Code Description Origin Cause Remedy
40 Motor low voltage
MP
204/CUE
Voltage too low
Voltage on one or multiple phases is too low. Check
incoming voltage.
48
Motor overload
(max. current)
AI/MP
204/CUE
Max. current threshold
exceeded
Check pump, valves and pipes for blockages.
47
Cable breakdown
on analog (Reference
input sig. fault)
Dosing
pump
Cable breakdown
Check the installation and operating instructions of
the dosing pump for remedy.
49 Overcurrent CUE
Overcurrent reported by
CUE
Check local alarms on CUE. Check pump, valves and
pipes for blockages.
51 Blocked motor/pump
Dosing
pump
Blocked motor or pump
Back pressure is too high. Gears are damaged. Check
discharge line for blockages. Check internal gears for
damage.
55
Motor current protection
activated (MCP)
CUE MCP reported by CUE
Check local alarms on CUE. Check pump, valves and
pipes for blockages.
56
Motor underload
(min. current)
AI/MP
204/CUE
Minimum current threshold
exceeded
Check running condition of pump.
57 Dry running
CU 362/
Dosing
pump
Dry-running level reached Check inflow to pit. Check level of chemical tank.
58 Pump low flow CU 362
Alarm for low flow
exceeded
Check pump, valves and pipes for blockages.
64
Motor stator temp. high
(T1, Pt1000/Pt100)
IO 113
Stator temperature
threshold exceeded
Check pump, valves and pipes for blockages.
69
Motor temperature alarm,
PTC1
IO 113
Motor temperature too
high
Check pump, valves and pipes for blockages.
70
Motor temperature alarm,
PTC2
IO 351/MP
204/CUE
Motor temperature too
high
Check pump, valves and pipes for blockages.
71
Motor stator temp. high
(T2, Pt1000/Pt100)
MP 204
Stator temperature
threshold exceeded
Check pump, valves and pipes for blockages.
72 Hardware fault
CU 362/IO
351/IO
113/MP 204
Possible hardware fault
Power cycle the main supply. If fault is still active, check
each module individually. Controller or module may
need replacement.
76
Internal communication
fault
CU 362 Possible hardware fault
Power cycle the controller. If fault is still active, replace
controller.
77
Communication fault, twin-
head pump
CUE
Communication fault
reported by CUE
Check local alarms and instructions on CUE.
84 Memory access error CU 362 Possible hardware fault
Power cycle the controller. If fault is still active, replace
controller.
88
Motor current sensor
signal fault
CU 362 AI
External analog current
transformer fault
Check connection to external current transformer.
Measure if coil has open circuit. Coil
may need replacement.
89
Signal fault, (feedback)
sensor 1
CUE
Signal fault on (feedback)
sensor 1 on CUE drive
Check sensor and connections on CUE drive.
91
Signal fault,
temperature sensor 1
CUE
Signal fault on sensor 1 on
CUE drive
Check sensor and connections on CUE drive.
93 Signal fault, sensor 2 CUE
Signal fault on sensor 2 on
CUE drive
Check sensor and connections on CUE drive.
102 Dosing pump not ready
Dosing pum
p
Dosing pump not ready Check status of dosing pump.
103 Emergency stop CU 362 Emergency stop activated Check reason for activating the emergency stop.
111 Motor current asymmetry MP 204 Current draw not equal
Measure winding resistance on motor. Check incoming
voltages. Motor may need replacement.
112 Motor cos phi too high MP 204
Max. cos phi threshold
exceeded
Consider settings. Check pump, valves and pipes for
blockages.
113 Motor cos phi too low MP 204
Min. cos phi threshold
exceeded
Check settings. Check if pump sucks in air.
115
Too many grinder
reversals or grinder rev.
attempt failed
CU 362
Too many grinder
reversals
Check grinder for blockages.
116
Grinder motor
overtemperature
CU 362 Grinder motor overloaded Check cause for motor overload.
118
Hydrogen sulphide (H
2
S )
sensor fault
CU 362
H
2
S sensor fault Check remote Hydrogen sulphide (H
2
S) sensor.
19
English (GB)
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