
To cancel start/stop mode press the timer key again.
Humidity Buttons：Press the Up or Down buttons when the unit is displaying
the current relative humidity to select the desired humidity level. The humidity level can be
set between a range of 35% RH(Relative Humidity) to 80% RH in 5% increments.
SMART Mode：This is designed for maximum convenience as it
maintains the room at an ideal domestic environment humidity
level of 50-55% RH while saving electricity. This is the default
mode and is recommended for most users.
The compressor will work until the desired humidity is reached
and then will stop.
When the humidity setting is finished， the appliance will operate according to the target setting
humidity. When it reaches the target humidity(the selected humidity is 2% lower than the user
selected humidistat setting) ， the compressor stops running， the fan continues running for five
minutes and then stops， and the swing will be shut down， but the display retains. The unit
shall keep this status for 30 minutes， then the swing and the fan open， and the fan starts running
to test the current humidity.If it has reached the setting value， the compressor starts running. If
the current humidity has not reached the setting value， the fan will be stopped after 5 minutes，
swing shuts down and shall again keep this status for 30 minutes， to make another cycle as listed
above. For dryer air/laundry mode press the key and set to a lower percent value (e.g. 35-45%).
Laundry Mode： For the dehumidifier to operate continuously with maximum water
extraction until the tank is full set the humidity level to 35%-50% RH. 35% is very dry and the
unit will work until water tank is full as 35% RH is hardly achievable in a domestic
environment. Set the fan to high on laundry mode and the louvres either to swing mode or
to 45 degrees directing the airflow on to clothes/laundry dryer. Do not place clothes directly
over any of the dehumidifier vents. Make sure that there is nothing blocking the hot air exhaust.
11

airflow and for best results place the laundry within 1.5 meters of the dehumidifier.
Note：In the SMART mode， though， if keys set humidity at 35%， and the machine is
running clothes drying mode， and it will continue dehumidifying， even if the ambient
humidity is less than 35%， and the compressor will not shut down. This mode applies to
drying clothes and other occasions that if permanent drainage pipe is fitted the unit will
not stop operation. Humidity set to achieve room humidity of around 35%， good for quick
drying boost on initial run or emergencies， laundry mode. Not recommended for long normal
operation in domestic/office environment. For allowing more moisture in the air， press the
humidity control key and set to a higher percent value (e.g. 60-70%).
Humidity set to 50-55% RH； recommended setting， great for domestic operation and dry
storage.
Humidity set to 60% RH； great for personal comfort and applications where 50% RH is
considered too dry
Humidity set to 70% RH； ideal for unoccupied properties or where economical run is needed
without the need to go drier than 70% RH.
Other features and Indicators
Tank Full Light
The light will be on and the unit will beep when the tank is ready to be emptied， or when the
tank is removed or not placed in the proper position. The water level control switch shuts off
the dehumidifier when the tank is full， or when the tank is removed or not placed in the proper
position. Empty and replace to resume operation.
Auto Defrost
The appliance will defrost automatically as programmed once the coil sensor detects
that the temperature is too low， and the defrosting indicator will light up at the same
time. Once defrosting has finished， t he appliance wil recover to the previous running mode.
Humidistat control and fan/compressor operation
When the selected humidity is 2% lower than the user selected humidistat setting； the
dehumidifier's compressor will be shut off automatically.
When the humidity is equal or higher than user selected humidity the compressor will restart
once the 3 minutes delay compressor protection expires.
Auto-Restart
If the unit stops o ffunexpectedly due to the power cut， it will restart with the previous
function selected automatically when the power resumes.
Power
After the unit has stopped， it is not recommended to resume operation for at least 10 minutes.
This is to protect the compressor. Operation can resume after this period lapses. When the
unit is restarted there is a 3 minutes delay before the compressor will start.
Lightweight Portable Design on castors
The dehumidifer is built to be compact and lightweight. The castors on the bottom of the unit
make it easy to move from room to room.
Your MORRIS dehumidifier is an advanced micro-CPU controlled device able of self-
diagnostics. The LCD display may also show the error and protections codes.
