Page 1
VESTEL WATER HEATER SERVICE MANUAL
VESTEL WATER
HEATER SERVICE
MANUAL
COVERS ALL BATH STOVES IN THE FIELD MANUFACTURED IN VESTEL
FACTORIES
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 1
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 2
1- GENERAL INFORMATION ABOUT WATER HEATERS
Safety: Each part of the water heater is checked carefully to provide excellent operation durability. Electrical circuit is
completely insulated from the water circuit. All models are equipped with at least 3 safety equipments.
Ease of use: All models can easily be mounted at any place.
Low heat loss: It is preferred to position water heaters that can be installed anywhere as close to the hot water source
as possible to keep the heat loss in the piping minimum.
Small amount of hot water: In order to avoid unnecessary energy consumption, models with different capacities are
designed for spaces such as kitchen or service room where small amounts yet continuously running hot water is
needed.
2- PROPERTIES OF THE WATER HEATER
2-1 Efficient insulation, low energy consumption
High density, thick polyurethane foam layer offer excellent insulation in all electrical heaters and reduces energy
consumption significantly.
2-2 Drum with long service life
Special process of enameling that protects the tank against corrosive (abrasive) effects of the water and water-soluble
substances. It provides longevity and reliability for the mentioned protection drums.
2-3 Magnesium anode.
By using more magnesium anodes in the products, an electro-chemical anti-corrosive system that prolongs the service
life of the drum is used. In addition, it is positioned to allow easy access to anode drum for control and part
replacement when required.
2-4 High quality heating elements.
Heating coils are manufactured using first-class material to ensure long service life.
2-5 Water temperature control
Products are equipped with a temperature control button that helps to maintain the temperature between 35°C and
85°C. Thanks to this button, every user can select the appropriate water temperature according to requirements and
hence achieve energy savings.
2-6 Thermostat.
Hot water heaters are equipped whit thermostats which guarantee high performance and maximum safety. The
electronic card assumes the function of the thermostat in electronic models.
2-7 Limit thermostat.
Hot water heaters are equipped with "maximum temperature" thermostat. This safety device deactivates the main
thermostat and heating coils in case of a failure.
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 3
2-8 Pressure safety.
Water heaters are equipped with a certified safety valve in terms of pressure values standards. Without the need to
remove discharge pipe, a check-valve is used to drain the unit when required.
2-9 Freezing Safety.
When water temperature in your water heater falls below 5°C, heating resistance is automatically activated and heats
the water up to 16°C. In the meantime, lamps with anti ice and heating coil signs illuminate and indicate the
temperature of the water. The anti-freeze safety system activates while the water heater is in stand-by. Install the
water heater in a location safe from risk of freezing. “This safety system is only available in electronically controlled
models.”
2-10 Bacteria Prevention System.
Researches show that when the water is kept under below 60°C for a long time it will become suitable for bacteria
growth. While the device in stand-by, to prevent bacteria from growing the water is heated at least once a week above
65°C and kept at this level for 1 hour. “This safety system is only available in electronically controlled models.”
2-11 Dry Operation Safety.
If your device is operating without water for any reason whatsoever, the system will be activated automatically and
generate E3 error code in the display. In this case disconnect the device using V-automated switch and ensure that the
water heater is filled with water. After ensuring that it is filled with water reconnect to the mains supply, the water
heater will commence its normal operation. “This safety system is only available in electronically controlled models.”
2-12 Low Voltage Protection.
If voltage is dropped to a level harmful for the device due to mains fluctuations, then the low voltage safety system is
activated and E2 error code is displayed. After the voltage is restored to desired level E2 error will disappear and the
water heater will commence its normal operation. “This safety system is only available in electronically controlled
models.”
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 4
3- TECHNICAL SPECIFICATIONS TABLE
MODEL
UNIT
STANDARD
DIGITAL
TRV 50
TRV 65
TRV 80
TRV 50 E
TRV 65 E
TRV 80 E
CAPACITY
Lt
50
65
80
50
65
80
CONTROL PANEL
-
Thermostat
led
Thermostat
led
Thermostat
led
Digital
Digital
Digital
WATER TEMPERATURE
SETTING RANGE
°C
35-85
35-85
35-85
35-85
35-85
35-85
VOLTAGE
V
230
230
230
230
230
230
CURRENT
A 9 9 9 9 9 9
RESISTANCE POWER
W
1980
1980
1980
1980
1980
1980
OPERATING PRESSURE
Bar/Mpa
8/0,8
8/0,8
8/0,8
8/0,8
8/0,8
8/0,8
SAFETY VALVE MAX.
