Question about Engel Refrigerators

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Is it ok to supply modified square sine wave 240 volt AC power to my Engel fridge? The fridge goes well on pure sine wave, but this inverter is dedicated to other uses. I have plenty of power (solar)

I've had mysterious problems with the 12 volt power feed of the fridge (which refuse to be fixed - this is the third time it has failed). I have replaced the 12 volt power lead, checked the battery and its been into the repair shop - which found no problem, but the fridge will no longer go on 12 volts now. I wish to circumvent this problem by having permanent 240 volt power to it. this would also provide more flexibility to with my remote power system.

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  • Expert
  • 148 Answers

Check inverter specifications if compatible with fridge,

Posted on Mar 22, 2014

6 Suggested Answers

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Posted on Jan 02, 2017

dcramer531
  • 1654 Answers

SOURCE: 3 way caravan fridge wont

I suspect it's either the 240V heater element or the 240V thermostat which has failed. You can test the element by identifying the wires to it and performing a resistance check. The heating element is in the metal stack in the rear of the unit. Use an OHM meter and check for resistance, the higher the better, low or no resistance means the elemnt is bad. Make sure you check all the fuses on the control board also.

Posted on Feb 15, 2011

  • 1 Answer

SOURCE: 12 volt power lead of

On your fridge freezer at the back there is a box that the fridge freezer 240 lead will go to lift up the box by following the instructions imprinted on the box. Then look at the melted lead and see if it has melted to the bare gold part. if it ant you are ok if it has then you have to take note of where all of the leads go Brown, blue, green/yellow then pull them out being careful to not to full out any over leads Ex. Now for the hard part find some one with a old fridge/freezer and ask them is you can take the lead of the back but make sure if your fridge freezer had an earth wire that there fridge/freezer has and has the same type of connection to plug it back into the part you pulled your lead out of. P.S the earth wire is the Green and yellow one. Then put them in your fridge and make sure the connections are not touching. Because that is probably why the over lead melted. Also get free stuff at: www.fastandfree.jimdo.com

Posted on Sep 28, 2010

motor1258
  • 6674 Answers

SOURCE: cant find the fuse for the refrig. no power

Check connection for 12 volts, at back of fridge behind vent cover .(outside) Make sure 12 volts getting to the lugs where they join. If you have 12 volts to there, unplug fridge at receptacle usually on left side by back of fridge, just to be safe. Remove cover on circuit board and look for a blown (glass type fuse in there.)

Posted on May 09, 2010

22yooper
  • 828 Answers

SOURCE: Dometic Caravan Fridge 7271

Your refrigerant may have completely separated in the system. Shut of the gas, disconnect the electrical and remove refrigerator from the coach or if you have sufficient room inside set it on a clean area. This operation is what is called burping the system.
1. From the base roll it onto the door and wait five minutes.
2. roll it onto the top and wait five minutes.
3. Roll it on the back and wait five minutes.
4. Return it to the base and wait five minutes.

Reinstall it or test it on electrical. It should show signs of cooling in about 30 minutes in the freezer compartment if the system is not plugged in the boiler.

Posted on May 26, 2008

  • 354 Answers

SOURCE: electrolux 3 way caravan fridge

Check outlet for voltage ,only if you know how ! if good then cord is bad

Posted on Feb 15, 2011

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Generator burning my electronics up


take you generator in and have the output tested for correct voltage and sine wave configuration
electronics rely on a perfect sine wave ac current as a manufactured sine wave affects electronic components such as capacitors, transistors and diodes
generator sets that run an alternator ( not an inverter ) have a pure sine wave and have less affect on electronics.
go google and type in search headings like ---sine wave, inverter sine wave, sine wave affects on electronics, alternator operation and inverter operations and then you may get a pointer as to why your inverter gen set is affecting your electronics

Jul 23, 2016 | Honda EU3000iS Inverter Generator

Tip

WHAT IS A POWER INVERTER?


A power inverter is an electronic device that converts electricityfrom one form to another. Power inverters have become more popularrecently as the technology has become more efficient and much moreaffordable.

The most popular use for a power inverter isconverting battery electricity into mains electricity. For exampleconverting your car batteries' 12 volts DC into mains electricity 240Volt AC (Australia) or 110 Volt AC (USA).

WHAT POWER INVERTERS WILL HELP YOU DO
  1. Power inverters enablemains operated electrical equipment to be used even where there is nomains outlets, like in your car, caravan or even on your boat!
  2. Powerinverters bring creature comforts from home when you go camping orcaravaning allowing you to use your TV, fridge or electric shaver infact most of the normal mains powered conveniences from the home.
  3. You can charge your laptop in the car even if it doesn't happen tohave a 12 volt adapter. In fact a power inverter can be a very handygadget just to have in your car for those times you need to use a mainspowered appliance while you're away from a power socket.

WHAT TO LOOK FOR WHEN BUYING A POWER INVERTER
Apartfrom looking for a good quality well priced product there are a coupleof important elements to consider when selecting your power inverter:

HOW MUCH POWER IS ENOUGH ?
Powerinverters come in a range of power capacities so selecting the rightone for you is very important. Your power inverter needs to be able toprovide sufficient power for the equipment you want to use it with.
Here is a brief check list:
  1. Check the power consumption for the device you want to power
  2. Allow an additional 20% free board
  3. Add the power for all the devices you want to run at the same time
Note also that devices with induction electric motors like an power saw mayrequire 3 to 7 times the operating power when they start.
Usingan under-powered power inverter may damage it or the appliance you aretrying to use, so be sure to check the specific wattage requirementsand operating instructions for appliances / tools to be used.