12

Positioning the dehumidifier
A badly positioned dehumidifier will have little effect. In positioning the dehumidifier please
ensure circulation of air in not restricted around the unit.
Allow at least 20cm space around the unit.
This dehumidifier is designed only for indoor
residential/small office applications and any
commercial or industrial use will invalidate the
warranty.
Use in an enclosed area for maximum efficiency.
Close all doors， windows to create an effective
operating environment. Do not use outdoors.
Your the dehumidifier will begin to protect your
space from the harmful effects of excessive
moisture as soon as it is turned on. Excess
moisture is dispersed throughout your home.
For this reason， the dehumidifier should be positioned in a central and clear location so that
it can draw this moist air towards it from all over the home. A warm hallway or landing is
an excellent position for your dehumidifier. If possible， le ave interior doors ajar to allow air
circulation.
Alternatively， if you have a serious problem in one area you can begin by positioning the
dehumidifier there and moving it to a more central location at a later date. For the most
effective use， run your dehumidifier with external doors and windows kept closed. Please
note the unit should not be placed directly against a radiator or other heat source.
When positioning your the dehumidifier， e nsure that it is placed clear of any obstacle that
may limit the air movement. Place the dehumidifier on a flat dry surface.
Note：Do not force castors to move over carpet or uneven surfaces， nor move the unit with
water in the tank as it may tip over and spill water.
Water Drainage
When the water tank is full, the unit will stop automatically. When this happens the tank full
red light will show on the control panel.
Note： Only empty the water tank when is full or before moving or storing the unit.
There are two ways to dispense collected water.
1. Use the tank.
When the tank is full the unit will automatically
stop running， and the Full indicator light will flash.
Slowly pull out the tank. Grip tank by its handle
securely， and carefully pullout. Empty the water
tank and reinsert it into the dehumidifier. The tank
must be in place and securely seated for the
dehumidifier to operate again.
The dehumidifier will re-start when the tank is
restored in its correct position.
13

NOTES：
When you remove the bucket， do not touch sensors or any parts which are situated behind tank.
Doing so may damage the product. Be sure to push the tank gently all the way into the unit.
Banging the bucket against anything or failing to push it in securely into place may cause the
unit not to operate.
Do not remove any parts from the water tank or tank enclosure. The water full sensor will no
longer be able to detect the water level correctly and water may leak from the water tank.
2. Continuous draining
Water can be automatically plumbed in or drained into a sink， a larger recipient or through the
wall into an outside drain by attaching a pipe to the unit (10mm internal diameter) (included).
Insert the pipe into the drain outlet at the back of the unit as shown here.
Make sure the connection between pipe and the drain outlet is tight and does not leak. Then
direct the pipe to a suitable drainage point. This unit uses gravity fall to dispose water hence
the drain should be lower than the unit water outlet. Put the tank back. Be sure to run the
water pipe downward and let the water to flow out smoothly. Do not kink or bend the pipe.
NOTE： When the continuous drain feature is not being used ， r emove the drain hose from
the outlet.
The permanent drain can be used in conjunction with water pump (e.g. when draining a cellar)
to lift the water upwards.
Care and Maintenance
Always shut off the unit and unplug from the mains before cleaning or performing any
maintenance. When it is not in use for long periods it is advisable to remove the plug from the
power socket. Do not use chemical solvents (such as benzene， alcohol or gasoline) as they may
cause irreversible damage to the unit.
1. Clean the Grille and Case
Use water and a mild detergent to clean the
washable mesh filters. Do not use bleach or
abrasives. Do not splash water directly on to
the main unit. Doing so may cause an electrical
shock and can lead to the insulation to deteriorate， or cause the unit
to rust. The air intake and
14

Remove the ABS frame and pull out the filters from the frame. Hoover gently the carbon filter
once every 2-3 weeks approximately.
If the mesh filter is dirty hoover it， if it is heavily soiled wash it with warm soapy water and
dry thoroughly before reinserting it in the unit.
