Operating Instructions Z-D-15/35/55E-..
Error description and repair
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8 Error description and repair
8.1
What this chapter contains
This chapter describes known issues and their solving.
8.2
Typical errors and repairs
Error
cause
repair
Z-D-15/35/55E-..
wrong compensation
(THDi rises)
Current transformer
Check wiring and polarity
System settings
Check transformer ratio
Z-D-15/35/55E-..
insufficient
compensation (THDI
decreases but is
higher than expected)
Phase angle
Setting the phase angle compensation
with patience and carefully step by
step, Trial and error iteration
Low impedance
Low impedance of the connection
result in very harmonic levels before
compensation. It is highly
recommended to install impedance as
first counter measurement against
harmonics (for Drives basically DC or
AC chokes).
Error signal
(red LED)
System settings
Check for first error than for second
No communication
Software settings
Improve baud rate and/or interface
selection
