Faults, Causes And Remedy; Restarting After Fault; Converter Fault Indications; Disposal - Grundfos MP 1 Bedienungsanleitung

11. Faults, causes and remedy

11.1 Restarting after fault

If the converter has cut out because of one of the faults shown in
section 11.2, the converter must be reset before the pump can be
restarted. Press [F2]. Locate the fault according to the table
below, and correct the fault.
Press [F2] on the converter. Then the display indication will
change into the initial display text. See fig. 10. The pump is now
ready for restarting. See section 8.1 Start-up.

11.2 Converter fault indications

Fault (display text) Cause
1. Overcurrent a) The motor current exceeded the peak limit.
2. Desaturation a) The motor current exceeds the desaturation
limit.
3. Ground fault a) A ground fault has been detected (leakage to
ground).
4. Overload a) The output current exceeded the limit for more
1 minute than 1 minute.
5. Overload a) The output current exceeded the limit for more
3 seconds than 3 seconds.
6. Motor overload a) The motor current exceeded the preset limits:
- 125 % for 590 seconds
- 150 % for 150 seconds
- 200 % for 50 seconds.
7. DC bus high a) The AC mains voltage is higher than 300 V.
8. DC bus low a) The AC mains voltage is lower than 163 V.
9. Drive over temp. a) Converter temperature above +85 °C.
10. Drive low temp. a) Converter temperature below –10 °C.
If the motor, motor cable, converter or converter cable is defective, please contact your nearest Grundfos distributor.
For other possible display texts, see page 62.

12. Disposal

This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest Grundfos company
or service workshop.
14
Remedy
Reduce the frequency.
Check the motor for overload.
Check the motor for blockage and short-circuit of the
motor cable.
Check the motor cable and the MP 1 with a
megohmmeter. The insulation resistance must be higher
than 0.5 MΩ at 1000 V.
Note: Before measuring the resistance, disconnect the
motor cable plug from the converter.
Reduce the frequency.
Reduce the frequency.
Reduce the frequency.
Check the motor for overload.
Check that the mains voltage lies within the voltage
range, 1 x 220-240 V – 15 %/+ 10 %.
Check that the mains voltage lies within the voltage
range, 1 x 220-240 V – 15 %/+ 10 %.
Check that the ambient temperature is lower than +45 °C.
The converter temperature must be above –10 °C before
use.
Subject to alterations.