Joe Allen posted:Peter,
The Z-4000 has 12 amp breakers, so check your amp draw on the transformer amp meter.
At 18 volts on a handle, the Z4000 will power down at or before 10 amps without tripping the breaker. The max wattage on a handle is 180 watts. The power label says 165 VA, which would be a little over 9 amps at 18 volts. So, what do the meters read when you have the problem?
George