usha 3250 User manual

ELECTRIC PRESSURE COOKER
Model - 3250
INSTRUCTION MANUAL

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Dear Customer,
Congratulations!
You are now the proud owner of Usha Electric Pressure Cooker.
Innovatively designed, using only the highest quality material and
components, your Usha Electric Pressure Cooker is designed for years of
trouble free performance.
Please read this Instruction Manual carefully before using and keep it
cautiously after reading for future reference.
Best Wishes

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PRODUCT INTRODUCTION
Usha electric pressure cooker is a kind of new cooking utensil developed with the latest
technology, not only boasts the merits of ordinary pressure cookers, electric rice cookers
and stewing cookers, but abandons the shortcomings of them. It enjoys stylish appearance
and advanced structure, is safe for use, easy operable, multifunctional and energy saving,
thus ideal for modern families.
Advantages:
1. Compared to electric rice cookers, it runs quicker, saves time and electricity during
rice cooking and soup.
2. Compared to ordinary pressure cookers, its safer and reliable due to the adoption
of ten safety devices, thoroughly solves the safety issues during cooking under
pressure.
3. Compared to the stewing cookers, its saves more time, and is automatically
adjustable according to individuals taste, is a universal cooker.
4. Compared to microwave ovens, its better for food nutrition preservation, not remove
food moisture and no potential risk of radiation.
SAFETY DEVICES
The cooker is equipped with ten safety devices: (Fig. 1)
1. Cover opening/closing safety device - No pressure in case of poor engagement
between the cover and cooker body; no covering in case of pressure in the cooker.
2. Anti-overfilling sealing device - A silicon seal ring is provided in the cover, boasts
dual round corner structure, is able to expand and tightly attach the cover and the
inner cooker under heat, and prevents overfilling in the scope of safe pressure.
3. Pressure control safety device - Upon given pressure is exceeded during use, power is
cut out automatically, to keep pressure in the scope of safe pressure.
4. Pressure limit safety device - It’s able to exhaust air via the pressure limiting valve
when the temperature and pressure control devices of the cooker fail and the
maximum working pressure is exceeded.
5. Scalding preventing handle device - No hand scalding during operating the pressure
limiting valve. Be careful to have hands off the exhaust valve during operation.
6. Anti-blockage safety device - It’s designed to prevent food from clogging the air vent
and ensure smooth air discharge.

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7. Pressure relief safety device: An elastic support mechanism is provided at the bottom
of the heating plate. When all above devices fail and the inside pressure reaches the
limit, the inner cooker will move downward automatically to make it away from the
seal ring, and release pressure to prevent any risk.
8. Heat maintenance safety device - A heat maintenance switch is designed, to keep
inside temperature within 600C-800C, with temperature maintenance time up to 6
hours, will retaining food nutrition.
9. Temperature limiting safety device - It’s able to cut out power when the inner cooker
is emptily heated or exceeds the given temperature, is able to reset automatically
after temperature drop.
10. Over-temperature power-cut device - It cuts out power supply when the inside
temperature rises to the limit value, and can not reset automatically.
PARTS LIST

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OPERATION INSTRUCTIONS
1. Uncover: Firstly hold the cover handle tightly, turn the cover clockwise, and then raise
it up. (See Fig. 3, 4)
2. Take out the inner cooker and fill food in it. The amount of food shall not be more than
4/5 of inner cooker height (4L: 3/4: 6L), and expansible food such as bean shall not be
more than 3/5 of inner cooker height (4L: 1/4, 6L); the inner cooker shall not used to wash
rice to prevent scratch. (See Fig. 5, 6 and 7)
3. In cooking rice, the cookers with volumes 4L,5L and 6L correspond to maximum rice
amount of 8 cups, 10 cups and 12 cups, with water and rice ratio about 1:1; in cooking
congee, the ratio of water and rice is about 8:1. Of course the ratio is changeable to
personal favor or cooking experience.
4. Put the inner cooker into the heat maintenance hood. Before doing it, wipe the bottom
of the inner cooker and the heating plate clean, free from any impurity; after the inner
cooker is put, turn it left-right slightly and ensure it well contacts the heating plate.
5. Close the cover. Before closing the cover, ensure the seal ring has been put into the
steel ring inside the cover, and then turn the seal ring in a left - right way, ensure it stays
on the steel ring uniformly; then hold the cover handle tight and move to the limiter; turn
the cover counterclockwise to the engagement position and hear the “click’’ locking sound.

