Siemens Micromaster 440 Operating Instructions Manual page 102

6 Troubleshooting
A0707 CB warning 8
Possible Causes
CB (communication board) specific
Diagnose & Remedy
See CB user manual
A0708 CB warning 9
Possible Causes
CB (communication board) specific
Diagnose & Remedy
See CB user manual
A0709 CB warning 10
Possible Causes
CB (communication board) specific
Diagnose & Remedy
See CB user manual
A0710 CB communication error
Possible Causes
Communication with CB (communication board) is lost
Diagnose & Remedy
Check CB hardware
A0711 CB configuration error
Possible Causes
CB (communication board) reports a configuration error.
Diagnose & Remedy
Check CB parameters
A0910 Vdc-max controller de-activated
Possible Causes
Vdc max controller has been de-activated, since controller is not capable of keeping DC-link voltage
(r0026) within limits (P2172).
! Occurs if main supply voltage (P0210) is permanently too high
! Occurs if motor is driven by an active load, causing motor to go into regenerative mode
! Occurs at very high load inertias, when ramping down
Diagnose & Remedy
Check the following:
1. Input voltage (P0210) must lie within range
2. Load must be match
102
MICROMASTER 440 Operating Instructions
6SE6400-5AW00-0BP0
Issue 12/02