17. Grundfos alarm and warning codes
This is a complete list of alarm and warning codes for Grundfos products. For the codes supported by this product, see the alarms and
warnings section.
Code Description Code Description Code Description
1 Leakage current 2 Missing phase 3 External fault signal
4 Too many restarts 5 Regenerative braking 6 Mains fault
7 Too many hardware shutdowns 8 PWM switching frequency reduced 9 Phase sequence reversal
10 Communication fault, pump 11 Water-in-oil fault (motor oil) 12
Time for service (general service
information)
13 Moisture alarm, analog 14
Electronic DC-link protection activated
(ERP)
15
Communication fault, main system
(SCADA)
16 Other 17 Performance requirement cannot be met 18 Commanded alarm standby (trip)
19 Diaphragm break (dosing pump) 20 Insulation resistance low 21 Too many starts per hour
22 Moisture switch alarm, digital 23 Smart trim gap alarm 24 Vibration
25 Setup conflict 26
Load continues even if the motor has
been switched off
27
External motor protector activated
(for example MP 204)
28 Battery low 29
Turbine operation (impellers forced
backwards)
30
Change bearings
(specific service information)
31
Change varistor(s)
(specific service information)
32 Overvoltage 33
Soon time for service
(general service information)
34 No priming water 35 Gas in pump head, de-aerating problem 36 Outlet valve leakage
37 Inlet valve leakage 38 Vent valve defective 39 Valve stuck or defective
40 Undervoltage 41 Undervoltage transient 42 Cut-in fault (dV/dt)
43 - 44 - 45 Voltage asymmetry
46 - 47 - 48 Overload
49 Overcurrent (i_line, i_dc, i_mo) 50
Motor-protection function, general
shutdown (MPF)
51 Blocked motor or pump
52 Motor slip high 53 Stalled motor 54 Motor-protection function, 3 sec. limit
55
Motor current protection activated
(MCP)
56 Underload 57 Dry running
58 Low flow 59 No flow 60 Low input power
61 - 62 - 63 -
64 - 65
Motor temperature 1
(t_m or t_mo or t_mo1)
66
Temperature, control electronics
(t_e)
67
Temperature too high, internal frequency
converter module (t_m)
68
External temperature or water
temperature (t_w)
69
Thermal relay 1 in motor, for example
Klixon
70
Thermal relay 2 in motor, for example
thermistor
71
Motor temperature 2
(Pt100, t_mo2)
72 Hardware fault, type 1
73 Hardware shutdown (HSD) 74 Internal supply voltage too high 75 Internal supply voltage too low
76 Internal communication fault 77 Communication fault, twin-head pump 78 Fault, speed plug
79 Functional fault, add-on module 80 Hardware fault, type 2 81 Verification error, data area (RAM)
82
Verification error, code area (ROM,
FLASH)
83
Verification error, FE parameter area
(EEPROM)
84 Memory access error
85
Verification error, BE parameter area
(EEPROM)
86 Fault (add-on) I/O module 87 -
88 Sensor fault 89 Signal fault, (feedback) sensor 1 90 Signal fault, speed sensor
91 Signal fault, temperature sensor 1 92 Calibration fault, (feedback) sensor 93 Signal fault, sensor 2
94 Limit exceeded, sensor 1 95 Limit exceeded, sensor 2 96 Setpoint signal outside range
97 Signal fault, setpoint input 98 Signal fault, input for setpoint influence 99 Signal fault, input for analog setpoint
100
RTC time synchronisation with cellular
network occurred
101 - 102 Dosing pump not ready
103 Emergency stop 104 Software shutdown 105
Electronic rectifier protection activated
(ERP)
106
Electronic inverter protection activated
(EIP)
107 - 108 -
109 - 110 Skew load, electrical asymmetry 111 Current asymmetry
112 Cosφ too high 113 Cosφ too low 114
Motor heater function activated (frost
protection)
115
Too many grinder reversals or grinder
reversal attempt failed
116 Grinder motor overtemperature 117 Intrusion (door opened)
118 Signal fault, hydrogen sulfide H2S sensor 119 Signal fault, analog input AI4 120
Auxiliary winding fault
(single phase motors)
50
English (GB)
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