Grundfos MGE F, Service Instructions Manual

Page: 15 / 32

English (GB)
15
4.7 Fault finding using alarm and warning codes
Apart from being indicated by the indicator lights on the control
panel, alarms, warnings and their fault codes can be read using
Grundfos GO Remote or PC-Tool E-Products.
4.7.1 Alarm and warning list
The list below gives you an overview of the possible alarms and
warnings and a description of their causes and suggestions for
remedy.
These abbreviations are used in the column "Fault type":
W: Warning.
A: Alarm.
1): The alarm can be configured to Warn/Max/Min/Stop/User
using the PC Tool E-products.
Fault code Fault reading in Grundfos GO Remote Fault reading in PC Tool E-products Fault type
Explanation/cause Remedy
3 External fault External fault signal A
The digital input set for "External fault" was or is closed
(terminal 1, 10 or 11). When the digital input is no longer closed, the fault indication can be reset with
Grundfos GO Remote, PC-Tool E-Products or by pressing or
.
4 Too many restarts Too many restarts (from standby mode per 24) A
• The number of attempted restarts at 10-second
intervals after a fault has exceeded four within one
minute.
• The number of attempted restarts at five-minute
intervals after a fault has exceeded 16 within 24
hours.
Seek the cause under the fault log code numbers in Grundfos GO Remote or
PC-Tool E-Products.
The pump will automatically attempt to restart after 24 hours.
The fault indication can be reset with Grundfos GO remote, PC-Tool E-
Products or by pressing or
.
30 Replace motor bearings Motor bearings need change (service information) W
The motor has reached the number of operating hours
for the bearing service life that is stated in the
configuration.
Replace the bearings. See section
5.2 Replacement of motor bearings
.
31 Replace varistor Motor varistor(s) need change (service information) W
The varistor has been exposed to the allowable number
of transients and needs replacing.
Contact Grundfos Service.
32 Overvoltage Overvoltage A
The supply voltage has been or is too high. Reduce the voltage to the specified level (see the nameplate).
40 Undervoltage Undervoltage A
The supply voltage has been or is too low. Increase the voltage to the specified level (see the nameplate).
41 Undervoltage Undervoltage transient A
There has been a voltage drop in the supply voltage
caused by one of the following:
• Supply cable too small.
• Another big user is supplied from the same panel.
45 Mains voltage asymmetry Voltage asymmetry A
The supply voltage has been or is asymmetric. Check the supply voltage at the source while the motor is loaded.
49 Overload Overcurrent (i_line, i_dc, i_mo) A
The terminal box or the motor is heavily overloaded.
Cause:
• Blocked pump.
• Remove the blockage.
• Blocked rotor. • Remove the blockage.
• Continued overload. • Reduce the load.
• Incorrect configuration of the terminal box. • Contact Grundfos Service.
• Wrong terminal box. • Contact Grundfos Service.
• Fault in stator windings. • Contact Grundfos Service.
• Power supply failure (phase failure). • Re-establish correct power supply.
51 Overload Blocked motor/pump A
The pump is blocked during start-up which causes a
heavy overload. The input current is very high; the
motor P > 120 % for 60 seconds.
Remove the blockage.