Bar 9 9 9 9 9 9
WATER CONNECTION
inch
1/2
1/2
1/2
1/2
1/2
1/2
ANTI-BACTERIAL
PROTECTION
- - - - √ √ √
DRY OPERATION SAFETY
- - - - √ √ √
FREEZING CONTROL
- - - - √ √ √
PROTECTION CLASS
-
IPx4
IPx4
IPx4
IPx4
IPx4
IPx4
ANTI-CORROSIVE SYSTEM
Enameled interior drum and magnesium anode
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 5
4- BATCH STOVE ELECTRIC GRAPHICS
4-1 FOR DIGITAL MODELS (SQUARE)
C : KLEMENS
LT : LIMIT THERMOSTAT
T : THERMISTOR
R: HEATING COIL
D: DISPLAY
F : FLANGE
1 : ON / OFF BUTTON
2 : "+" INCREASE BUTTON
3 : "-" DECREASE BUTTON
SOIL
NEUTRAL
FUSE 16A
PHASE
BROWN
BROWN
BLUE
YELLOW/GREEN
BLUE
DISPLAY
GREY
20708417 – ELECTRICAL DIAGRAM (TRM-DIGITAL)
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 6
4-2 FOR DIGITAL MODELS (CYLINDER)
C : CONNECTOR
RLI: RELAY
LT : LIMIT THERMOSTAT
T : THERMISTOR
R : HEATING COIL
BF : BOYNER FLANGE
20812533 – ELECTRICAL DIAGRAM (TRM-ELC. YUV VELK
SOIL
NEUTRAL
FUSE 16A
PHASE
BROWN
BROWN
BLUE
YELLOW/GREEN
BLUE
DISPLAY
GREY
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 7
4-3 FOR MECHANICAL (ANALOG) MODELS
SOIL
NEUTRAL
FUSE 16A
PHASE
BROWN
BROWN
BLUE
YELLOW/GREEN
BLUE
GREY
GREY
C : KLEMENS
LT : LIMIT THERMOSTAT
T : THERMOSTAT
R: HEATING COIL
L : SIGNAL LAMP
F : FLANGE
20850064 – ELECTRICAL DIAGRAM ANALOG TYPE
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 8
5- WATER HEATER COMPONENTS
5-1 DRUM
Water heater is manufactured from steel sheet suitable for enameling. Interior is coated with enamel with waterresistant titanium enamel up to 850°C.
(1) Top dome
(2) Hot water outlet pipe. Depending on the model, different lengths of pipes can be used for hot water outlet. Hot
water always is always received at the top of the tank.
(3) Lower dome
(4) Drum flange
(5) Cold water inlet pipe
(6) Input diffuser. Prevents turbulence and provides cold water inlet from the bottom of the tank.
(7) Drum
TOP DOME
HOT WATER PIPE
LOWER DOME
DRUM FLANGE
COLD WATER PIPE
INPUT DIFFUSER
HOT WATER PIPE
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 9
5-2 OUTER BODY
Water heater outer body is manufactured from sheet with cataphoresis and electrostatic oven-drying and lower and
upper cover parts are manufactured from heat-resistant plastic material.
5-3 INSULATION
Gap between drum and outer body is filled with polyurethane foam with the most suitable density and pressure for
heat insulation.
5-4 HEATING COIL
Outer part of the heating coil is made of stainless steel and inner part is made of heating coil wire and magnesium
oxide insulation. Heating coil flange includes heating coil, thermocouple pipe and anode bar mounting bracket. It can
be in different shapes and powers depending on the model. Mechanical thermostat, electronic thermostat and limit
thermostat thermocouples installed in thermocouple pipe must be secured to the deepest section and a rubber plug
must be mounted at the end to prevent them from falling.
Heating coil measurement method;
Move the level of your measurement device to Ω (ohm) position and measure the resistance. If you can read the
circuit as illustrated, then you need to check if there is any leakage to the body. Contact one of the probes to one
of the ends and other probe to flange gasket. If the value is shown, it is defective, if not it is intact.
