The microwave oven has long ceased to be a primitive device for quickly heating food. Modern models boast a wide range of all sorts of functions, as well as the presence of cooking modes on the grill and convection, which makes such appliances an excellent alternative to more expensive electric ovens. Equally important is the safety of operation, for which a number of functions are provided, including automatic shut-off, a lock, commonly called “child-proof”, and multi-glazed door.
If the line indicator light is actively peeling or dyeing any inside the cavity of the oven (including under the turntable) stop using the microwave and replace it. Microwave ovens are beyond repair. Accidental ingestion of a small amount of peel-off coating poses no health hazard.
An average microwave should last about ten years. While from Panasonic standard warranty covers you for one year, there is also an implied warranty this says that the device will last much longer. and that in the event of a breakdown, you can count on the company to quickly repair it.
How to eliminate typical breakdowns of microwave oven
Part of the typical malfunctions and abnormal behavior of the microwave oven can be eliminated by the user. However, it is worth noting that this will require some skills in the use of measuring equipment and basic care during disassembly and assembly of the oven. A basic knowledge of electrical circuits is not unreasonable. And, of course, all work should be carried out only with the oven power off. That is, it needs to be physically de-energized by pulling the plug out of a 220v outlet.
Microwave oven does not turn on
It is impossible to repair the power control unit without special skills. We recommend that you contact your nearest electrician to carry out the necessary work. But some checks can be done by the user.
- The socket is being tested. You can simply plug another appliance into it. If there is no power, you need to fix the problem.
- Examine the power supply unit of the microwave oven. For this purpose it is necessary to open the case of the device. There is a fuse on the board in special terminals. It should be inspected and checked for conductivity. If a component is burned out, it can be tried to be replaced.
Important! This should be done using the same brand of fuse. It is categorically not recommended to install parts with a large nominal current actuation.
When there is power in the socket and the fuse has been checked or replaced, you can try heating a glass of water in the microwave. If it still does not work, then the problem will have to be repaired at a service center.
Microwave oven fails to operate in the preset mode
It happens that the microwave does not turn off after the timer ends, does not start or stops working right in the course of the heating cycle. This most often indicates malfunctioning of the door micro-switches. There is more than one. For simple repair in domestic conditions, the door can be carefully dismantled and if necessary the contact groups of micro-switches can be cleaned.
Another problem causing failure in execution of the set mode may be caused by malfunction in the power transformer power control relay. This element is unrepairable. If on testing the contacts there are positions with faulty tripping, the relay must be replaced as a whole.
The most difficult situation when malfunctions are caused by a fault in the control unit. They can be eliminated either in the service center or by replacing the module completely with a new one.
The device does not heat properly
In case of mains power failure it is normal that the microwave oven does not heat up very high. This is common in homes in rural areas or in areas with congested power systems. Already at voltage of 205V in the socket there is a sharp drop in the intensity of radiation of the magnetron.
But if the mains voltage is normal, you should test the power elements of the microwave power system. It is also worth recalling the time during which the microwave oven is in use. If it is measured in a few years, and the drop in heating intensity all this time has been gradual, then simply burns out the magnetron bulb. This element has a finite life and must be replaced.
Microwave won’t heat
With a working control panel, starting timers and modes, the microwave does not heat only if there is a problem in the power system.
- Check voltage on the primary winding of the magnetron power transformer. If it is absent, it is necessary to repair the control module.
- If there is voltage on the primary winding, check all the key points of the shaping system. Namely, the functionality of the transformer, the characteristics of capacitors, diodes, magnetron.
- The transformer is tested by measuring the conductivity of the primary and secondary windings. If their resistance is close to zero, there was a short circuit between the coils. If to infinity. breakage.
About how to check the characteristics of capacitors and diodes, knows any person who knows how to use a multimeter. With testing of magnetron it is more complicated. Do several tests.
The first one refers to the bulb. If when you check the resistance of its filament multimeter shows an extremely low value of the parameter, with the element all is well. Otherwise, inspect the filter coils, contacts of their mounting.
If everything is ok there too. magnetron has to be replaced. On the necessity of such action will indicate and check the through-capacitance, when the resistance when touching the one probe of multimeter to the body and the other to the contact resistance is not close to infinity.
