Midea JL1850S-RO User manual

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Service manual
Water Purifier
JL1850S-RO (Z80)
When replacing parts, be sure to use specified parts at parts list for safety and
performance maintenance

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CONTENTS
Safety instructure and accessories...................................................................... 3
Product Specification......................................................................................... 5
Principle of operation ........................................................................................ 7
System Diagram ................................................................................................ 8
Construction Views........................................................................................ 9~9
Product feature ................................................................................................ 10
Electrical schematics and wiring diagrams........................................................11
Preparation before operation of the water purifier.......................................12~15
The display panel is shown as below:............................................................... 16
DISPENSING WATER.................................................................................... 16
Operational precautions................................................................................... 17
Maintenance.................................................................................................... 18
Trouble shooting.........................................................................................19~30
Dismantling/Assembling.............................................................................31~35
Introduction of Key electrical components Parts.........................................35~36
Product Exploded views and Part List.........................................................36~39

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Safety instruction and accessories
(1) Safety instruction
16.Appliance the are obviously damaged must not operated.

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17.If the replacement of the UV-C emitter by the user is not allowed,this must be clearly stated.
18.WARNING: When positioning the appliance, ensure the supply cord is not trapped or
damaged.
19.WARNING: Do not locate multiple portable socket-outlets or portable power supplies at the
rear of the appliance.
20.To ensure the product using well, please make sure the product installation, testing and filter
exchange are made by aftersales service person.
(2) Supplied items

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Product Specification

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Principle of operation
Supply power, all icons flash for 5 seconds, the product makes "beep" sound once
Low floater is closed,
lack of water
Y
High floater is
closed, full of water
Y
Water production (power on the
pump and inlet valve)
Supply water
Pressing the Heating/Cooling switch
Flush (power on the pump, inlet valve,
waste valve), duration is 25 seconds
N
Heating and Cooling is running
NTC reaches the
temperature point
Heating and Cooling are finished
Flush (power on the pump, inlet valve,
waste valve), duration is 50 seconds
Y
Discharge water for
40 seconds
Water production (power on
the pump and inlet valve)
Y

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Filter function
System Diagram
1、the water flow inside of water purifier：

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2、the water flow outside of water purifier：
Construction Views
1、Front 2、Back

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3、Left 4、right
4、Top 5、bottom
Product feature
Product strong point
Booster pump
1. Increase the pressure on the front end of the RO filter element; ensure the system
works properly to produce purified water.
2. Rated voltage: 24V.
3. Rated current: ≤1A.
4. Rated flow: ≥0.55L/min

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Electrical schematics and wiring diagrams
WARNING: Disconnect electrical power before servicing.
Caution: Label all wires prior to disconnection .Wiring errors can cause improper.

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Preparation before operation of the water purifier
Installation procedure
οSetting the installation location
②Disassemble the package
③Take out water purifier and accessories
④Connection of water supply tube
⑤Connection of drain tube
⑥Open the water inlet valve.
⑦Turn on electricity
⑧Water leakage check
⑨Instruction for use
⑩Final inspection
⑪Finish
Setting the installation location
Install it in the room close to the power source, water source and floor drain,
install in a dry place without direct sunlight, and keep away from flammable and
explosive materials.
Keep this machine in a dry and cool place and avoid direct sunshine. Rearward of
the machine shall be at least 25 cm away from the wall. Never put the machine on
paper or foam, which may store water and then cause creepage. Never put
anything flammable beside this machine.
Do not use the machine outdoors or in a place that can be splashed by water.
Fixing guide
WARNING: Please cut off water source before replacing filters. Never plug filters in
water running state.
1. Unpack the product.
2. Put the accessories aside.
3. Take out the quick joint, and install it on the water pipe. Clamps should not be
missed.

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4. Open the lower door .
5. Use the after sale accessory—filter flushing tip, the arrow direction is the water
flow direction, insert the PE pipe in the quick joint.
6. Insert the C1 active carbon filter into the filter flushing tip, tighten it by turning
anticlockwise, and open the water tap to flush the filter till it doesn't discharge black
water, for about 10min; Take the same step to flush the C2 active carbon filter-F1.
Take the same step to flush the PP filter for 5min.
7. Install the clean filter in the product, hold the filter with the left hand and enclosure
of filter with the right hand, and insert it upwards in the filter, tighten it by turning
anticlockwise, the installation order is: PP sediment filter-F1→C1 active carbon
filter-F1→RO reverse osmosis filter-F1→C2 active carbon filter-F1.After washing
and installation of filters, the lower door must be fixed with original screws.
8. Take out the pin of the quick joint at the rear of the products side plate's, and then
take out the white plug.

