Appendix D
Alarm Messages
Continued from Previous Page
Alarm Code
Alarm Message
Explanation
Solution
U1
10
Power not OK Fault
Problem with incoming
AC line voltage.
Verify that the incoming
AC Line voltage supplied to the
generator is within the range specified for the generator
.
Consult the manual for your generator
U
111
Overtemperature Fault
Generator has exceeded its tempera
-
ture limit.
Check for blockage of air vents on the sides of the genera
-
tor
, restricting air flow to the inside of the generator
.
Check if the internal fan is defective.
U1
12
Frequency Overload Fault 3
(PLL
Limit Exceeded)
The operating frequency was artificially bounded by the system frequency limits for 25 consecutive milliseconds. This is usually due to excessive operat
-
ing frequency drift (operating frequency is “far” from free run frequency) due to heating of the stack.
Execute the following steps to alleviate the problem: Observe the last operating frequency from a test graph. Enable “Advanced Process Settings”. Change “System Frequency Limits” to “Manual” and adjust the of
fending upper/lower frequency limit to an acceptably
safe value for your horn/stack/application.
Often as a horn/stack heats up, it may begin to have trouble starting (Frequency Overload Fault 1) because the operat
-
ing frequency is drifting away from the generator
’s Free Run
Frequency setting.
Adjusting the Free Run Frequency may also be advisable. A sudden shift in frequency (as observed on the graph) im
-
mediately before a Frequency Overload Fault 3, as opposed to a general frequency drift, indicates stack/horn coupling to the part during the weld or an another abrupt change in stack resonance.
This does not imply an operating frequen
-
cy drift issue, but a weld application setup issue.
U200
Servo Controller Fault
One of several possible problems detected on servo controller
.
Cycle power on the generator
.
If alarm persists, contact Dukane.
U201
Force Duration Exceeded
Large amount of force was applied for an excessive amount of time while jogging.
Cycle power on the generator
.
Do not apply large force for long periods of time while in jog mode.
U202
Position Error Limit Exceeded
Servo press was not able to complete the programmed motion due to reach
-
ing its maximum force capability
.
Decrease trigger force, weld and/or hold speed(s). Use alternate press model with larger force capacity
.
U203
Amplifier Error
Indicates a problem with the servo amplifier
.
Cycle power on the generator
.
If alarm persists, contact Dukane.
U204
Command Error
Servo controller program error
.
Cycle power on the generator
.
If alarm persists, contact Dukane.
U205
Checksum Error
Internal servo controller error
.
Cycle power on the generator
.
If alarm persists, contact Dukane.
Table D-I
Servo Press Alarm Message Screens - Page 2 of 4
Continued
Page 158
iQ Series
Ultrasonic Generator/Power Supply, Servo Systems, ES User’s Manual
Dukane Manual Part No. 403-587-00