English (GB)
87
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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