Tweco 400 MSTP Arcmaster - Manual (Page 71)

65
Description Possible Cause Remedy Remarks
6 E12 error code displayed
Under mains supply (input)
voltage primary capacitors is
reduced for
one second.
Mains supply voltage is
down to a dangerously
low level.
Have an accredited
Thermal
Arc Service Agent or a
qualified electrician
check
the Mains voltage. Weld current ceases.
Buzzer sounds constantly.
Error code E12
automatically will reset
when the voltage
increases.
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.