Midea Yl1335s-w User manual

Service Manual_2018-V1.0

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Service Manual

COMPRESSOR COOLING OF A PLATFORM SERIES

Applicable Models

YL1335S-W

YL1337S-W

YL1345S-W

YL1535S-W

YL1631S-W

YL1635S-W

YL1637S-W

YL1638S-W

YL1662S-W

YL1661S-W

YL1675S-W

YL1674S-W

YL1672S-W

YL1732S-W

YL1740S-W

YL1673S-W

Prepared by

R&D:

Reviewed by

QA:

SVC:

Approved by

R&D:

SVC:

Service Manual_2018-V1.0

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(The picture in this service manual is only for reference, and specific appearance and

configuration are subject to the real product)

Midea Water dispenser

Technical Maintenance Manual

Copyright @2018

approval by the Overseas Sales Corporation of Midea water dispenser.

WARNING

Important Safety Notice

The Maintenance Manual is only for the use of maintenance personnel with certain experience and

background in electrical, electronic and mechanical field.

Any attempt to repair main devices may lead to personal injury and property loss.

Manufacturers or distributors are not responsible for the content of the Manual and interpretation thereof.

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Contents 
DEFINITION AND CLASSIFICATION OF WATER DISPENSER ...................................................................... 4
1 DEFINITION OF WATER DISPENSER ............................................................................................................................ 4
2 NAMING RULES OF WATER DISPENSER ...................................................................................................................... 4
STRUCTURE AND TECHNICAL CHARACTERISTICS .................................................................................... 5
1 WATER DISPENSER STRUCTURE AND KEY COMPONENTS BRIEF INTRODUCTION (VERTICAL TYPE).......................... 5
2 WATER DISPENSER WORKING PRINCIPLE .................................................................................................................. 6
PRODUCT TECHNICAL CHARACTERISTICS PRODUCTION ....................................................................... 9
1 INSTRUCTIONS ........................................................................................................................................................... 9
2 FUNCTION INTRODUCTION ......................................................................................................................................... 9
3 TECHNICAL PARAMETER........................................................................................................................................... 10 
INSTALLATION SPECIFICATION.......................................................................................................................15 
1 INSTALLATION REQUIREMENTS................................................................................................................................. 15 
2 MACHINE INSTALLATION ........................................................................................................................................... 15 
PRODUCTION FAULT SOLVING METHOD ......................................................................................................16 
1 SIMPLE TROUBLESHOOTING..................................................................................................................................... 16 
2 MACHINE HEATING FAILURE ..................................................................................................................................... 16 
3 MACHINE REFRIGERATING FAILURE (ONLY FOR COMPRESSOR DESK TYPE)........................................................... 18 
MAINTENANCE---CLEAN ...................................................................................................................................20 
INSTRUCTIONS FOR DISMANTLING THE MACHINE  ..................................................................................21 
 
 

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1. Definition and classification of water dispenser

1.1 Definition of water dispenser

Water Dispenser：

------Is a barrel (bottle) installed direct drinking water (distilled water, purified water, mineral water, or

filtered water, etc.) for heating, cooling or in the original water temperature secondary distribution, to

provide a device for drinking!

1.2 Naming rules of water dispenser

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2. Structure and technical characteristics

2.1 Water dispenser structure and key components brief introduction (vertical type)

This model is for reference only

N°

PART NAME

N°

PART NAME

1

Bottle supporter

8

Power cord

2

Top cover

9

Drainpipe connector

3

Water buttons

10

Condenser

4

Display board

5

Water mouth

6

Drip tray & Drip tray cover

7

Lower door

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2.2 Water dispenser working principle

Principle of water diversion:

Generally, use bottled drinking water of 3 gallons and 5 gallons, insert the bucket into the bottle

supporter at the top of water dispenser reversely, the smart head in the

smart seat jacks up the seal cover in water bottle, so that water in bottle

enters into water dispenser through the inhalant orifice of smart seat, water

is stored in the water diversion chamber (or cold liner).

While, air also enters into the bucket through the hole in the bottle

supporter, by utilizing the balance of air pressure, the water level in

diversion chamber will remained at the mouth of the bucket eventually; by

utilizing the pressure difference of water level, the water in the diversion

chamber enters cold and hot water tanks for refrigeration and heating, user

controls water to discharge from faucet or drain outlet.