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 10
5-5 FLANGE GASKET
Sealing and electrical insulation between tank flange and flange of the heating element is provided by a gasket. In
cases where flange is removed, for example, when thermostat drum scale is cleaned, it must afterwards be replaced.
5-6 THERMOSTAT
Mechanical thermostat is used to set water temperature in desired level. Thermostat is mounted on front display
panel. For the thermostat to detect water temperature, it is placed in the steel pipe in capillary pipe thermocouple
heating coil flange. Thermocouple must be installed in the steel pipe such a way that it is secured to the bottom part.
Signal lamp is lit red while water is heated to temperature that thermostat is set. Signal lamp lights up green when
water reaches the desired temperature.
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 11
Thermostat.
Mechanical thermostat stability control;
Temperature is set in mechanical thermostats by expanding the gas in the bulb and it has an adjustment button.
This button is used to set the temperature value. If the temperature of the water in the water heater is lower than
the set temperature, contact is opened to allow heating coil to start. It has two ends with phases in both. Line is
turned on or off manually or with heat change.
Move the level of your measurement device to Ω (ohm) position and measure the resistance. First, lower the
thermostat adjustment button below the water temperature and contact probes to both ends of the thermostat.
Value must be displayed in the measurement device. If not, it is faulty. When you see the value, measure again by
moving adjustment button above water temperature. The value must disappear. If you see the value, thermostat
is faulty and it must be replaced.
ELECTRONIC THERMOSTAT
Temperature control and some of the safety functions are performed with an electronic card in electronically
controlled water heaters. Electronic card is located on the front panel. To set the temperature, there are two touch
buttons and one on/off touch button. Temperature value, heating coil active, hot water ready, freezing prevention
and bacteria prevention signal leds are located on the display. Electronic thermostat is removed by removing the
screws on both sides in display panel when service cover is removed. The protective lexan film tag in front of the
display must be replaced when it is deformed.
Temperature Adjustment
Button
On-Off signal Lamp
A-MECHANICAL CONTROL
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 12
Water temperature is set to desired value with electronic card. Setting can only be made using the up-down
temperature adjustment keys. At the end of the operation, current temperature in the water heater appears on the
screen. The heating coil active signal lamp on the left side lights up. When water reaches the desired temperature, hot
water ready signal lamp lights up.
Electronic thermostat.
(1) On-Off ButTon
(3) Heating Coil Activation
Lamp
(6) Freezing Safety Lamp
(4) Higher Temperature Setting Button
(5) Lower Temperature Setting Button
(7) Bacteria Prevention Lamp
B-ELECTRONICAL CONTROL
(2) Hot water ready indicator lamp
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 13
Electronic Thermostat Error Codes:
Following codes appear on the electronic card indicator in some error cases.
E1
Thermistor Error
Check the thermistor socket. Replace the
thermistor with a new one.
E2
Low Voltage Warning
When voltage is back to normal, error will
automatically disappear.
E3
Dry operation
When drum is filled with water, and power is
turned off and on, the error will be eliminated.
5-7 LIMIT THERMOSTAT
The limiting thermostat will disable the resistance in case of excessive temperatures in the drum or the failure of
temperature setting thermostat. When limit thermostat trips, check if thermostat is intact. After troubleshooting,
press reset button on limit thermostat to activate again.
Limit thermostat protection values;
1- Circuit cutting temperature is 104 °C.
2- Circuit is cut when gas in the bulb leaks, the product will not operate.
3- When circuit is cut, the red button will come out.
4- When limit thermostat cuts the circuit, water temperature in the drum is decreased to 60°C for reactivation
by pressing the red button.
5- Minimum 30 minutes must pass for limit thermostat to be reactivated.
6- Limit thermostat has a lifespan of 10 trippings.
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 14
Limit thermostat.
Performing controls,
is the most important protection element in the circuit. It allows you to control the increasing pressure depending on
the water temperature. Phase in and phase out and shuts of contacts according to the value measured by the bulb.
Unless water temperature rises to 105°C, it keeps the circuit open at all times. Water must be cooled and minimum
30 minutes must pass for it to be reactivated after tripping. It is checked using measurement device as follows.
