REXROTH DIAX04, Troubleshooting Manual

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4-16
Description of Diagnostic Letters F... and E... DIAX04 ELS-06VRS
DOK-DIAX04-ELS-06VRS**-WA01-EN-P
Remedy:
- Reduce maximum torque level
- Use a step up (mains) transformer, to increase the mains supply voltage
to the drive.
F316 Softstart fault power supply unit
The DC bus cannot be activated.
Cause:
1. Short-circuit in power supply or drive controller.
2. Too many additional capacitors have been connected.
3. Interrupt in DC bus choke (only applies to HVE)
Remedy:
1. Disconnect the servo drives from the power supply module.
Apply power to the power supply. If the soft start error is still
displayed, exchange the power supply module. Otherwise switch
off the power and connect only the first drive to the power supply.
Reapply power and determine if the error message returns. If so,
exchange the drive, otherwise continue by connecting one drive
at a time until the defective unit is determined. Once the
defective unit is determined, exchange it.
2. The number of additional capacitor must be reduced or a
separate loading device must be used.
3. Check the DC bus choke and input cables and replace if
necessary.
F318 Heatsink overtemp. fault power supply unit
Power switched off due to excessive heatsink temperature.
Cause:
The unit is overloaded or ambient temperature is too high.
Remedy:
Check load and ambient temperature. Temperature pre-warning contact
of the unit must be checked.
F320 Braking resistor overload
Power shutoff due to high bleeder load.
Cause:
1. In the HVR, too much regenerated drive energy even with
power off.
2. In the HVE, continuous regenerated power or drive
energy is too high.
3. Unit is defective.
Remedy:
On 1: Reduce drive speed. Delay power off in the case of Power Supply
switch off or emergency stop.