When filter cleaning is finished and filters are dry placed them back into the filter frame and
reassemble the unit.
NOTE： While the carbon filter is optional never run the unit without the mesh filter frame
being assembled back.
NOTE：Do not use a dishwasher to clean the tank. After cleaning and drying the tank must be
reinserted securely into dehumidifier in order to restart operation.
End of Season Maintenance:
1. Empty and clean the water tank.
2. Clean the unit and the filters as per cleaning procedure above.
3. Coil the power cordon the special cord storage rest at the back of the unit.
4. Cover the unit and keep it in a dry place.
Frequently Asked Questions
Why doesn't the dehumidifier seem to extract much water if the temperature is low?
This is a compressor dehumidifier which works best in temperatures above 15℃. If the
temperature is low and the air is dryer than the setting on the humidistat the unit will not
extract water. If you want to use a dehumidifier for outside buildings， unheated properties，
boats or garages please check our desiccant range.
Why doesn't the unit work/or stops suddenly?
The water tank maybe full or displaced. To rectify： empty the tank and carefully place the
tank back in the unit. Also the unit maybe running in dehumidifying mode with a low room
o
temperature. Please check if the room temperature is lower than 5 C. If so， the unit will stop
working while in dehumidifying mode.(unit maybe defrosting) .
o o
The ambient operating range is between 5 C and 35 C with a relative humidity ranging from
o o
30% to 80%. For maximum efficiency use the unit between 15 C and 32 C.
Sometimes cold and/or hot air comes out from the air outlet grill why?
When the unit is in dehumidifying mode it absorbs humid air from room and freezes it to
reduce the humidity.
During the cold cycle there should be cold air coming out of the unit.
During the hot cycle hot dry air should becoming out of the outlet grill.
outlet grilles get soiled easily， so use a vacuum attachment or soft brush to clean. Wipe the
dehumidifier body with a soft damp cloth or kitchen towel.
2.Clean the water tank
Every few weeks， clean the tank to prevent growth of mould， mildew and bacteria. Partially
fill the tank with clean water and add a little mild detergent. Swish it around and than empty
the tank and rinse.
15

Troubleshooting
Issue Cause Solution
Hot or cold
air being
produced
Normal Operation When the unit is in dehumidifying mode it absorbs
humid air from room and freezes it to reduce the
humidity.
During the cold cycle there should be cold air coming
out of the unit. During the defrost cycle hot dry air
should becoming out of the outlet grill.
Unit does not
operate
Insert the plug into the socket and turn the switch
on.
Is the plug
properly
inserted in the
socket ?
Does the tank full
indicator is red?
Tank full， float displaced or tank not properly inserted.
Empty tank， check float and make sure tank is
properly inserted in unit.
Front louvres
do not open
Louvre motor is
blocked
Check if anything is blocking the louvre.
Try to move gently the louvres up and down while the
unit if off. If the above fails return the unit to service
centre.
Dehumidifier
does no
extract water
Is the unit set to a
humidity level lower
than the one in the
room?
Set the humidity level on the humidistat bellow
current humidity reading.
Is the temperature
too low for water
extraction to be
efficient?
Increase temperature in the room or reposition
the unit.
Is any intake grill or
discharge blocked?
Is the unit too close
to walls.
Remove obstructions and restart the unit.
Ensure a distance of at least 20cm between the unit
&walls.
Airflow seems
weak
Is filter dirty or
clogged?
Please service the filters regularly as per user
manual.
Unit is noisy
during
operation
Is the unit on
uneven surface?
Please place on flat horizontal surface.
Is filter clogged? Please service the filters regularly as per user manual.
Humidity sensor
error
Use the unit within the prescribed humidity range.
Unplug the unit， rest and plug it back in. If error
repeats， call for service centre.
Temperature
sensor error
Use the unit within the prescribed temperature range.
Unplug the unit， rest and plug it back in. If error
repeats， call for service centre.
Abnormal Coil
sensor
Temperature or
current
Use the unit within the prescribed humidity and
temperature range. Unplug the unit， rest and plug it
back in. If error repeats， call for service centre.