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9. Insert the water inlet PE pipe in the quick joint, and tighten the pin. The new
hose-sets supplied with the appliance are to be used and that old hose-sets should not
be reused.
10. The water cooler plug cord into a ground fault interrupter receptacle.
11. After installation, supply water and power. Discharge the first 3 tanks of purified
water by pressing the button, press the Heating and Cooling buttons on the rear panel
to purify water again, then the water output is drinkable.
12. When installing filter and replace filter please turn off the water and power supply
before installation and replacement.
13. Concentrated water and the water drained from the water tray can be directly
discharged into the sewer or the water drained from the water box can also be
discharged to the bucket. (Note: Drainage pipe must be vertical and shall not be "U"
or twisted at any section)

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15. Machine Installation
1-2. Loosen the screw of the left or right bottom angle just as the picture shown.
3. Use the screw to fix the bracket on the left or right bottom angle of the water
purifier.
4. Make a hole on the floor's or the desk's surface where the water dispenser will be
installed.
5. Fix the bracket on the floor by screw tightly.
6. Tighten the screw.
Inspection and confirmation
1. Confirm there is no water leakage from the branch faucet connected to pure water,
the tube /filter inside the main body, and the connecting part.
2. Make sure that the drain tube does not move due to the force of drainage.
3. Confirm that sound and vibration during pump operation resonate on the
installation surface and abnormal sound does not appear.

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The display panel is shown as below:
1. “ ” When displays as this, it indicates that water heating is completed.
2. “ ”When displays as this, it indicates that water is heating.
3. “ ”When displays as this, it indicates that water cooling is completed.
4. “ ”When displays as this, it indicates that water is cooling.
5. “ ”It indicates that there's insufficient water in the machine.
6. “ ”It indicates that there's sufficient water in the machine.
7. “ ”When it is on, it indicates that the machine is purifying water.
8. “ ”When indicator in this area flashes, it indicates that the filter of
corresponding level expires, please replace the filter.
DISPENSING WATER

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5. Additional remarks
Non-filter reset mode, the button functions are as follows:
Button
Operation
Function
Hot water + warm water
Hold for 3 seconds
Reset the expired filter
Warm water + cold water
Hold for 3 seconds
Enter single filter reset mode
Child lock + cold water
Completed within 20
seconds after power-on
Hold for 10 seconds
Restore factory settings
Single filter reset mode, the button functions are as follows:
Button
Operation
Function
Cold water
Touch
Select the next filter
Cold water
Hold for 3 seconds
Reset the current filter
Operational precautions
Changing Filters
1. The name of the filter keeps on during operation. When the filter life reaches 0, the
corresponding filter indicator flashes, otherwise it is always on.
2. The filter life data is as follows. The filter life is continuously decreasing when it is
powered on (no matter whether it is producing water):
PP
C’
RO
C”
3~6 months
6~12 months
12~24 months
6~12 months
Note: 30 days for 1 month.
3. Please cut off the power supply and water supply before replacing the filter.
4. Flush the new filter according to the filter flushing requirements in the installation

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instructions (except for the RO membrane filter).The RO membrane filter shall be
flushed through the mode that repeatedly supply and cut off power of the whole
machine for 10 times, and hold for 25 seconds each time.
5. Open the lower door, remove the old filter to be replaced, and replace it with a new
filter. Note that the filter must be installed in place.
6. Lock the lower door with the original screws.
7. Filter forced reset setting
Hold the cold water button + warm water button for 3 seconds to enter the filter reset
mode. The first filter indicator and name begin to flash, the digital tube does not flash
to display the remaining percentage of life, hold the cold water button for 3 seconds to
reset the filter, and the filter life recovers to 100%, press the cold water button to
display the next filter, operate to reset and switch to the next filter with the same step,
at the last filter, press the cold water button to exit the filter reset setting. The water
output buttons are used as normal. During the filter reset process, if no button is
pressed for 30 seconds, the filter reset mode is automatically exited. The filter life is
accumulated in hours according to the power-on time, and is saved after power-off.
Note: In the filter reset mode, press the water output button, the system will not output
water, after exiting the filter reset mode, the water output control function is restored.
Maintenance
1. Keep this machine in a dry and cool place and avoid direct sunshine. Rearward of
the machine shall be at least 25 cm away from the wall. Never put the machine on
paper or foam, which may store water and then cause creepage. Never put anything
flammable beside this machine. Do not use the machine outdoors or in a place that
can be splashed by water.
2. For the water purifier, the installation and replacement of filters must be carried out
by qualified personnel.