HOW TO LOCK AND UNLOCK MICROWAVE / SAFETY FOR KIDS / SHER SHARES
If sparks are appearing, there is a break in the insulation of the oven. This means that the mica plate covering the window of the magnetron has burned through. Or the nozzle cover that rotates the glass tray is broken. It may also be that the user is using the wrong utensils. Sparks on metal bowls, forks and spoons left in the plate are normal. Keep in mind that parts made of conductive alloys must not be put in the microwave.
The tray doesn’t turn
The drip tray drive system is simple enough. If it doesn’t work, it could be stuck. This is checked manually, by turning the plate. There can also be a breakage of contacts to the motor. The most complicated problem is a broken gearbox. There’s no point in fixing it, it’s cheaper to buy a new assembly.
The device does not respond to the control panel commands
If we are talking about a model with mechanical switches. all of them are subject to mandatory cleaning, inspection, replacement of faulty elements. In microwave ovens with electronic control, no reaction means a breakdown in the power control module.
Display does not work
Control module is responsible for display operation in microwave oven. There is only one culprit.
Fuse blows when the door is closed
Such a problem indicates a short circuit of the control circuits. Cause is micro-switches in the door. If one of them is stuck, there may be a short circuit. Repair is quite simple: the door must be disassembled and all micro-switches must be checked.
Thus, the list of possible malfunctions that can befall your microwave oven is quite extensive. With some failures can be managed independently and without much effort, and failure of individual elements, repair or replacement of which involves a certain risk and complexity, requires the attention of professionals. Microwave oven can serve you for many years, if you use it properly, following all the rules, and in time to pay attention to the slightest failure in the system.
Microwave oven control
(1) Display window (2) Power button (3) Time button (4) Auto-heat by weight button (5) Auto-cook by weight button (6) Auto-defrost by weight button (7) Timer/hour button (8) Weight selection buttons (9) Stop/reset button. During cooking: One touch stops the cooking process. A second press resets all commands and a colon appears on the display (10) Start button
The operation of this microwave is quite complex and not intuitive. This is due in part to the complicated modes shown on the display. Nevertheless, simple operations, such as heating food, do not cause difficulties.
The microwave oven locking device, is a very complex and precise mechanism that is an element of interaction with the oven door and performs two functions. One of the functions of the lock the door, we discussed in a previous article, and in this article we will talk about the function blocking the oven when the door is open.
Figure 1 shows an exterior view of one of the locking device designs. The load carrying structure is made of plastic, has a very specific configuration that fits the specific oven model and contains a variety of accessories.
The locking mechanism is a set of micro-switches placed on the carrier element of the locking device. The number of micro-switches may vary and depends on the circuit design applied in a particular oven model, but not less than three. The micro-switches are positioned in such a way that when the door is locked, the deadbolt presses against the switch buttons, causing them to trip. When tripped the relays switch the various circuits that power the microwave. All micro-switches must operate in sync with each other or in a specific sequence to ensure proper switching. Misalignment in the operation of the elements of the locking mechanism, when opening and closing the door, can cause a short circuit in the oven power supply circuit, which in turn leads to failure of the mains fuse.
In order to further understand the work of the locking system, consider the simplest version of the design containing three micro-switches. Figure 2 shows a schematic diagram of a microwave oven. The micro-switches of the interlock system are labeled as interlock keys A, B and C, and are the same as in picture 1. All three switches are connected by a dotted line, indicating that they must operate in sync.
Keys A and C are micro-switches with normally open contacts and have two pins each. If the button of such a switch is not pressed the contacts are broken, if the button is pressed the contacts are closed. Key B. switching, has three pins. One of the pins is middle and, depending on the position of the button, it is shorted to the upper or lower pin of the switch. In the diagram, the position of the switch contacts corresponds to the closed door position. In order to start the oven in microwave operation, it is necessary to close the power supply circuit of the high voltage transformer, i.e.е. apply voltage to its primary winding. For ease of explanation, we will not consider the power supply circuits of the electric motors of the turntable and the fan M1 and M2. Let’s look at the transformer power supply circuit only. For this purpose, we shall conditionally divide this circuit into upper and lower supply busses and mark the direction of current flow in the circuit (indicated by red arrows in the diagram). So if you press the start button with the microwave door closed two relays are activated on the control panel, one main relay and one magnetron relay. With their contacts they will close the power supply circuit on the lower bus. The circuit current flows as follows: mains, line filter elements, thermal fuse of the upper busbar, interlock switch A, interlock switch B, high voltage transformer primary winding, magnetron relay contacts. KM, main relay contacts, thermal fuse of the lower busbar, line filter elements, mains. In order to stop the oven, just open the circuit of high-voltage transformer power on any of the rails. If the door is opened when the oven is operating, the lockout system will trip. The key A will open the circuit of power on the upper bus. Key B closes the upper bus to the lower bus (this is to damp transients that occur in the circuit when the power is removed). Key C, by opening its contacts, will let the controller on the control panel know that the door is open. The controller, in turn, will deactivate the magnetron relay by this signal, which will break the supply circuit on the lower bus. The oven will stop operating and the control buttons on the panel will be locked. Main relay contacts will remain closed and will carry current through the circuit that supplies the backlight bulb.