Cooling system (Compressor cooling):

:

Using semiconductor materials Peltier effect（ The role of electricity to

make the semiconductor cooling chip difference temperature ）， and then

through the heat exchange to achieve the cooling effect;

:

This cooling method: High thermal efficiency ，Low water temperature（＜10℃），Fast cooling，

and can option the refrigerator function

P

G

=∆P+P

L

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Heating system:

Internal heating: heating tube is placed in the heat tank, contact with the water directly for

heating; the manufacturing process of this kind of heating method is simple, thermal efficiency is

high, but it is easy to form limescale, thus resulting in heating tube failure; this kind of heating

method is unsuitable for mineral water and simply filtered tap water particularly.

External heating: The heating body is placed outside the heat tank,

water is heated through heating the tank body; the reliability and

security of this kind of heating method is higher than internal heating,

but the manufacturing process is complex, cost is high, thermal

efficiency is low, power consumption is large, and the heating process is

noisy.This kind of heating method is commonly used for users who

prefer to mineral water or using simple net bucket to filter tap water.

2.3 Precautions

1．To avoid damage to the machine, don't plug the power

cord or push the red switch until water runs out from the

tap of hot water.

2．In case hot (or cold) water is not needed for a long time,

turn off the switch accordingly to save power.

3. In case not to use this machine for a long time, turn off the

switch, then pull the plug out from socket and drain the

remaining water through draining outlet.

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4. Never use organic liquid to clean the machine.

Strictly prohibit using water to the splash it.

5. Never turn on (off) the machine by plugging the plug to (pulling the plug

out from) the socket. Never increase the length of the power supply cord

to avoid fire.

6. 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.

7. Never turn the machine upside-down or lean it more than 45°.

8. This machine should not be turned on until 3 minutes later

after turning off the power switch

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3. Product technical characteristics production

3.1 Instructions

1. Tear the label from the bottle.

2. Vertically insert the bottle into the bottle supporter on top

3. of the machine. Do not plug the power cord or push the

4. heating switch until water runs out from the tap of hot water.

5. Insert the plug to socket, then turn on the switch. Indicators light up

accordingly once the machine works.

6. Vertically pull out the bottle by two hands when the bottle is empty, then

replace it with another bottle of water.

7. This appliance should work under environment of temp from 10℃-43℃

8. This appliance is not suitable for installation in an area where a water jet could be used.

Remarks: This equipment can only use barrel (bottle) of direct drinking water (distilled water, purified

waters, mineral water, or filtration water, etc.), if use the water without treatment, and cause

equipment damage, manufacturers and agents shall not be responsible.

3.2 Function introduction

When pressing the refrigeration switch of water dispenser, refrigeration green indicator is lit,

compressor start operation, suck the heating absorbed and gasified refrigerant vapor in evaporator back,

then compressed into high-temperature and high-pressure gas, and sent to the condenser, disperse heat

through the condenser to the external air, and condensate into high-pressure liquid, then flow into the

evaporator through capillary throttling, absorb the heat quantity of cold liner, and make the water

temperature drop, and then sucked back by the compressor. Cycle like this to achieve the purpose of

cooling. When water temperature drops to the setting temperature with the time, the contact of

refrigeration thermostat is disconnected, the refrigeration green indicator is off, the compressor stops and

change to insulation condition. After power off, the water temperature gradually rises again, when rising to

the set temperature, the contact action of refrigeration thermostat closes, connect the power, green

indicator is lit, the compressor runs. Cycle like this to control water temperature between 6-10℃.

Press the heating switch, connect heating circuit, red heating indicator is lit, heating tube heating,

when water temperature rising to set the temperature, reset thermostat action automatically, cut off the

power supply, red heating indicator is off, change to insulation condition. After power off, the water

temperature drops gradually, when dropping to the set temperature, the thermostat contact action is

closed, connect power supply, red heating indicator is lit, heating tube heats up again. Cycle like this to

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control the water temperature between 85-95 ℃.Water dispenser heating thermostat or heat tank

temperature sensor and manual reset thermostat are protective device, when the circuit is overheated,

automatically disconnect the circuit when overloading, which plays a security protection role. (This

function only applies to hot and cold machine type, single cold machine type does not have this function)

3.3 Technical parameter

Midea Model

YL1335S-W

YL1337S-W

YL1345S-W

YL1535S-W

Voltage/frequency

220V-240V/50~60Hz

220~240V/50~60Hz(A)

