Grundfos CU 362, Installation And Operating Instructions Manual

Page: 18 / 76

7.3 Alarm and warning codes
Code Description Origin Cause Remedy
1 Leakage current CUE Leakage current detected Check CUE local HMI for fault description.
2 Missing phase
MP
204/CUE
Phase disconnected Check pre-fuses and circuit breakers.
3 External fault
MP 204/IO
351/IO
113/CUE
Fault in external module Check all external modules connected via GENIbus.
4
Too many pump auto-
restarts per 24 h
MP 204 Overcurrent Check pump, valves and pipes for blockages.
6 Mains supply fault
MP
204/CUE
Phase missing or drifted
Check voltages between phases, pre-fuses and circuit
breakers.
9
Motor-phase sequence
reversal
MP 204 Phases interchanged Check phase sequence.
10
Pump (power line)
communication fault
IO 113 Communication to SM 113 Check cables between IO 113 and SM 113.
11
Water-in-oil content too
high
IO 113 Water-in-oil compartment
Water-in-oil content has passed threshold. Lower shaft-
seal and oil needs replacement.
12
Motor operating-time
service interval limit
exceeded
CU 362 Service interval
User-defined service interval has been reached.
Arrange for preventive maintenance.
15 SCADA callback fault CU 362 SCADA failed to respond
Check cellular network connection. Check if SCADA
phone number is correct. Check status of external
SCADA system.
16 Other fault CUE Fault reported by CUE Check fault locally on CUE drive.
17
Capacity too low
(Performance
requirements not met)
Dosing
pump
Dosing volume not met
Check status of dosing pump. Perform calibration
of dosing pump.
18
Motor protector
commanded (test) trip
MP 204 Test trip activated Test trip activated on MP 204.
19
Diaphragm break - dosing
pump Dosing
pump
Diaphragm break detected Replace diaphragm in dosing pump.
20
Motor insulation resistance
low IO 113/MP
204 Insulation resistance
too low
Check setting. Motor may need replacement.
21
Motor max. starts per hour
limit exceeded
CU 362 Max. starts exceeded
User setting of max. number of starts exceeded.
Evaluate setting. Evaluate stop and start levels to
increase pump runtime.
22 Motor moisture switch IO 113 Moisture switch activated
Moisture or water detected inside motor. Overhaul of
pump or motor is needed.
24 Motor/pump vibration high IO 113
Vibration threshold
exceeded Check pump, valves and pipes for blockages. Pump
may need overhaul.
25 Setup conflict IO 113 Setup conflict in IO 113
Check settings of DIP switches of IO 113. Check
warning and alarm threshold in IO 113 by using PC Tool
Water Utility.
26
Load continues despite
motor relay is off
MP 204
Current drawn when it
should not be
Check motor relay (possibility of contact welding).
27
Motor protector activated
via DI
CU 362 Motor protection tripped
Check possible causes for tripping. Check pump,
valves and pipes for blockages.
30
Change bearings (specific
service information)
CUE
Change bearings reported
by CUE
Check local alarms and instructions on CUE.
32 Motor high voltage
MP
204/CUE
Voltage too high
Voltage on one or multiple phases is too high. Check
incoming voltage.
33 Soon time for service
Dosing
pump
Service interval is close
User-defined service interval is close. Arrange for
preventive maintenance on dosing pump.
35
Gas in pump head,
deaerating problem Dosing
pump
Gas in pump head
Check the installation and operating instructions of
the dosing pump for remedy.
36 Pressure valve leakage
Dosing
Pump
Pressure valve leakage
Check the installation and operating instructions of
the dosing pump for remedy.
37 Suction valve leakage
Dosing
pump
Suction valve leakage
Check the installation and operating instructions of
the dosing pump for remedy.
38 Venting valve defect
Dosing
pump
Venting valve defect
Check the installation and operating instructions of
the dosing pump for remedy.
18
English (GB)