Now close the door. When the door closes, keys A and B will allow the upper bus current to flow. Key C will signal to the control panel that the door is closed. The controller will deactivate the main relay and the light bulb goes out. When the start button is pressed, the controller will activate both relays, the circuit will close, and the oven will resume its operation.
The micro-switches are fixed to the supporting element of the locking device with cylindrical pins threaded through the mounting holes provided in the switch body. The switches are locked in place with latches. To remove the micro-switch from its seat, bend the plastic tabs to the sides and remove the switch from its pins. The designs of locking devices can be very different and contain a varying number of micro-switches and auxiliary elements. It depends on the design of the particular oven model and its circuit solutions. The closing device shown in picture 1 is one example. Its features are such that the bolt directly presses only the key button C, and the key buttons A and B are acted on by the bolt lever, which is the auxiliary element.
Inside the oven, the locking device is located in a rather narrow slot between the control panel and the chamber wall (Fig. 3). The supporting element of the locking device contains fixing holes and guides (picture 1. upper right corner). To ensure reliable fixation of the supporting element in its place, the rails are inserted into special slots in the furnace body. To fix the locking device with self-tapping screws, the fixing holes of the supporting element must align with the mounting holes in the oven body. In some microwave models, the mounting holes in the body of the oven are oblong instead of round. This allows you, within a small range, to move the locking device vertically and thus helps to find the best position of the key lock in relation to the door bolt.
One of the most common malfunctions of this microwave oven unit in practice is contact jamming of the micro-switches. In fact, when opening the door when the oven is working, the contacts of switches have to break the power supply circuit, through which a significant current flows. Sparks are inevitably arising, the contact surface gradually burns out and this leads to contact sticking or complete burnout.
Another common malfunction is mechanical damage to the transom. This often happens when a low quality plastic is used for the manufacture of the transom. This material loses its elasticity and strength over time. The plastic that has lost these properties cannot withstand the mechanical stresses that act on the transom when the door is opened and closed, causing one of the transom tongues to break off.
Microwave oven behavior in case of these malfunctions also depends on the circuitry used in it. The oven may not turn on at all, may not respond to pressing buttons on the control panel, or may simply not turn on certain parts of the microwave. For example, it can hum, giving the appearance of working, but not warming up the food.
Attention is important! Judging by the content of search phrases on the Internet, there are many people who want to turn off the oven lock. I would not recommend this. Remember that there are consequences. Microwave oven operation with the door open, can harm your health and the health of those around you.
Panasonic microwave ovens
Hi. Panasonic NN-CS596S microwave oven stops working by itself. If you press a little bit on the corner of the door where the button is, it continues to work. And so all.
The encoder in the microwave oven does not work more than a month ago Panasonic NN-SD361M microwave oven
Hello. There were power surges in the network, after which (not necessarily related, since before the microwave Panasonic NN-SD361M long does not.
Microwave oven continues to work after over 2 months ago Panasonic NN-GD576M Microwave Oven
Hello. After the microwave oven Panasonic NN-GD576M continues to work for some time after the program is finished, why does this happen??
The microwave oven Panasonic NN-GT548M does not turn off for more than 3 months
Good Morning. After the siren about the end of the program sounds, when you open the door in Panasonic NN-GT548M microwave oven, the plate.
Microwave oven stopped working more than 6 months ago Microwave ovens Panasonic NN-GT352W
Good evening to all! When I plugged in, something clicked in the microwave oven Panasonic NN-GT352W and it did not turn on again. Thought the fuse.
Microwave oven does not spin the plate more than 6 months ago Microwave ovens Panasonic NN-G315WF
Hello! Microwave oven Panasonic NN-G315WF works, heats, but the plate does not spin, the cause is most likely in the corresponding motor.
