9. Diagnostics and Fault Clearance
• DOK-CONTRL-DDC+MDD+DLC-ANW1-EN-E1,44 • 01.97
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9.2.
Fault Displays of the Drive Controller
Fault messages and warnings are signalled via the diagnostics display H1.
Warnings are flashed. If there is no response to a warning, the drive control-
ler shuts down and an error message is displayed. Errors are stored. Once
the error has been cleared, then it can be cancelled by pressing the fault
reset button S1, by a positive edge at the CLEAR input of the DEA 4.1 or by
the CL key of the CTA (optional).
..
Watchdog
Processor in drive controller not working.
Remedy
1. There is no software module or it is defective.
2. Processor defective
18
Drive overtemperature shutdown
An unacceptably high temperature was detected in the power stage of the
drive controller. The message "amplifier overtemperature warning" was
generated for 30 seconds (warning 50). Depending on the error reaction, the
drive was brought to a standstill.
Remedy
1. Machine blower break down
2. Blower mesh dirty
3. Heatsink dirty
19
Motor overtemperature shutdown
The motor has overheated to an unacceptable level. For 30 seconds,
warning 51 was generated. The drive is brought to a standstill in terms of the
error reaction selected.
Remedy
1. The motor was overloaded. The effective torque which the motor required
exceeded the permissible continuous torque at standstill for too long a
period.
2. Earth short or short circuit in the lead to the motor temperature monitor.
20
Bleeder overtemperature
Remedy
Continuous regenerative power too high
1. Plug-in software module or replace it.
2. Replace drive controller.
1. Replace the drive controller if the blower has broken down.
2. Clean blower mesh and/or heatsink.
1. Check motor layout. In those plants which have been running for an
extensive period it is advisable to check whether the drive conditions
have changed in terms of dirt contamination, friction, moving masses
and so on.
2. Check the lead to the motor temperature monitor for earth short or short
circuits.
1. Adjust working cycle
2. Use a drive controller with higher continuous bleeder power.