24
10. Grundfos alarm and warning codes
This is a general Grundfos alarm and warning code list. Not all codes are available in the MP 204.
Code
Description
Code
Description
Code
Description
1
Leakage current
35
Gas in pump head, deaerating
problem
76
Internal communication fault
2
Missing phase
36
Discharge valve leakage
77
Communication fault, twin-head
pump
3
External fault signal
37
Suction valve leakage
78
Fault, speed plug
4
Too many restarts
38
Vent valve defective
79
Functional fault, add-on module
5
Regenerative braking
40
Undervoltage
80
Hardware fault, type 2
6
Mains fault
41
Undervoltage transient
81
Verification error, data area (RAM)
7
Too many hardware shutdowns
42
Cut-in fault (dV/dt)
82
Verification error, code area
(ROM, FLASH)
8
PWM switching frequency
reduced
45
Voltage asymmetry
83
Verification error, FE parameter
area (EEPROM)
9
Phase sequence reversal
48
Overload
84
Memory access error
10
Communication fault, pump
49
Overcurrent (i_line, i_dc, i_mo)
85
Verification error, BE parameter
area (EEPROM)
11
Water-in-oil fault (motor oil)
50
Motor protection function,
general shutdown (mpf)
88
Sensor fault
12
Time for service
(general service information)
51
Blocked motor/pump
89
Signal fault, (feedback) sensor 1
13
Moisture alarm, analog
52
Motor slip high
90
Signal fault, speed sensor
14
Electronic DC-link protection
activated (ERP)
53
Kipped motor
91
Signal fault, temperature 1 sensor
15
Communication fault, main system
(SCADA)
54
Motor protection function,
3 sec. limit
92
Calibration fault, (feedback)
sensor
16
Other
55
Motor current protection activated
(MCP)
93
Signal fault, sensor 2
17
Performance requirement cannot
be met
56
Underload
94
Limit exceeded, sensor 1
18
Commanded alarm standby (trip)
57
Dry running
95
Limit exceeded, sensor 2
19
Diaphragm break (dosing pump)
58
Low flow
96
Setpoint signal outside range
20
Insulation resistance low
59
No flow
97
Signal fault, setpoint input
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)
