Tweco 400 TS Arcmaster - Manual (Page 57)

50
Description Possible Cause Remedy Remarks
12 E94 error code displayed
Temperature sensor TH1 for IGBTs or
sensor TH2 for secondary diodes are
open circuit.
The Welding Power Source’s
temperature sensors have
malfunctioned.
Have an Accredited Thermal Arc
Service Agent check or replace
the temperature sensors. Weld current ceases.
Buzzer sounds constantly.
Switch machine OFF.
13 E99 error code displayed
Mains supply (input) voltage has been
turned OFF but control circuit has
power from the primary capacitors.
A
B
Main ON/OFF switch on
machine has been turned OFF.
Mains supply (input) voltage
has been turned OFF.
A
B
Turn ON/OFF switch on.
Have an Accredited Thermal
Arc Service Agent or a qualified
electrician check the Mains
voltage and fuses.
Weld current ceases.
Buzzer sounds constantly.
Must switch machine OFF
then ON to reset E99 error.