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Is your compressors motor capacitor replaceable? I know that on a split system, a dead capacitor (typically a 35uF) can cause increased current draw, to the point of blowing fuses, though I've never had to replace one on a portable unit. I usually replace them with a 30uF capacitor, roughly the size of a "200ml can of softdrink".
If the fuse is blowing before the battery is installed to charge, the problem lies on the circuit board. Since it is most likely a switch mode supply, you might try replacing the electrolytic capacitors first. Then check what should be a MOSFET, although some may have a regular bipolar transistor as well.
If the charger blows the fuse when the battery is installed for charging, the battery has some shorted cells that overloading the charger, or the contacts are distorted and being shorted by the battery
Hello,
the problem of the continuos blowing of fuse internally is as a result of a defected component on the pcb board of the recevier .
you can do this by removing the cover of the recevier and check for the power transistor , power capacitor, if is defected with the use of a multimeter, replace for a new one of the same number
Seems to me like there is a short somewhere, check all of your wiring. If it is still blowing fuses when it is wired so that all it has is power and ground, then you have something shorting internally, most likely a capacitor.
If it blows the fuse as soon as you hit the START button, it's almost certainly a shorted high-voltage capacitor.
If it blows a few seconds after you hit the START button, it's probably the high-voltage transformer. You'll possibly also smell a faint electrical burning smell from the rear vent after you shut if off.
If it blows the fuse as soon as it's plugged in, you probably have a shorted door switch, a shorted varistor, or an internally exposed wire shorting to the chassis, etc.
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