Unit is defrosting Allow the unit to automatically defrost. The protection
will clear after the unit self defrosts. Increase
temperature in the room if this repeats too often.
Water tank full
notification
Tank is full or is not in the right position--Empty the tank
and replace in the right position.
Any other malfunctions will need to be reported to the service centre. Do not attempt
unauthorised repairs as these may invalidate the warranty.
Tank full
red light
Defrost light
on and unit
stops
regularly
E5 or E6
E1 or E2
E3 or E4
16

A.1. Inspection of the site
Prior to servicing with flammable refrigerants， a safety inspection must be performed to
ensure that the risk of fire is minimized. When servicing the refrigeration system， the
following precautions should be observed before handling the system.
A.2. Operating procedure
Work should be performed under controlled procedures to ensure that the risk caused by
combustible gases or vapors during operations is lowest.
A.3. General working area
All maintenance personnel and other personnel in the work area should be aware of the
nature of the work being performed and should work within a confined space that should be
avoided. The work area should be properly segregated to ensure the safety of working
conditions in the work area by controlling combustible materials.
A.4. Check if the refrigerant is present
Pre-operation and during operation should be monitored in the area using an appropriate
refrigerant monitor to ensure that the technicians are aware of the presence of potentially
flammable gases and that all leak detection equipment is suitable for flammable refrigerants，
such as：no spark， fully enclosed or intrinsically safe.
A.5. Fire extinguisher placement
When performing heat-processing operations on the refrigeration system or related
components， the appropriate fire extinguisher should be located nearby and the refrigerant
injection area should be equipped with a dry powder or carbon dioxide fire extinguisher.
A.6. Prohibition of fire
When working in connection with exposed pipelines that contain or have contained
flammable refrigerants， all forms of ignition sources that may cause fire or danger to the
station should not be used. All sources of ignition , including smoking, are combustible. The
agent may be released into the surrounding environment. It must be far away from the area
where it is installed，repaired， relocated or disposed. Before starting work， the surrounding
environment of the equipment must be inspected strictly to ensure that there is no danger of
flammability or fire， should set up the mark of “ N o Smoking”.
A.7. Ventilated area
Ensure that the work area is open or fully ventilated before opening the system or performing
hot work operations. Ventilation should be maintained during operation. Ventilation will safely
dilute the leaked refrigerant and quickly release it into the atmosphere.
A.8. Inspection of refrigeration equipment
If you replace electrical components， these electrical components should be installed in
accordance with the day-to-day and night-time operating regulations. At all times， the
manufacturer's maintenance and repair guides should be followed. If in doubt， consult
PRODUCT REPAIR
Warning： The appliace should b stored in a well-ventilated room. The area of the room
the manufacturer's technical department.
should be equal to the room area required for maintenance.
--Warning： Appliances should be stored in rooms where there is no continuous burning fire
(such as ignited gas appliances) and ignition sources(such as electric heaters at work)
---All operators or refrigeration circuit maintenance personnel should obtain a valid
certificate issued by an industry-approved assessment agency to determine their qualification
for safe disposal of refrigerants as required by the industry-approved assessment specification.
---The maintenance and repair of the equipment can only be carried out according to the
method recommended by the equipment manufacturer. If other professionals are required to
assist in the maintenance and repair of the equipment， they should be supervised by
personnel qualified to use flammable refrigerants.
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of the terminals, damage to the seals and sealing. Cover installation error and other hazards
The following inspection items apply to the installation of flammable refrigerant appliances：
-The charge should be determined according to the size of the room containing the refrigerant
containing components；
-Ventilation equipment should operate normally and vents should be free from obstructions；
-If an inter-refrigeration refrigeration cycle is used， check the presence of refrigerant in the
secondary circuit；
-The logo on the appliance should be clearly visible. Marks and symbols that are indelible；
-Refrigerating lines or electrical components should not be installed in environments that
contain possible housing contact elements， unless the electrical components are made of
corrosion-resistant materials or suitable corrosion protection measures are taken.
