English (GB)
46
16. Grundfos alarm and warning codes
This is a general Grundfos alarm and warning code list. Not all
codes apply to Grundfos E-pumps.
Code Description Code Description Code Description
1 Leakage current 36 Discharge valve leakage 77
Communication fault, twin-head
pump
2 Missing phase 37 Suction valve leakage 78 Fault, speed plug
3 External fault signal 38 Vent valve defective 79 Functional fault, add-on module
4 Too many restarts 40 Undervoltage 80 Hardware fault, type 2
5 Regenerative braking 41 Undervoltage transient 81 Verification error, data area (RAM)
6 Mains fault 42 Cut-in fault (dV/dt) 82
Verification error, code area (ROM,
FLASH)
7 Too many hardware shutdowns 45 Voltage asymmetry 83
Verification error, FE parameter
area (EEPROM)
8
PWM switching frequency
reduced
48 Overload 84 Memory access error
9 Phase sequence reversal 49 Overcurrent (i_line, i_dc, i_mo) 85
Verification error, BE parameter
area (EEPROM)
10 Communication fault, pump 50
Motor protection function, general
shutdown (mpf)
88 Sensor fault
11 Water-in-oil fault (motor oil) 51 Blocked motor/pump 89 Signal fault, feedback sensor 1
12
Time for service
(general service information)
52 Motor slip high 90 Signal fault, speed sensor
13 Moisture alarm, analog 53 Stalled motor 91 Signal fault, temperature 1 sensor
14
Electronic DC-link protection
activated (ERP)
54
Motor protection function, 3 sec.
limit
92 Calibration fault, feedback sensor
15
Communication fault, main system
(SCADA)
55
Motor current protection activated
(MCP)
93 Signal fault, sensor 2
16 Other 56 Underload 94 Limit exceeded, sensor 1
17
Performance requirement cannot
be met
57 Dry running 95 Limit exceeded, sensor 2
18 Commanded alarm standby (trip) 58 Low flow 96 Setpoint signal outside range
19 Diaphragm break (dosing pump) 59 No flow 97 Signal fault, setpoint input
20 Insulation resistance low 60 Low input power
21 Too many starts per hour 64 Overtemperature 98
Signal fault, input for setpoint
influence
22 Moisture switch alarm, digital 65
Motor temperature 1
(t_m or t_mo or t_mo1)
99
Signal fault, input for analog
setpoint
23 Smart trim gap alarm 66
Temperature, control electronics
(t_e)
104 Software shutdown
24 Vibration 67
Temperature too high, internal
frequency converter module (t_m)
105
Electronic rectifier protection
activated (ERP)
25 Setup conflict 68
External temperature/water
temperature (t_w)
106
Electronic inverter protection
activated (EIP)
26
Load continues even if the motor
has been switched off
69
Thermal relay 1 in motor
(e.g. Klixon)
110 Skew load, electrical asymmetry
27
External motor protector activated
(e.g. MP 204)
70
Thermal relay 2 in motor
(e.g. thermistor)
111 Current asymmetry
28 Battery low 71
Motor temperature 2
(Pt100, t_mo2)
112 Cos
φ too high
29
Turbine operation (impellers
forced backwards)
72 Hardware fault, type 1 113 Cos φ too low
30
Change bearings (specific service
information)
73 Hardware shutdown (HSD) 120
Auxiliary winding fault
(single-phase motors)
31
Change varistor(s) (specific
service information)
74 Internal supply voltage too high 121
Auxiliary winding current too high
(single-phase motors)
32 Overvoltage 75 Internal supply voltage too low 122
Auxiliary winding current too low
(single-phase motors)
35
Gas in pump head, deaerating
problem
76 Internal communication fault 123
Start capacitor, low
(single-phase motors)
To Next Page
Loading...