Move the level of your measurement device to Ω (ohm) position and measure the resistance.
1- Limit thermostat is constantly active if it is not tripped.
2- If limit thermostat is tripped, red button comes out and breaks the circuit.
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 15
5-8 SAFETY VALVE
Safety valve checks the water pressure in the tank . It provides protection against high pressure and it is activated
when internal pressure exceeds 8 bar. Valve is closed so that it prevents the discharge of thermostat when water
supply is off. Minimum pressure value required to allow valve opening and water inlet is 0,2 bar that is considered to
be equal to 2 m of water height. Safety valve has a latch that opens the valve. This latch can be used for water tank
discharge.
Safety valve is installed on the cold water inlet of the water heater. The following conditions must be observed while
installing and using the safety valve.
1-As water may drip from the drainage tip, this pipe should be left open to the atmosphere. In order to prevent the
dripping waters from causing any harm to the environment, you can connect it to a sewage drain by means of a
discharge hose.
2-The appliance should be operated with intervals pressing the latch in order to prevent caustic lime accumulation
and confirm that it is not blocked.
3-While connecting the safety valve to the appliance, make sure that the drainage tip is downwards.
Methods of protecting the device;
1- Protection 1: Drum pressure is reduced by transferring water to water system if drum pressure exceeds the
system pressure by 0.5-1.
Drain latch safety valve.
2- Protection 2: It is activated when drum pressure exceeds 8 bar. It discharges the water inside through drain
hose to reduce drum pressure.
Pressure rises as water is heated
and water is returned to the
system.
Water received
from the main
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 16
5-9 ANODE STICK
Corrosion is a chemical process that occurs between water heater metal (tank, pipes, heating coils) and water
surrounding it. Corrosion causes punctures in the tank, reduces mechanical resistance of elements and damages
heating element. Reasons that cause corrosion are as follows:
1. Oxygen solution (example: from 5 mg/l at high temperature and up to a maximum of 12 mg/l at low temperature)
2. Salts that harden water.
Magnesium anode is used to prevent tank from punctures.
Corrosion develops in three phases:
1. Water soluble oxygen comes into contact with the inner surface of the drum.
2. Drum iron starts to dissolve (atom loses two electrons and become Fe ++ ion).
3. Iron ion is separated from drum surface and turns into rust by combining with oxygen (FeO). In this case, formation
of punctures start within the tank.
4. Grounding connections must certainly be provided during product installation as floating power connections
prevent chemical reactions between anode and drum and cause corrosion and punctures in the drum.
Both iron and magnesium are water soluble; magnesium is more electropositive compared to iron (become mg ++
more easily). Thus, it is the magnesium that becomes a solution.
At this point, magnesium leaves anode and combines with oxygen atoms. Corrosion ends, in other words, while
thermostat stays the same magnesium anode is abraded.
Water received
from the main
Pressure rises as water is heated. Water is
transferred to drain hose when pressure
exceeds 8 bar.
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VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 17
Service life of the anode depends on water temperature, amount and quality. Anode must be checked and replaced
before it is completely out of service. Recommended duration is to check every two years.
Anode stick
7- OPERATION PRINCIPLE OF WATER HEATER
OPERATION
Tank is always filled with pressurized water. When desired temperature is reached, the control thermostat turns off
the electrical resistance. When hot water is used, cold water intake starts to tank through cold water intake pipe.
Magnesium atom (the
element forming anode)
Magnesium oxide MgO
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 18
Thermostat cools and heating coil is re-activated. Cold water is heated until it reaches the set temperature value in
the thermostat. Water in the tank stays hot and ready for use until more water is drawn.
LAMINATION OF HOT AND COLD WATER LAYERS
Operation principle of a water heater is to create layers that to not mix in different water temperatures.
This principle is extremely simple to explain: water expands when heated and water density is reduced compared to
cold water. In this case, density reduces when water is heated and accumulate at the top of the tank. Water at lower
temperature creates a layer in the lower part.
When hot water is drawn from the top of the tank, this water is replaced by the cold water at the bottom. In this way,
the density balance is provided.
