Hello.
The reasons of A036 are the same as for F036:
- Armature circuit is open (e.g. DC fuses have blown, open circuit, etc.)
- Rectifier stability limit αG (P150) is incorrectly set
- Drive is operating at αG limit (e.g. due to supply undervoltage)
- EMF is too high because maximum speed setting is too high, refer to P083, P115, P143, P741)
- EMF is too high because field weakening is not selected (refer to P082)
- EMF is too high because field current is set too high (refer to P102)
- EMF is too high because transition speed for field weakening is set too high (refer to P101) ??

So, check this reasons and parameters.