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Volume 4 L 5L 6L
Inner cooker scale/
Time (minute)/Function 2 5 8 2 6 10 4 8 12
Rice 20 35 45 20 35 45 20 35 45
Meat 40 40 40
Chicken soup 60 60 60
Beans 60 60 60
6. Put the pressure limiting valve on the exhaust
tube, turn it and ensure the “sealing’’ and handle
position in correspondence with the handle
direction, and check and ensure the float valve
falls. (See Fig. 9 and 10)
7. Switch on the power supply, with heating light
on. (The light will be off in a moment if no cooking
function is set, and the heat maintenance light is
on, indicating the heat maintenance status.)
8. Set pressure preservation time according to
the food referring to the “guide of cooking’’
COOKING GUIDE
The cooking and cooling times of different functions vary. The cooking time may change
slightly according to voltage, amount of food and water, quality of water and rice; the more
the cooking amount, the longer is the time of the cooking. The cooking times listed are
for reference only:
Kind tips: *It’s normal that the knob turns or not during cooking
*It’s normal that “click, click” sounds are heard during cooking, needs no worry.
*In small amount cooking, the inner cooker may be sucked up during uncovering. Please
shake the cover and make the inner cooker fall prior to uncovering.

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9. Turn the knob clockwise to the scale of corresponding function (See
Fig. 11), with heating light on to start heating. E.g. for cooking, turn the knob to the cooking
function; air pressure generates after cooked for some time, and the float valve rises to
lock the cooker cover. No uncovering can be done at this moment (compulsory uncovering
is prohibited). Note: It’s normal that a little steam is given off in this course.
Upon reaching the working pressure, it turns to the pressure preservation status
automatically. The pressure preservation countdown starts, and the knob turns
counterclockwise. When the knob goes to the OFF position, the cooking is completed,
and the heat maintenance light is on, indicating the heat maintenance status. (See Fig. 11)
For example, in cooking, the knob will turn counterclockwise to the OFF position,
indicating the completion of cooking.
*In the heat maintenance status, if continuous heat maintenance is not necessary, the
power cord can be drawn out of the socket.
10. Upon opening the cover to take food,
turn the pressure limiting valve to the
“exhaust’’ position at first, namely the
“exhaust’’ position corresponds to the
handle direction; exhaust air till the float
valve drops. (See Fig. 12, 13)
*In cooking liquid foods (congee or
viscous liquid), the pressure limiting valve
shall not be operated to exhaust air unit
the cooker is naturally cooled down and
the float valve drops, otherwise the food
may eject out of the exhaust tube. It’s acceptable to speed up the cooling by covering the
cooker with a wet towel.
*Draw out the power plug.
*Hold the cove handle
tight, turn the cover
clockwise to the border of
the limiter, and then arise it
up and take the food.
CLEANING AND MAINTENANCE
1. Please draw out the power plug before cleaning.
2. After using, take out the inner cooker and the cover and clean them with neutral
cleanser, then flush with clean water and wipe them dry with a dry soft cloth.
Heating light is on
Heat maintenance light is on
Fig. 12

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*Cleaning of anti-blockage hood: after each use, flush the anti-blockage hood directly, to
its cleaning; ensure the anti-blockage hood and the exhaust tube are not blocked. (Fig. 16)
4. After each use, pour the water out the water box and clean it, then wipe it dry and fit
again. (Fig. 17)
5. Wipe the cooker clean with a rub. It’s
prohibited to soak it into water or sprinkle it.
6. It’s prohibited to wipe the inner cooker with
metal wire or other rough or rigid tools, to
prevent scratch of the non-sticky coat on the
wall.
*Cleaning of float valve: slightly move the float
valve core up or down, and then flush away the food residue on the seal ring of the float
valve. (Fig. 18)
*Cleaning of pressure limiting valve: raise and take out the pressure limiting valve; wash
it with fresh water; then return it to the valve seat again. (Fig. 19)
3. Following cover parts shall be cleaned: seal ring, pressure limiting valve, anti-blockage
hood, exhaust tube and float valve.
*Cleaning of seal ring: take the seal ring out of the steel ring, clean it and then fit it again.
After that, check and ensure the clearance between seal ring and cover border is uniform
and the cover may turn freely. (Fig. 14, 15)
7. When the cooker is not used, please wipe it dry, pack it and put in a dry ;lace for
storage.

