Grundfos RSI Series - Fault Diagnosis and Troubleshooting; Fault Codes and Remedies

English (GB)
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6. Fault finding
6.1 Fault codes and remedies
Fault
code
Fault
ID
Fault name Possible cause Remedy
1
1
Overcurrent
(hardware fault)
AC drive has detected too high a
current (> 4*I
H
) in the motor cable:
• sudden heavy load increase
• short circuit in motor cables
• unsuitable motor
Check loading.
Check motor.
Check cables and connections.
Make identification run.
Check ramp times.
2
Overcurrent
(software fault)
2
10
Overvoltage
(hardware fault)
The DC-link voltage has exceeded
the limits defined.
• too short a deceleration time
• brake chopper is disabled
• high overvoltage spikes in supply
• Start/Stop sequence too fast
Make deceleration time longer.
Use brake chopper or brake
resistor (available as options).
Activate overvoltage controller.
Check input voltage.
11
Overvoltage
(software fault)
3
20
Earth fault
(hardware fault)
Current measurement has detected
that the sum of motor phase current
is not zero.
• insulation failure in cables or
motor
Check motor cables and motor.
21
Earth fault
(software fault)
540Charging switch
The charging switch is open, when
the START command has been
given.
• faulty operation
• component failure
Reset the fault and restart.
Should the fault re-occur,
contact the distributor near to
you.
760Saturation
Various causes:
• defective component
• brake resistor short-circuit or
overload
Cannot be reset from keypad.
Switch off power.
Do not re-connect power!
Contact factory.
If this fault appears
simultaneously with F1, check
motor cables and motor.