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