Amada HF-2500A, Operation Manual, Page: 91 / 164

CHAPTER 6: MAINTENANCE
HF-2500A HIGH FREQUENCY WELD CONTROL
990-371 6-3
Problem Cause (in order of probability) Problem Cause (in order of probability)
Weld
Piece
Over-
heating
1. Excessive weld time set at HF-2500A
2. Excessive current/energy set at HF-
2500A
2. Insufficient weld head force
3. Incompatible weld piece materials
3. Wrong electrode material/tip shape
4. Contaminated electrode surface
Weld Piece
Discoloration
1. Excessive weld time set at HF-2500A
1. No cover gas on weld piece
2. Excessive current/energy set at HF-
2500A
3. Insufficient weld head force
3. Contaminated weld piece surface/
plating
4. Wrong electrode material/tip shape
4. Contaminated electrode surface
Alarm Messages
Alarm Message Description Corrective Action
ACCESS DENIED!
SYSTEM
SECURITY ON
Operator tried to change a weld schedule
number, individual weld schedule
parameters, I/O switch functions, and
calibration parameters.
Press MENU, select System Security, then enter
the correct access code to turn off the System or
Calibration Lock protection features.
NOTE: Entering a security code of 280 will
always unlock the system.
ACCESS DENIED!
SCHEDULE LOCK
ON
Operator tried to change a weld schedule
or individual weld parameters.
Press MENU, select System Security, then enter
your access code to turn off System Security.
NOTE: Entering a security code of 280 will
always unlock the system.
CALIBRATION
RESET TO
DEFAULT
User entered calibration values reset to
factory default values. Execute the built-in calibration procedure to get
the correct setting.
CHECK CONTROL
SIGNALS INPUT
STATUS One or more of the I/O input control
signals is preventing the HF-2500A from
continuing to operate.
Remove the I/O input control signal condition
preventing further HF-2500A operation.
NOTE: The correct removal action depends on
how the control signal select in the Setup 1 menu
was programmed by the user.
CHECK INPUT
SWITCH STATUS
One or more of the Firing or Foot Switch
input signals is preventing the HF-2500A
from continuing to operate.
Remove the I/O input control signal condition
preventing further HF-2500A operation.
NOTE: The correct removal action depends on
how the INPUT SWITCH SELECT in the Setup
1 menu was programmed by the user.
CHECK VOLTAGE
CABLE No electrode voltage measurement was
made.
Verity that the Voltage Sense Cable is properly
connected to the electrodes or electrode holder.
NOTE: Polarity is not important for the cable
connection.
CURRENT 1
GREATER THAN
UPPER LIMIT
Actual weld current is greater than the
user set Upper Limit value for Weld1.
Reset the Upper Limit for Weld1 to a larger value.