MAWA-050A
8. Troubleshooting
8-4
Error
code
Error
message
Cause
Time of
detection
Corrective measure
E20
Torch2 - end
of counter
reached
“TOTAL COUNT” reached the
count of “PRESET.”
At an
operation
before
welding
Reset “TOTAL COUNT” to
zero or set “PRESET” again.
E21
EXT COMM
error
Something in the external
communication data is incorrect
and the communication process
was terminated abnormally.
At all times
Make a connection check or
review the communication
setting and the setting range
of the welding conditions.
E22 FeRAM
error
The data reading/writing from
FeRAM was not terminated
normally.
At all times
If this error occurs after a
restart, repairing is required.
Make contact with us.
E23
E-Stop not
reset
An error occurred in the internal
circuit.
At all times
Check whether the
“Emergency stop” button is
kept in a pushed status.
If the status cannot be
improved, there is a possibility
of any component failure.
Make contact with us.
E24
Charge time
error
The charging time setting was
faulty.
At an
operation
before
welding
If this error occurs after a
restart, repairing is required.
Make contact with us.
E25
Gas flow
error
When setting the user input
terminals IN1 and IN2 to GAS
FLOW, the input is turned to OFF.
At a start of
welding
Check the connection and
setting of flow sensor and the
residual quantity of gas.
E26
Watchdog
error
An error occurred in the
microcomputer of the main unit.
At all times
If this error occurs after a
restart, repairing is required.
Make contact with us.
E28
Torch head
error
The H-ERROR signal (motor
controller error) was input.
At all times
Check the H-ERROR signal of
optional I/O.
Check whether an error
occurs in the torch head.
*1 It takes 6 seconds to make a recovery from the emergency stop status. The time up to the
recovery is displayed on the Error screen.
Emergency stop status
recovery time display
E01 Emergency STOP
