Operating instructions

48
Mechanical and electrical design
Fig.
56
1
2
3
4
5
6
7
8
9
10
11
approx. 5 seconds
4710
LED pattern of flashes Error code/message
on display Cause
31E Heat sink on MCU too hot.
32E Motor thermal protection device activated
33E MCU has received start command,
but not received interlock signal.
13E Communication error MCU – PCU
- Short in motor windings, wiring or internally in MCU.
MCU will restart automatically.
35E Once again short in motor windings, wiring or internally
in MCU.
36E Fault in interlock circuits in MCU.
37E MCU DC voltage too low.
38E MCU DC voltage too high
39E Ripple DC-bus (EWD 4000 only).
41E Fault/error in MCU overheating circuits.
56
Error indication patterns
If a fault or error occurs in the motor or motor control unit, the MCU sends
an error signal to the PCU board. In addition to an error code showing on
the display, errors/faults are revealed by the flashing of a yellow LED on the
MCU board. The table below shows how to identify the error/fault on the
basis of the flashing pattern of this LED.
Fig.
57