ELECTRICAL WATER HEATER INSTALLATIONS
Service life of a water heater largely depends on the installation to be made correctly. We recommend that installation
must be performed by a professional. The plumber, first of all, must check if water supply, power supply and waste
water connections are in conformity with manufacturer’s recommendations.
Water heater installation and first operation must be performed in accordance with the instructions in the user
manual.
PLACEMENT AND INSTALLATION OF THE UNIT
Attention must be paid to the following issues in the wall-mounting of the stove.
Water heater must be in a position to align with the water connection in the wall.
Dowels and hanger screws should be strong enough. An 80 liter water heater can exceed 100 kg including its
own weight. As this weight will be loaded completely on hanger screws, screws must be strong enough to stay
in the wall.
After hanging, it is ensured that the device is parallel to the wall using the adjustment plastic section at the
bottom of the stove.
There must be no damage on the device that will adversely affect the electrical isolation.
Power cable of the device must be connected to the fuse supplied with the device.
Safety valve is must be mounted to the cold water inlet pipe with blue ring.
Water connection hose sleeves have flexible gaskets. Sleeves must be sufficiently tightened to prevent water
leakage. If extremely tightened, sleeves and gaskets may be damaged. If hose length is not sufficient, different
sizes of hoses recommended by Vestel Service Center must be used.
Water heater must be installed where water inside will not freeze.
6- WATER HEATER MAINTENANCE
CLEANING SCALE ON HEATING COIL
Scale (scaling) can lead to operating problems mentioned below:
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 19
Reduction in the volume of available hot water
Increase in heating coil failure risk
Noisy water heater operation during heating
Thermostat turning on-off frequently
Therefore, water heater cleaning is required in frequency depending on the quality of the water and use of the
appliance. Recommended cleaning period is at least once in two years.
.
Operation:
1. Be sure to disconnect electrical connection before clearing the water heater.
2. Turn off the valve to cut water delivered to the appliance.
3. To eliminate the pressure, turn on hot water tap and then turn off.
4. Disconnect intake pipe water system connections.
5. Remove safety valve and connect a rubber pipe the appropriate length for the discharge.
6. Open hot water tap for the discharge of remaining water in the water heater.
7. Remove the screws that holds the flange (that heating coil is connected).
8. Remove the flange.
9. Clean the scale manually or using a tool (depending on appliance type) carefully.
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 20
10. The magnesium anode stick must be replaced every 2 years.
11. Flange gasket must be replaced every time heating coil is removed from the drum.
FLANGE GASKET
FLANGE
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 21
7- ERROR CODES AND TROUBLESHOOTING
A- ERROR CODES
E1
Thermistor Error
Check the thermistor socket. Replace the
thermistor with a new one.
E2
Low Voltage Warning
When voltage is back to normal, error will
automatically disappear.
E3
Dry operation
When drum is filled with water, and power is
turned off and on, the error will be eliminated.
B- TROUBLESHOOTING
E1 ERROR
This is an error code that occurs only in digital models. It means that temperature sensor is open or there is short
circuit.
Check the sensor and electronic card
sockets, is there looseness or lack of
contact?
Yes
Fix lack of contact in
sockets and start
again
No
Remove sensor and electronic card
and measure resistance values. Is
there open or short circuit?
Yes
Replace Sensor.
Replace electronic
card.
No
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 22
E2 ERROR
This is low-high voltage error in digital water heaters. Its protection range is between 165-270V.
E3 ERROR
This is dry operation warning in digital water heaters. If temperature of the water is increased by 1°C in 5 seconds,
it means that water level is low.
Measure supply voltage of the bath
stove, is it out of limits?
Yes
It is a normal process. Card
protection is running, wait for
the voltage to balance.
No
Replace electronic
card.
Open hot water line of bath stove, is
there air release?
No
Increase bath stove thermostat
temperature, does water
temperature rise faster than
normal?
Yes
Bath stove water level is low, fill
it with water and start again.
Yes
No
Replace the control card.
Heating coil is excessively scaled or sensor slot is very
close to the source of heat. Replace the scaled heating
coil or move the sensor slot away from heating coil.
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 23
WATER HEATER NOT WORKING
Turn on V-automate and measure
the voltage. Is there power supply in
No
Yes
V-automate is tripped or broken. Install
again, and replace if it does not work.
Check supply cable. Is it defective?
