I don't know that inverter in particular. Most inverters that I have repaired were not fused on the AC output side. They instead relied on internal current
sensing/limiting circuits. A few inverters had board mounted fast blow fuses
to kill power to the output thyristors in the event of a massive overload. This is most common on very old inverters that use an SCR for the output thyristor. An SCR tends to fail as a short circuit so the fuse is needed to prevent unpleasantly exciting events
About 90% of the inverters that I have repaired only needed to have the output thyristors replaced. Some older ones also needed the main capacitor banks replaced. A few had problems in the firing control circuit. Most of those I scrapped.
My best source for replacement parts
was Galco industrial electronics
. They carry a pretty full line of SCRs, IGBTs, rectifier bridges, etc. They can be found on the web.
You really need someone with a strong electronics
background to go poking around inside one of those things. Also be aware that many of those will have high voltages stored in capacitors for quite some time after external power is removed.
As a general statement, when a motor
load (such as an air conditioner) is run off of an inverter, it beats on the output thyristors in the inverter. An electric motor
will normally draw about 6 times it's rated full load amperage when starting from a dead stop. This is called locked rotor current
. These short duration current spikes peck away at the P/N junctions inside of a semiconductor like a woodpecker pecking at a tree. The effect is cumulative & eventually enough junctions will be gone that the semiconductor will fail. If you are going to run motor
loads off of an inverter, it is usually best to oversize the inverter by a good margin to compensate for this issue. If the locked rotor current is within the capacity of the inverter, then there should be no problems. If the locked rotor current is outside the inverter's rating by a moderate amount, then trouble should take a while to manifest itself.