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3. In case the machine is not in use for a long time, turn off the heating switch or the
refrigerating switch to save power.
4. In case the machine is not needed for a long time, please take off the plug, turn off
the copper chrome-plated ball valve and drain off the remaining water through the
outlet. For another use, discharge water for 10 min. In the event that the machine is
blocked by ice due to the environment below ice point, keep the refrigerating switch
closed for 4 hours and then turn it on to continue the operation.
5. In case the water supply is cut off, please close the feed water ball valve and cut off
the power, after water re-supply, please open the other faucets to discharge sediment
and then turn on the feed water ball valve.
6. The machine must use an earthed three-pin socket and a reliable creepage
protection switch.
7. Never use organic solvents such as gasoline to clean the machine: strictly prohibit
washing the machine with water or splashing water to the machine.
8. Never turn on (off) the machine by inserting the plug into (pulling the plug out
from) the socket. Never increase the length of the supply cord to avoid fire.
9. If the supply cord is damaged, it must be replaced by the manufacturer or qualified
person so as to avoid a hazard.
10. The water source for the water purifier is civil tap water.
11. Never dismantle spare parts of the machine to avoid water leakage or damage.
12. Never turn the machine upside down or lean it more than 45° when moving it so
as to avoid any damage to it or any accident.
13. Limited warranty: electrical components and water system are warranted for 12
months from date of purchasing.
Trouble shooting
In case of failure, please carry out inspection according to the requirements below. If
unresolved, please contact the local service agency.
Failure
Cause(s)
Solution
Amount of produced
water is reduced
seriously
Filter is blocked or not
replaced in time
Please contact the local service office to
replace the filter in time.
Water inlet ball valve is not
fully opened
Fully open the water inlet ball valve
Water pressure is too low
Take measures for pressure boosting
Output water quality
is low
Filter failure
Please contact the local service office to
replace the filter in time.
Long-term shutdown (over
3 days)
Continuously start and stop the product
for 5 times at 40 seconds intervals to
automatically flush the filtration system,
and feed and discharge the water from
the water storage system according to the
first step of the Clean Maintenance; after
that, the output water can be used
normally

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Source water quality is low
Use municipal tap water
Screen displays E0
Water leakage
See the fault code troubleshooting
method for details
Screen displays Ec
High floater is closed, low
floater is closed
See the fault code troubleshooting
method for details
Screen displays Ed
The high floater is closed,
and the high floater is still
closed after 90 seconds of
accumulated water output
See the fault code troubleshooting
method for details
Screen displays Fc
Below 85℃, it still fails to
reach the target temperature
if no hot water is taken and
the system continuously
heats for 2 hours
See the fault code troubleshooting
method for details
Screen displays E5
Communication failure
between power board and
display board
See the fault code troubleshooting
method for details
Screen displays E6
Water is not taken, the water
purification tank keeps
producing water for 3 hours
See the fault code troubleshooting
method for details
See the fault code troubleshooting
method for details
See the fault code troubleshooting
method for details
Screen displays F1
Hot water sensor temperature is
over 120℃or short circuit
See the fault code troubleshooting
method for details
Screen displays F2
Hot water sensor temperature is
below -11℃or open circuit
See the fault code troubleshooting
method for details
Screen displays F3
Cold water sensor temperature
is over 120℃or short circuit
See the fault code troubleshooting
method for details
Screen displays F4
Cold water sensor temperature
is below -35℃or open circuit
See the fault code troubleshooting
method for details
Fault code troubleshooting method