115V60Hz(B)

220V-240V/50~60Hz

Cooling method

Compressor

Heating method

Internal Element

Refrigerant

type/Weight

R134a/28g

Noise (dBA)

≤55dB

Electrical

certification

GS/CE/CB

GS/CE/CB/UL

GS/CE/CB/U

GS/CE/CB

Function description parameter…

Capacity of heating

water (L/hr)

4L/H

Capacity of cooling

water (L/hr)

2L/H

Heating power (W)

420W

Cooling capacity (W)

120W

Working

environment

temperature

10-38℃

Working humidity

≤90%

Cold tank material

SUS304

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Hot tank material

SUS304

Dimension of hot

rank(mm)

φ100 *130（1.02L）

Dimension of cold

rank(mm)

φ160 *155（3L）

Packaging information…

Net weight (kg)

16.2KG

15.69KG

16.12KG

15.4KG

Gross weight (kg)

17.8KG

17.67KG

18.01KG

17.6KG

Net size(mm)

310*370*1000

310*362*1000

310*350*1000

Package size (mm)

358*386*1050

358*386*1095

Midea Model

YL1631S-W

YL1635S-W

YL1637S-W

YL1638S-W

Voltage/frequency

220~240V/50~60Hz

115V60Hz

220~240V/50~60Hz

115V60Hz

220~240V/50~60Hz

115V60Hz

220~240V/50~60Hz

115V60Hz

Cooling method

Compressor

Heating method

Internal Element

Refrigerant

type/Weight

R134a/28g

Noise (dBA)

≤55dB

Electrical certification

GS/CE/CB

/

Function description parameter…

Capacity of heating

water (L/hr)

4L/H

Capacity of cooling

water (L/hr)

2L/H

Heating power (W)

420W

Cooling capacity (W)

120W

Working environment

temperature

10-38℃

Working humidity

≤90%

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Cold tank material

SUS304

Hot tank material

SUS304

Dimension of hot

rank(mm)

φ100 *130（1.02L）

Dimension of cold

rank(mm)

φ160 *155（3L）

Packaging information…

Net weight (kg)

15.2KG

15.07KG

15.6KG

Gross weight (kg)

17.26KG

17.2KG

17.1KG

17.82KG

Net size(mm)

310*360*1000

310*370*1000

310*362*1000

Package size (mm)

358*386*1050

Midea Model

YL1661S-W

YL1662S-W

YL1674S-W

YL1672S-W

Voltage/frequency

220~240V/50~60Hz

115V60Hz

220~240V/50~60Hz

115V60Hz

220~240V/50~60Hz

115V60Hz

Cooling method

Compressor

Heating method

Internal Element

Refrigerant

type/Weight

R134a/28g

Noise (dBA)

≤55dB

Electrical certification

GS/CE/CB

UL

Function description parameter…

Capacity of heating

water (L/hr)

4L/H

Capacity of cooling

water (L/hr)

2L/H

Heating power (W)

420W

Cooling capacity (W)

120W

100W

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Working environment

temperature

10-38℃

Working humidity

≤90%

Cold tank material

SUS304

Hot tank material

SUS304

Dimension of hot

rank(mm)

φ100 *130（1.02L）

Dimension of cold

rank(mm)

φ160 *155（3L）

Packaging information…

Net weight (kg)

15.63KG

15.5KG

16.3KG

Gross weight (kg)

17.52KG

17.5KG

18.3KG

Net size(mm)

310*360*1000

310*350*1000

310*362*1000

Package size (mm)

358*386*1050

Midea Model

YL1740S-W

YL1673S-W

YL1732S-W

YL1740S-W

Voltage/frequency

220~240V/50~60Hz

115V60Hz

220~240V/50~60Hz

115V60Hz

220~240V/50~60Hz

Cooling method

Compressor

Heating method

Internal Element

Refrigerant

type/Weight

R134a/28g

Noise (dBA)

≤55dB

Electrical certification

GS/CE/CB

/

GS/CE/CB

Function description parameter…

Capacity of heating

water (L/hr)

4L/H

Capacity of cooling

water (L/hr)

2L/H

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Heating power (W)

420W

Cooling capacity (W)

120W

100W

120W

Working environment

temperature

10-38℃

Working humidity

≤90%

Cold tank material

SUS304

Hot tank material

SUS304

Dimension of hot

rank(mm)

