Tweco 300 MST Arcmaster - Manual (Page 56)

50
Description Possible Cause Remedy Remarks
7 E81 error code displayed
Wrong Primary supply (input)
voltage connected.
When 3 phase machine
is first turned ON with
the wrong Primary
supply (input) voltage
connected.
Have an accredited
Thermal Arc Service
Agent or a qualified
electrician check
the Mains voltage.
No weld current is
available.
Buzzer sounds constantly.
Switch machine OFF.
8 E82 error code displayed
Link switch plug
not connected.
Link switch plug
not connected.
Have an accredited
Thermal Arc Service
Agent check connector
plug on input PCB.
No weld current is
available. Buzzer
sounds constantly.
Switch machine OFF.
9 E83 error code displayed
CPU checks mains supply
(input) voltage when the
ON/OFF switch on rear panel of
machine is turned ON.
The Primary supply
(input) voltage
fluctuates and is
not stable.
Have an accredited
Thermal Arc Service
Agent check connector
plug on input PCB and the
Mains voltage.
No weld current is
available. Buzzer sounds
constantly.Switch machine
OFF then ON to reset
E83 error.
10 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.
11 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.
12 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.