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16
! PROBLEMS IN PLASMA CUTTING
TROUBLESHOOTING PLASMA CUTTING
PROBLEMS
(SYMPTOMS)
PROBLEM CAUSE
RECOMMENDED ACTION
Fan stops working
% Fan power cord is off
% Enclosure blocks the fan that causes
deformations
% The fan fails
% Reconnect the power cord
% Reform the enclosure
% Replace the fan
Warning light on
% Over heat
% Over current
% Cut after cooling down
% Lower input voltage or replace machine
No output
% Over current protection
% The machine fails
% Lower input voltage
% Do maintenance in manufacturer or
service center
Output current
decreased
% Input voltage is too low
% Input line is too thin
% Increase input voltage
% Thicken power line
Current cannot be
regulated
% Connecting line of the potentiometer
is off
% Potentiometer of current regulation
fails
% Reconnection the line
% Replace the potentiometer
High frequency
arc cannot be
generated
% The switch fails
% Incorrect selection for the air flow, the
electrode fails
% High frequency arc generator fails
% Replace the switch
% Replace the electrode
% Replace the high frequency arc generator
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