φ100 *130（1.02L）

Dimension of cold

rank(mm)

φ160 *155（3L）

Packaging information…

Net weight (kg)

15.6KG

15.8KG

14.5KG

14.6KG

Gross weight (kg)

17.72KG

17.8KG

16.1KG

16.2KG

Net size(mm)

310*362*1000

310*350*1000

310x360x1005

Package size (mm)

358*386*1050

358*386*1060

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The packaging material used is recyclable; we recommend that you separate plastic, paper and

cardboard and give them to recycling companies. To help preserve the environment, the

refrigerant used in this product is R134a (Hydrofluorocarbon -HFC), which does not

affect the ozone layer and has little impact on the greenhouse effect. According to WEEE

(Waste of Electrical and Electronic Equipment) guidelines, waste from electrical and electronic

devices should be collected separately. If you need to dispose of this appliance in the future, do NOT

throw it away with the rest of your domestic garbage. Instead, please take the appliance to he nearest

4. Installation specification

4.1 Installation requirements

1. Keep this machine in place of dry and avoid direct

sunshine. Rear of the machine should be no more

than 25cm against from the wall. Never put the

machine on paper or foam, which may cause

unstable condition, Never put anything flammable

beside this machine.

2. The appliance is suitable for indoor use only.

4.2 Machine installation

1. Use the screw to fix the bracket on the hole of the

middle bottom of the water dispenser.

2. Make a hole on the floor’s (or the desk’s) surface

where the water dispenser will be installed.

3. Fix the bracket on the floor by screw tightly.

4. Tighten the screw.

WARNING! To avoid a hazard due to instability of the appliance, it must be fixed in accordance with the Instructions.

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5. Production fault solving method

5.1 Simple troubleshooting

1. Water is leaking.

Unplug dispenser, remove bottle and replace it.

2. No water is coming from the spout.

Maker sure the bottle is not empty. If empty, replace it .

Make sure to completely depress the pushbutton controls.

3. No ambient or cold water or hot water flows

1. Over consumption of ambient or cold water in short time--------- Just wait a moment, then hot or

cold water is available again

2. No water supply------- Connect plug to socket, turn on heating or cooling switch

4. Dispenser is noisy.

Make sure the dispenser is positioned on a level surface.

5.2 Machine heating failure

Check the related parts of heat tank

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Check power supply

Method for testing electric heating tube:

Adjust the multimeter to Resistance, test the resistance between two poles of electric heating tube,

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electric heating tube of different specifications shall have different resistances, if the test result is zero or

too high, it means that there’s defect. Table below is the corresponding resistance according to the

electric heating tube power range.

5.3 Machine refrigerating failure (Only for compressor desk type)

Since the water dispenser cooling defect is mainly shown as: compressor works but water dispenser

doesn’t cool water, compressor doesn’t start and water dispenser doesn’t cool water.

1. Before repair, check the circuit of the water dispenser and assure that the electric control part

works normally, please see Circuit Repair of Water Dispenser for detailed methods.

2. The repairing technicians must hold welder employment certificate.

3. Specific repair method is shown as below:

Compressor works but water dispenser doesn’t cool water

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Compressor doesn’t start and water dispenser doesn’t cool water

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6. Maintenance---Clean

To avoid accident, cut off the power supply before operation according to the

following instruction.

1. The machine had been disinfected before departed from factory.

Cleaning the dispenser prior to installing a full bottle of water for the first time.

2. Cleaning and draining instruction:

a. Making sure the power switch in the O (off) position and unplug the water dispenser before

cleaning.

b. Turn on all the taps in turn 3 minutes after the water outflow, which completes the internal

pipeline flushing.

c. Place a large bucket beneath the drain outlet. Remove the drain cover and allow water to

drain.

d. After draining, replace the drain cover and you can use the machine.

Attention: The dispenser heats water to a temperature of approximately 85°C. It can cause

severe burns, please operate it carefully.

3. Sanitizing

The machine should be disinfected with the disinfectant separately bought from drugstore or

marketplace according to the instruction manual of the disinfectant and then clean it with water. Generally

this should be done every three months.

4. To remove mineral deposits:

Mix 4 liters water with 200g citric crystals, inject into the machine and make sure the water can

Midea YL1335S-W User manual

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