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The thyristors are set to full scale
• Was the set point set via motor potentiometer function? Check value using the LBA.
• Check the control characteric (STA, STE, ADD).
• Controller feedback signal available? Check current transformer and voltage transformer
connections at the terminal blocks X7.1 and X7.2.
• Parameters TSMI and H_IE, U
rms min
, I
rms min
, P
min
are larger than 0.
• Controller parameters Ti and Kp are set too small.
• Parameters IEMA, UEMA, PMA are set too large or the load current is too small.
• Possibly thyristor short-circuit
REMARK
In case the load current is too small (connection of a test load), the device must be parameterized
for U, U
2
control or ”without control“. The regulation limits continue to remain active. Connection
of a minimal load (e.g. 100W lightbulb) is necessary.
Measures in case of other malfunction
• Evaluation of incident register (data logger) with LBA or Thyro-Tool
• Comparison of actual parameters of Thyro-P with parameters in type list.
• Comparison of actual parameters of Thyro-P with the system dependent parameters stored in the
PC.
• Correct number of controlled phases ((parameters)
• With activated trouble signal relay Evaluation which faults led to a response, eliminate the fault.