Grundfos E-pumps

Grundfos E-pumps
3
Warning and alarm list
Fault
code
Single phase MLE Three phase MLE Warning Alarm
3 External fault External fault ●
4 Too many restarts Too many restarts ●
7 Too many restarts ●
30 Replace motor bearings ●
31 Replace varistor* ●
32 Overvoltage Overvoltage ●
40 Undervoltage Undervoltage ●
41 Undervoltage transient ●
45 Mains asymmetry ●
49 Overload Overload ●
51 Blocked motor ●
55 Motor current protection Motor current protection ●
56 Underload ●
57 Dry run ●
65 Motor temperature protection Motor temperature protection ●
73 Hardware shutdown Hardware shutdown ●
76 Internal communication error ●
77 Duty/Standby communication error ●
85 Unrecoverable EEPROM fault Unrecoverable EEPROM fault ●
88 Sensor fault Sensor 1 fault ●
91 Temperature sensor 1 fault ●
93 Sensor 2 fault ●
96
Reference input fault
Common term: “External setpoint fault”
Reference input fault
Common term: “External setpoint fault”
● 1) ● 2)
105 Electronic rectifier protection Electronic rectifier protection ●
106 Electronic inverter protection Electronic inverter protection ●
148 Drive-end bearing temperature ●
149 Non drive-end bearing temperature ●
155 Undervoltage ●
156 Internal communication error ●
175 Temperature sensor 2 fault ●
190 Limit 1 exceeded ●
191 Limit 2 exceeded ●
240 Relubricate motor bearings ●
255 Unknown ●
E-pumps
*The varistor protects the pump against power supply
transients. If voltage transients occur, the varistor will be worn
over time and need to be replaced. The more transients, the
more quickly the varistor will be worn. A Grundfos technician
is required for replacement of the varistor.
1)
Single phase MLE
2)
Three phase MLE
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