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18. Grundfos alarm and warning codes
This is a complete list of alarm and warning codes for Grundfos
products. For the codes supported by booster systems, see the
Alarms and warnings section.
Code Description
Code Description
Code Description
1
Leakage current
84
Memory access error
181
Signal fault, PTC sensor (short-
circuited)
2
Missing phase
85
Verification error, BE parameter
area (EEPROM)
182
Signal fault, bearing temperature
sensor (Pt100), bottom bearing
3
External fault signal
86
Fault (add-on) I/O module
183
Signal fault, extra temperature
sensor
4
Too many restarts
88
Sensor fault
184
Signal fault, general-purpose
sensor
5
Regenerative braking
89
Signal fault, (feedback) sensor 1
185
Unknown sensor type
6
Mains fault
90
Signal fault, speed sensor
186
Signal fault, power meter sensor
7
Too many hardware shutdowns
91
Signal fault, temperature sensor 1
187
Signal fault, energy meter
8
PWM switching frequency
reduced
92
Calibration fault, (feedback)
sensor
188
Signal fault, user-defined sensor
9
Phase sequence reversal
93
Signal fault, sensor 2
189
Signal fault, level sensor
10
Communication fault, pump
94
Limit exceeded, sensor 1
190
Limit exceeded, sensor 1 (e.g.
alarm level in WW application)
11
Water-in-oil fault (motor oil)
95
Limit exceeded, sensor 2
191
Limit exceeded, sensor 2 (e.g. high
level in WW application)
12
Time for service (general service
information)
96
Setpoint signal outside range
192
Limit exceeded, sensor 3 (e.g.
overflow level in WW application)
13
Moisture alarm, analog
97
Signal fault, setpoint input
193
Limit exceeded, sensor 4 (e.g. low
level in WW/tank filling application
14
Electronic DC-link protection
activated (ERP)
98
Signal fault, input for setpoint
influence
194
Limit exceeded, sensor 5
15
Communication fault, main
system (SCADA)
99
Signal fault, input for analog
setpoint
195
Limit exceeded, sensor 6
16
Other
100
RTC time synchronisation with
GSM occured
196
Operation with reduced efficiency
17
Performance requirement cannot
be met
102
Dosing pump not ready
197
Operation with reduced pressure
18
Commanded alarm standby (trip)
103
Emergency stop
198
Operation with increased power
consumption
19
Diaphragm break (dosing pump)
104
Software shutdown
199
Process out of range (monitoring/
estimation/calculation/control)
20
Insulation resistance low
105
Electronic rectifier protection
activated (ERP)
200
Application alarm
21
Too many starts per hour
106
Electronic inverter protection
activated (EIP)
201
External sensor input high
22
Moisture switch alarm, digital
110
Skew load, electrical asymmetry
202
External sensor input low
23
Smart trim gap alarm
111
Current asymmetry
203
Alarm on all pumps
24
Vibration
112
Cos
φ
too high
204
Inconsistency between sensors
25
Setup conflict
113
Cos
φ
too low
205
Level float switch sequence
inconsistency
26
Load continues even if the motor
has been switched off
114
Motor heater function activated
(frost protection)
206
Water shortage, level 1
27
External motor protector activated
(e.g. MP 204)
115
Too many grinder reversals or
grinder reversal attempt failed
207
Water leakage
28
Battery low
116
Grinder motor over temperature
208
Cavitation
29
Turbine operation (impellers
forced backwards)
118
Signal fault, hydrogen sulfide H2S
sensor
209
Non-return valve fault
30
Change bearings (specific service
information)
119
Signal fault, analog input AI4
210
High pressure
31
Change varistor(s) (specific
service information)
120
Auxiliary winding fault (single-
phase motors)
211
Low pressure
32
Overvoltage
121
Auxiliary winding current too high
(single-phase motors)
212
Diaphragm tank precharge
pressure out of range
33
Soon time for service (general
service information)
122
Auxiliary winding current too low
(single-phase motors)
213
VFD not ready
34
No priming water
123
Start capacitor, low (single-phase
motors)
214
Water shortage, level 2
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