Edition 050614
-- 5 6 --
clhr1fe2com
Checking the gate pulses
Never measure the gate pulses when the power unit is connected to the mains. The gate
circuits are at mains voltage.
Disconnect the power unit from the mains, and follow
the instructions below.
Disconnection from the mains supply
1. Remove wires 261, 262 and 263 from terminal
block A on circuit board 15AP1.
2. Unplug contact 2XS2 from 15AP1.
3. Insulate the wires that have been removed
from each other and from all other parts.
Disconnection of the 400 V supply to the power board
Disconnection of the overvoltage and undervoltage protection
In order to be able to start the power unit, the overvoltage and undervoltage protection must
be disabled before connecting the unit to the mains. Short -- circuit pins 1 and 3 on
connector SB on circuit board 20AP1.
Circuit board 20AP1, connector SB
AristoTig 400 an d AristoMig U400:
Disconnect the HF starting unit by removing fuse 2FU5 from transformer 2TC2: see the
connection diagram.
AristoMig 400 and AristoMig U400:
A wire feed unit with control panel or AristoPendant U8 must be connected in order to be
able to operate the power unit.
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