Hypertherm H401 Power Supplies - Manual (Page 36)

OPERATION
4-2 H401 & H601 Instruction Manual
4
Controls and Indicators
Voltmeter 1 VM
Displays active arc voltage
Current Control P1
Adjusts the cutting current
Ammeter 1 AM
Displays the cutting current
Control Power Circuit Breaker 1CB
Turns the power supply control circuits
ON or OFF
DC ON Indicator 1PL
Illuminates when the main
contactor 1C closes
Over Temperature Indicator 2PL
Illuminates when the transformer
has overheated. See Maintenance
for corrective action if this lamp
illuminates.