Tweco 300 TS Arcmaster(Feb2006) - Manual (Page 56)

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Description Possible Cause Remedy Remarks
11 E93 error code displayed
Memory chip (EEPROM) on control PCB
can not read/write weld parameters.
Memory chip (EEPROM) error. Have an accredited Thermal
Arc Service Agent check the
control PCB. Weld current ceases.
Buzzer sounds constantly.
Switch machine OFF.
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
15temperature 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.