PURE SINE WAVE INVERTERS
Normal mains power is known as Alternating Current (AC) and is a sine wave shape like the black line in the drawing below
Pure sine wave (black) versus modified sine wave (red)
Atypical power inverter produces a 'modified sine wave output' like thered line in the drawing above. While this works for most appliances,light dimmers, variable speed drills, sewing machine speed controls,some laser printers etc. will not operate correctly with a modifiedsine wave power inverter.
Pure sine wave power inverters areespecially designed to provide a more accurate sine wave output and socan be used with these appliances, but unfortunately they are moreexpensive.
Check with your with appliance manufacturer or itsspecifications to confirm if you can use a conventional power inverteror will need a pure sine wave inverter.
WARRANTY
One of thegreat things about electronic equipment is there is no moving parts(although there is a fan in some models) so you can expect a longserviceable life from a power inverter.
STANDARDS
Powerinverters generate dangerous mains voltages so ensure the product youchoose is approved for use with your mains voltage and supplier.
Powerinverters can also generate electro-magnetic radiation that caninterfere with other electronic equipment such as radios transmittersetc. Check for compliance with relevant standards such as C-Tick etc

SAFETY
Powerinverters can generate potentially lethal voltages so the utmost ofcare should be exercised using them to avoid accidental electrocution.

SUMMARY
To select your power inverter carefully check the power requirements for the appliance(s) you intend to use it with.
  1. Start power - Allow up to seven times for an induction motor
  2. Operating power - Allow a 20% margin
  3. Pure or modified sine wave

on Mar 04, 2010 | Electronics - Others

1 Answer

Why does my dr3624 only put out 98 vac, its rated at 120 vac? i'm off grid and my batteries are new 24 volt


Are you using a true-RMS voltmeter to measure the DR's output? The DR's output is modified sine wave, and a cheap average reading AC voltmeter will give you a reading of 90 volts or so. Alternately, if you have an oscilloscope, you can verify that the modified sine wave is around 170V peak to peak. It should alternate in segments of -170, 0, +170, 0... The duty cycle and peak voltages will vary with the inverter load.
- Tom, Sun Electronics International, Miami, FL

Oct 03, 2010 | Xantrex Technology DR3624 Inverter/Charger

1 Answer

I bought a new Black and Decker 200 watt power invertor to plug into our car cigarette lighter to power a laptop. We did this and our car blew a fuse. We went to Saturn to fix it and they could not...


Most power inverters supply a modified sine wave output. This is different from the true sine wave you get at home. It's close enough for many applications, but not close enough for many transformers, which is what your laptop power supply is. So the problem is that your laptop's power supply does not work with a modified sine wave input. Some will, some won't. Very common problem.

Aug 23, 2010 | Black & Decker Electronics - Others

1 Answer

Charging laptop in car


Most inverters create a modified sine wave output, which is similar to, but not the same as the AC you get out of the wall. The power supply for many laptops (and most transformers in general) will not run with a modified sine wave input. There are devices available that skip the inverter and the power supply. They go directly from 12VDC to what your laptop needs.

Apr 23, 2010 | Black & Decker 200 Watt Power Inverter...

2 Answers

I got a output voltage of 100.1 on a trace dr3624


The rms voltage is what counts, because it tells how much power the output will deliver to a resistive load. Inexpensive multimeters on their AC ranges are usually average-responding rms-calibrated meters. This means they measure the average of the absolute value of the AC component of the signal, and display that average multiplied by about 1.11 (actually, pi over sqrt(8)), the ratio of rms to average value for a pure sine wave. That way, the meter will give the right rms reading for a sine wave.

If the signal is a square wave, where the average and rms values are equal, the average-responding meter will read 11% too high.

Many inverters put out a modified sine wave (MSW), which sits at zero for a while, goes to a constant positive level for a while, goes back to zero for a while, and goes to a constant negative level for a while to complete the cycle. The positive and negative parts of the signal have the same magnitude and duration.

The rms and average values of an MSW depend on its duty cycle D, the fraction of a cycle for which the signal is not at zero. In a well-designed inverter, the duty cycle will be adjusted when the DC input voltage goes up and down to maintain the nominal rms output voltage. If we use peak voltage Vp to mean the magnitude of the positive and negative voltages the signal goes to, then Vavg for an MSW is equal to Vp times D, and Vrms is equal to Vp times the square root of D.

The duty cycle for which an MSW will have the same rms to average ratio as a sine wave is 8 over pi squared, or 81%. For any duty cycle less than this, an average-responding meter will read a lower voltage than the inverter rms output, and for a duty cycle higher than this, the meter will read too high.

If your MSW inverter is putting out 120 volts rms and its duty cycle varies from 50% to 75%, the meter reading will vary from 94 volts to 115 volts. I avoid the problem by using a Radio Shack 22-174B true rms digital multimeter.

Aug 27, 2009 | Xantrex Technology DR2412 Inverter /...

1 Answer

Run a CPAP on a power inverter


I would not do this, you really need a pure sine wave inverter to guarantee the safety of your CPAP machine. At the price they are selling this device it could not be pure sine wave. 150W pure sine wave would be $70-$100.

Mar 05, 2009 | Thermal Engineering Corporation I-Tec 150...

3 Answers

Grundfos Pump On Xantrex Modified Sine Inverter?


Look I been using solar and wind power for the last 20 years and never used public utilitiy, run your inverter to a braker box and connect your pump to it donot forgfet to ground the box and the inverter. that is all what you need...remmber modified sine wave may effect the life of the pump if it is cheep it may be ok or you need to get true Sine wave.

Feb 09, 2009 | Xantrex Technology Xantrex Freedom Xmic...

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