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IMPORTANT PRECAUTIONS
1. The product belongs to Category I electric appliances, requires the power supply
is connected to earth wire; dedicated power plug is required without change; the
socket shall be fixed one, at least 10A and 250V.
2. During movement, please don’t hold the cover handle, to prevent the cover breaking
off, but hold the cooker tags with both hands.
3. Please use the cooker strictly based on the User Manual. It’s prohibited to use it in
the inflammable, explosive or wet environment.
4. Please be careful not to damage the seal ring. Don’t replace the seal ring with other
rubber ring or enhance sealing using any tension ring. The damaged seal ring can
only be replaced by the service stations that we authorize, not by users themselves.
5. The anti-blockage hood shall be cleaned often; and both the exhaust valve and float
valve shall be kept smooth.
6. It’s prohibited to uncover prior to the drop of the float valve.
7. No heavy object is allowed on the pressure limiting valve, or replaced by other
objects.
8. It’s prohibited to block the space between the cover and the inner cooker.
9. Please try to use wood or plastic meal spoon due to the non-sticky coat on the wall of
the inner cooker.
10. The inner cooker shall not be directly heated by other stoves or replaced by other
vessels.
11. Upon exhausting from the pressure limiting valve, don’t have hand or face approach
the valve, to prevent scalding.
12. Please don’t touch the cooker in its working, to prevent from any sort of accident.
13. No child is allowed to approach the electric pressure cooker in its working.
14. The longest heat maintenance time is 8 hours; the use time shall not be more than 6
hours, to prevent impairment of the cooking effect.
15. If any abnormal condition is found during use, please immediately draw out the
plug, and contact our service station for repair. Arbitrary detachment or replacing
parts with other parts is prohibited. Only our own parts and accessories can be used,
otherwise we’ 11 bear no responsibility for all serious results caused thereto.
16. The power cord is dedicated for the cooker, must be replaced arbitrarily. The
damaged power cord shall be replaced by competent persons in local service station.
TECHNICAL PARAMETERS
Model Voltage Power Volume Size Working
Pressure
Pressure
Limit
Heat
Maintenance
Pressure
Preservation
3250 220-240 V
AC, 50 Hz 800 W 4 L 22 cm 0-70 KPa 90 KPa 60-80oC 0-30 min

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SCHEMATIC WIRING DIAGRAM
TROUBLESHOOTING GUIDE
*If following abnormal condition are found during use, they may not be the product
failures. Please carefully check the cooker prior to sending to repair.
Phenomena Possible Causes Solutions
Indicator light not on Power supply not connected
*Is power off?
*Is plug breaking off?
*Is switch on?
Hard to cover *Seal ring error
*Push rod clipped by float
Press the float valve with a
chopstick
Air leak from cover
*Cover is not put to its position
*Seal ring is not used
*Food residure stains the seal ring
*Seal ring is worn
*Close the cover correctly
*Put seal ring into it
Clean the seal ring
Change the seal ring
Float valve leak
*Food residue stains the seal ring of the
float valve
*Seal ring of the float valve is worn
*Clean the seal ring of the float
valve
*Replace the seal ring of the
float valve
Float valve fails to rise
*Pressure limiting valve is not at ‘’seal’’
position
*Too little food and water inside the
cooker
*Cooker or pressure limiting valve leaks
*Draw it to the correct position
*Put food and water as
specified
*Send to repair
Automatic heat
maintenance fails Heat maintenance parts damaged Send to repair
The case feels biting Electric leakage Send to repair
If no solution is obtained above checking, please immediately contact over
service centre