Amada Miyachi Unitek STA-100A, Operation Manual, Page: 59 / 154

CHAPTER 4: OPERATING INSTRUCTIONS
STA SERIES AC CONTROLS
990-351 4-11
Section V: Operational Messages
You may receive one of the following error messages during set-up or operation of the Control. The
message tells you what corrective action should be taken. If you cannot correct the action by performing
these instructions, contact your Amada Miyachi America representative. Major errors require pressing
the
RESET
button or giving a signal to the
RESET
input to clear the error. If
AUTO RESET
is turned
ON
,
minor errors can be cleared by the next
START
signal. If
AUTO RESET
is turned
OFF
, minor errors must
be cleared by pressing the
RESET
button or giving a signal to the
RESET
input. See Chapter 3, Section
VIII for more information on
AUTO RESET.
Major Run-Time Error Messages
************ EMERGENCY STOP ************
THE SYSTEM HAS ENCOUNTERED A SERIOUS
CONDITION, POSSIBLY INVOLVING A
SAFETY HAZARD. CLEAR THE CONDITION
AND PRESS THE RESET BUTTON TO
REBOOT.
OVERTEMP ALARM:
CHECK THERMOSTAT CIRCUIT
PRESS RESET TO RESUME WELDING
NOTE: If an external weld transformer thermostat is connected into the circuit
OVERTEMP ALARM
will be displayed if the external transformer thermostat opens. as shown in Appendix K, Circuit
Modification for External Transformer Thermostat,
NO CURRENT. VERIFY THAT THERE IS:
1. ENOUGH WELD FORCE 6.
FULL CURR SET
2. NO COIL BREAKAGE IN RANGE
3. INTACT COIL CABLE
7. CORRECT SCR
4. GOOD COIL CABLE UNIT POWER
CONNECTION
5. ENOUGH SQZ TIME
PRESS RESET BUTTON TO RESUME WELDING.
SCHEDULE 01
WELD 2 CURRENT EXCEEDED HIGH LIMIT.
1. REPROGRAM WELD 2 CURRENT.
2. INCREASE WELD TRANSFORMER RATIO.
3. INCREASE W2 HIGH LIMIT AT THE
MONITOR SCREEN.
PRESS RESET BUTTON TO RESUME WELDING.