Yes
Replace supply
cable.
No
Is limit thermostat tripped?
Yes
Cool the water in the drum
and reinstall limit thermostat.
No
No
Check temperature
thermostat. Is output
provided to heating coil?
Yes
Replace thermostat
Check the
heating coil and
replace if
defective.
Check bath stove cable harness. Is
there burning, tearing or lack of
contact?
Yes
Replace cable
harness.
No
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 24
SAFETY VALVE LEAKING WATER
LIMIT THERMOSTAT TRIPS FREQUENTLY
Connect a manometer to water
outlet pipe of the appliance and
measure drum pressure. Is the
No
Yes
Replace the safety valve
Cut 5 cm of chrome hot water pipe
and reinstall. Does the problem
persist?
No
Yes
Fault is fixed. No need for
further actions.
Mains water system pressure is
too high. Recommend pressure
reduction regulators for the
safety of the customer and the
Is the water drawn from the device
over 90°C ?
No
Yes
Remove heating coil
from drum. Does the
sensor slot that limit
thermostat bulb is
inserted contact the
end of heating coil?
Yes
Remove
heating coil
slot from
sensor slot and
reinstall.
No
Replace limit
thermostat.
Remove sensor from control card
and perform measurements. Is there
any deviation in sensor values?
Yes
Replace
Sensor.
Thermostat is faulty, replace it.
No
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VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 25
WATER HEATER DOES NOT HEAT WATER
Do the display or LEDs illuminate
when on/off button of digital or
mechanical bath stove is pressed?
No
Yes
Check supply, V-Automate,
limit thermostat of the device.
Does thermostat output to
heating coil?
No
Yes
Replace the thermostat.
Check heating coil resistance
values. Are there any broken
cables or short circuit?
Yes
Replace heating coil.
No
Are sensors and bulbs are
correctly fit in their slots?
No
Fix sensors and bulbs and place
them back.
Yes
Hot water pipe is not mounted or
fell inside the appliance. Fix and
start the appliance.
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OTHER MALFUNCTIONS
MALFUNCTION
CAUSE OF MALFUNCTION
TROUBLESHOOTING
Insufficient hot water.
* Hot/cold water pipe connection
may be blocked.
* Connections may be incorrect.
* Connect the pipes correctly.
* Ensure that the system conforms to
the schema.
Formation of excessive hot
water or steam.
* Thermostat setting may be
incorrect or it may be stuck.
* There may be formation of scale
deposits or mud in the tank.
* Adjust the thermostat setting
correctly or replace thermostat.
* Clean scale or mud.
It takes a long time for the
thermostat to start again.
* Thermostat sensor and drum
connection may be irregular.
* Thermostat sensitivity may be
lost.
* Place the thermostat sensor
correctly.
* Replace the thermostat with a new
one.
Heating time is long, energy
consumption is high water
heater cannot reach
maximum temperature.
* There may be leakage in hot
water system.
* Heating coil may be
malfunctioning.
* Detect and repair the leak.
* Replace heating coil.
Hot water drawn from water
heater smells bad.
* Bacteria may have grown in
water heater due to infrequent
use.
* Completely drain and clean the
water in water heater.
Water heater is
enabled/disabled
frequently.
* Thermostat may be faulty.
* Heating coil may be covered
with scale.
* There may be faulty power
input.
* Replace the thermostat.
* Clean heating coil.
* Check the supply voltage.
Page 28
VESTEL WATER HEATER SERVICE MANUAL
VESTEL BEYAZ EŞYA A.Ş. (Air Conditioning Quality Assurance Department) Page 27
MALFUNCTION
CAUSE OF MALFUNCTION
TROUBLESHOOTING
Water heater is making noise
during heating.
* Heating coil may be covered
with scale.
* It may be the boiling sound of
water while heating coil is
heating.
* Clean heating coil.
* It is a normal process. There is no
need for further actions.
There is water leak in heating
coil and flange unit
* Flange or heating coil gaskets
may be damaged.
* Corrosion may have caused
puncture in flange.
* Replace gaskets.
* Replace flange and gaskets (mount
the flange carefully in both cases).
NOTE: Temperature control is electronic in certain models of water heaters. For this reason, thermostat used for
heat control is digital. It detects heat through a sensor.
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