A.9.Inspection of Electrical Installations
The repair and maintenance of electrical components should include initial safety inspections
and component inspection procedures. If there is a defect that compromises safety， the
appliance power supply must be de-energized until the defect is properly disposed of. If
the defect can not be completely eliminated in the end， and must continue to operate， then
appropriate temporary solutions should be taken， report the situation to the owner of the
appliance， and warn all relevant personnel.
B. Maintenance of sealinng elements
B. 1 When repairing close components， disconnect the power supply of the device
before opening the sealed cover. If there is power supply during the maintenance process，
uninterrupted leak detection should be performed on the most dangerous parts to prevent
potential dangerous situations from occurring.
B.2 In the following maintenance of electrical components， special care shall be taken not to
cause maintenance methods affecting the degree of protection of the enclosure. Improper
maintenance may result in damage to the cables , excessive connection, i m proper installation
Ensure the installation of the equipment is safe and reliable.
Ensure that the sealing or sealing material does not lose its effect of preventing the entry
of flammable gases due to aging, and the replacement parts should comply with the
manufacturer's specifications.
Note：The use of silicon-containing sealants may reduce the detection capabilities of leak
detection equipment，intrinsically safe components do not have to be isolated before operation.
C. Intrinsically safe component maintenance
If it can not be ensured that the appliance does not exceed the limits of the allowable voltage
and current during use， no permanent inductance or capacitive load must be used in the circuit.
The essential Ankh-type element is the only element that can continue to operate within the
flammable gas. The test instrument should be set in the correct gear.
If the replacement component can only use components specified by the manufacturer， other
components may cause the refrigerant that is leaking in the air to catch fire.
D. Cable
Check the cable for wear， corrosion， overpressure，vibration，sharp edges or other adverse
environmental effects. This inspection should also consider the impact of aging or the
continuous vibration of the compressor and fan on the cable manufacturing.
E. Inspection of flammable refrigerants
Inspection refrigerant leakage should be done in an environment where there is no potential
source of ignition and should not be detected using a halogen probe(or any other detector
using an open flame).
The initial security check should include：
-Capacitor discharge should be performed in a safe manner to avoid sparks.
-No exposed electrical components and wiring during filling， recycling and cleaning of the
system.
-Continuity of grounding.
A.9. Inspection of Electrical Installations
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F. Leak detection method
For systems containing flammable refrigerants， the following methods for detecting leaks are
acceptable：
Electronic leak detectors can be used for the detection of flammable refrigerants， but the
sensitivity may not be sufficient or may require recalibration (the instrument calibration
should be performed in a refrigerant-free environment) to ensure that the leak detector does
not become a potential ignition source， and applies to the measured refrigerant， th e leak
detector should be set to the lowest flammable concentration of the refrigerant (in percent)，
calibrated with the used refrigerant and adjusted to the appropriate gas concentration test
range (max.25%).
The leak detection fluid is suitable for most refrigerants， but do not use oxygenated solvents
to prevent oxygen and refrigerant from reacting and corroding the copper pipeline.
If leakage is suspected， all open flames should be removed from the site or extinguished.
If a leak occurs where welding is required， all refrigerant should be recovered， or the refrigerant
should be completely isolated away from the leak (using shut-off valves). Before welding and
during welding， use oxygen-free. Nitrogen (OFN) purifies the entire system.
G. Remove and vacuum
When performing maintenance or other operations on the refrigeration circuit， routine
procedures should be followed， but the flammability of the refrigerant should also be
considered. Follow these procedures：
-Clear refrigerant
-Purge the line with inert gas
-Vacuum
-Purge the pipe again with inert gas
-Cutting pipelines or welding
Refrigerant should be recycled to a suitable storage tank. The system should be purged with
oxygen-free nitrogen to ensure safety. This process may need to be repeated several times.
This operation must not be performed with compressed air or oxygen.
