Nord Drivesystems SK 750E Series, Manual

Page: 137 / 153

8 Error signals
BU 0750 GB Technical design subject to change
137
Display Type of failure
Cause
 What to do about it
Group Details see
P700 / P701
E017 17.0 Change of custom interface
A new customer interface has been installed, or
none at all.
 Switch the mains voltage OFF and then ON
again.
E020 20.0 External RAM error
Errors in program execution (system errors) as a
result of electromagnetic interference
 Please verify observance of the wiring in-
structions in Section 2.6.
 Fit additional external line filter (Section
10.3 / 10.4 EMC)
 The inverter should be very effectively con-
nected to earth.
20.1 Watchdog
20.2 Stack overflow
20.3 Stack underflow
20.4 Undefined opcode
20.5 Protected instruction
20.6 Illegal word access
20.7 Illegal instruction access
20.8 EPROM error
20.9 Dual-port memory error
21.0 NMI error (not used in relation to
hardware)
21.1 PLL error
21.2 ADU Overrun
21.3
PMI Access Error