Microwave oven does not start more than 6 months ago Microwave oven Panasonic NN-GT370M
Hello. Microwave Panasonic NN-GT-370M, after setting the time press start, the countdown starts, but the microwave itself does not.
Microwave ovens Panasonic NN-GD462M microwave oven lamp more than a year ago
Good evening. I have a Panasonic NN-GD462M microwave oven. Bulb burned out, according to the manual it is Z612E9X70EP. But they are not on sale (I buy them in.
The time is not set more than one year ago Microwave ovens Panasonic NN-CS596S
Good evening. Panasonic NN-CS596S microwave oven, does not set the functions for which the bottom knob-twist is responsible (setting.
Microwave ovens Panasonic NN-DS592M Microwave oven display is jumping back and forth over a year ago
Good Morning. Panasonic NN-DS592M Microwave oven. When turning the knob to select the weight of the food, the numbers jump back and forth, it is impossible to.
Microwave oven spins plate after cooking more than a year ago Microwave ovens Panasonic NN-K575M
Good day. Panasonic NN-K575M microwave oven keeps spinning the plate after cooking or heating a dish. After expiration of time.
Replacing the transformer in the microwave more than a year ago Panasonic NN-S587W microwave ovens
Hello! When replacing the thermal fuse on the Panasonic NN-S587W microwave step-down transformer, the winding was damaged. Marking ETP41KCN81QN.
Microwave oven does not turn on cause more than a year ago Panasonic NN-CS596S Microwave ovens
Hello. After a power surge in the electrical system, the fuse needs to be unplugged. Panasonic NN-CS596S Microwave stops working. With the plug inserted into the socket, does not.
The microwave oven broke down more than a year ago Panasonic NN-GD376S Microwave ovens
Hello. The problem is this. Panasonic NN-GD376S oven was working fine, then I started noticing clicks when working, and then the oven.
The steam generator in the microwave oven does not work more than one year ago Panasonic NN-CS596S Microwave Oven
Afternoon. Panasonic NN-CS596S microwave oven gives out error U14. Pour water into the steam generator, but there is water in it! However, it still gives out.
Microwave does not work start button over a year ago Microwave oven Panasonic NN-CS596S
Hello. Panasonic NN-CS596S microwave has cooking programs entered, time, power, etc.д. install. At the end of the.
Panasonic NN-DS592M microwave oven does not work more than a year ago Panasonic NN-DS592M microwave oven
Hello. The problem looks like this: After plugging in the microwave oven the numbers 88:88 appear on the display. When turning the knob or.
Microwave oven stopped working over a year ago Panasonic NN-DS592M Microwave Ovens
Afternoon. Panasonic NN-DS592M microwave oven does not turn on and does not respond to anything, what is the problem?
Microwave oven does not work over a year ago Microwave ovens Panasonic NN-GD577M
Touch panel does not work, power to the panel is on. A light bulb burned out, but the microwave oven was working, now and.
Microwave oven says drain tray u12 and does not work over a year ago Microwave ovens Panasonic NN-CS596S
There was an odor. New. Heated twice. Then when programming began to show u12, to decipher means to set.
Mica pad burned through
This malfunction is most often manifested by sparks inside the chamber. Burning of the mica pad has practically no effect on the oven heating efficiency, but further use of the device may cause more serious damage. To carry out the repair of this malfunction is quite simple.
It is enough to cut out a new mica plate of the appropriate size and install it in place of the damaged part.
Microwave oven Candy CMXG 30 DS
Microwave oven Candy CMXW 30DS with a capacity of 30 liters has 5 power levels and 40 automatic programs that allow you to select the cooking mode for any dish. Child lock, silent operation, baby and healthy eating modes make this model even more convenient and useful. The parameters of the appliance and the remaining time to the end of the selected program are shown on the built-in display. The device has a capacious chamber, coated on the inside with high-quality enamel. It is durable and resistant to high temperatures.
- ease of operation
- defrosting quality
- easy to clean
- additional functions
ALL your microwave can have two types of fuse, the fuse fishing line is usually a familiar ceramic tube about 1 inch (3 cm) long. Temperature cutoff fuses are usually squat black cylinders with two prongs on one side. Their exact location depends on your model, but check behind the control panel.
For one year from the date of purchase, if this unit is operated and maintained in accordance with the instructions supplied with the product or supplied with the product, Jacuzzi Corporation will pay for FSP replacement parts and repair costs to correct defects in materials or workmanship.