I have a vector 2200 watt inverter that quit working. But after I tightened the 3 screws on the front it worked fine, for awhile. Now it emits a high pitched whine after about an hour. Is this because the battery that's running it has a problem? Thanks. Doug

some idea for inverter, collect inverter circuit Books from market.

Hello, I hear you. Was the reason to supply 240 volts? When you try the inverters separately, do you get 120Volts output? Let us look at the units working individually first and go from there.

Inverter run on batteries sir, and if these batteries are not charged, the run time {the number of hours it will work} reduces.
S0, you will need to connect the inverter to a power source.Theses will allow your batteries to be charged and enable it to run for a long period of time.
Make sure your batteries are still OK.i.e working properly

There is a fuse on these things at the back of the case. Could be in a slide out plastic holder, or in a round holder with a knurled screw or bayonet type cap. If this fuse is not blown, then the news is not good.

It sounds like the fuse that protects you cigarette lighter is blown.

After you have replaced the fuse, check the voltage again. 0.015vdc would not have powered anything that in manufactured to operate on 12vdc.

When powering anything over about 250W, I would suggest connecting directly to the battery to avoid overloading the lighter circuit.

how to repair power maxx inverter 1500 wats vec550pob

my inverter turns on but red and green light on at the same time, and fans working for 3 seconds on and off

Restating the question - 400 watt inverter is turned on and running with the vehicle turned off.
After starting vehicle the red light of the inverter is on with no power output from the inverter.
If you turn the inverter off then on inverter operates normally.

Solution - this is normal operation - my inverter does the same thing. When you start the vehicle
it draws a lot of current from the vehicle battery which causes a drop in battery voltage. Most inverters have a low voltage input safety and will fault the device.'

If the problem is turn on inverter then the red light starts flashing... I am thinking you
have the same problem as the one I replaced - it broke... I am sure some capicator
or other component in the circuit failed... My solution was to purchase a new one...

your inverter needs to cool at all times , if the fan does not work,try buying a small standing fan to blow cool air to you machine, it is possible that your heater is making the inverter to over heat please avoid using the heater on the inverter

Inverters use high power transistors to create an A/C voltage from a D/C input. These transistors are the common point of failure when the units are not cooled properly or used beyond their rated capacity. (Actually, you should always buy an inverter that’s rating for continuous use is well below what your actual need is). What’s most likely happened is that these have shorted out and need to be replaced. Unfortunately, replacement parts alone will likely cost nearly what a new unit costs.

Sorry to be the bearer of bad news; but you basically have a nice paperweight with some pretty lights and fans on it.

ground it off on the case...any grounding method should work. Unless you are talking about the main connection terminals... then just replace the missing thumb screw with a short screw and an eyelette type connecter.