In the purging process， the system is filled with oxygen-free nitrogen to reach the working
pressure under the vacuum state， and then the oxygen-free nitrogen is discharged to the
atmosphere. Finally， the system is evacuated to a vacuum， and the process is repeated until
the refrigerant in the system is completely removed. After the last charge of anaerobic nitrogen，
the gas is released to atmospheric pressure and the system can then be welded. Such as pipe
welding operations， the above operation is very necessary.
Make sure there are no ignition sources near the outlet of the vacuum pump and that it is well
ventilated.
H. Charge the refrigerant program
As a supplement to regular procedures， add the following requirements：
-Ensure that when using the refrigerant charging equipment， no inter-contamination between
different refrigerants will occur， and the piping for charging the refrigerant should be as short as
possible to reduce the residual amount of refrigerant therein.
-Tanks should be kept vertically upward
-Ensure that the cooling system has been grounded before filling the refrigerant
-Label the system after filling (or when it has not been completed)
-Must pay attention not to overcharge
The pressure test was performed with oxygen-free nitrogen before recharging the system.
After the fillng was completed， a leak test was performed before the test operation. A leak test
should be conducted when leaving the area.
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I. Retired
Before proceeding with this procedure， technicians should be fully familiar with the equipment
and all its features and recommend the practice of safe recovery of refrigerants. To recycle the
recovered refrigerant， analyze the refrigerant and oil samples before performing the work.
Before testing， ensure that you have the necessary power supply.
a>Familiar with the equipment and operation.
b>Disconnect the power.
c>Before proceeding with this procedure， ensure that：
-If necessary， mechanical operating equipment should facilitate the operation of refrigerant
storage tanks.
-All personal protective equipment is effective and can be used correctly.
-The entire recycling process should be conducted under the guidance of qualified personnel
Recycling equipment and storage tanks should meet the appropriate standards.
d>lf possible， vacuum the cooling system.
e>If the vacuum state is not reached， extraction should be performed from multiple places to
extract the refrigerant in each part of the system.
f>Ensure that the volume of the tank is suffcient before beginning recovery.
g>Start and operate the recycling equipment according to the manufacturer's operating
instructions.
h>Do not talk about tanks being overfilled. (Liquid injection volume does not exceed 80% of
the tank volume.)
i>The maximum working pressure of the tank must not be exceeded even for a short period of
time.
j After the tank filling is completed and the working process is completed， e nsure that the
tank and equipment are quickly removed and all shut off valves on the equipment are closed.
k>The recovered refrigerant must not be injected into another refrigeration system until it
has been purified and tested.
J. Recycling
The refrigerant in the system needs to be removed during maintenance or scrap. It is
recommended that the refrigerant be completely removed.
When loading the refrigerant into the tank， use only a dedicated refrigerant tank. It is
necessary to ensure that the capacity of the tank is compatible with the amount of refrigeration
injection in the entire system. All are tanks intended to be used for refrigerant recovery and
are identifed with this refrigerant(ie refrigerant recovery dedicated tanks). Tanks should be
fitted with pressure relief and shut-off valves and in good condition. If possible， e mpty storage
tanks should be evacuated and kept at room temperature before use.
The recovery equipment should maintain a good working condition， and the equipment
operation instructions should be provided for easy reference. The equipment should be
suitable for the recovery of flammable refrigerants. In addition， there must be qualified
weighing instruments that can be used normally. The hose should be connected using a leak-
free， releasable joint and keep it in good condition. Before using the recycling equipment，
check whether it is in a good condition， whether it is well maintained， and all the electrical
components are sealed to prevent the fire from leaking once the refrigerant leaks. If in doubt，
consult the manufacturer.
Recovered refrigerant should be contained in the used storage tank， attached with shipping
instructions and returned to the chiller manufacturer. Do not mix the refrigerant in the
recovery equipment， especially the storage tank.
If you remove the compressor or remove the compressor oil make sure that the compressor
is evacuated to a suitable level to ensure that there is no residual flammable refrigerant in
the lubricant. Evacuation is performed before the compressor returns to the supplier. Only
use electric heating to heat the compressor housing to speed up this process. When the oil is
discharged from the system， safety should be ensured.
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