Operation
Grundfos CUE
38
Warning and alarm list
1)
In case of an alarm, the CUE will change the operating mode depend-
ing on the pump type. For example: In constant pressure mode, SP’s will
run at min. speed while CR’s will run at 70% of max. speed.
2)
AMA, Automatic Motor Adaptation.
3)
Warning is reset in display 3.20.
In case of fault or malfunction of the CUE, the latest five
warnings and latest five alarms can be found in the log
menus.
Warning
The CUE will continue the operation as long as the
warning is active. The warning remains active until the
cause no longer exists. Some warnings may switch to
alarm condition if the warning has been present for a
period.
Alarm
In case of an alarm, the CUE will stop the pump or
change the operating mode depending on the alarm
type and pump type.
Pump operation will be resumed when the cause of the
alar
m has been remedied and the alarm has been
reset.
Resetting an alarm manually
• Press OK in the alarm display.
• Press On/Off twice.
• Activate a digital input DI 2-DI 4 set to Al
arm reset
or the digital input DI 1 (Start/stop).
If it is not possible to reset an alarm, the reason may be
th
at the fault has not been remedied, or that the alarm
has been locked.
Locked alarm
In case of a locked alarm, the CUE will stop the pump
and
become locked. Pump operation cannot be
resumed until the cause of the locked alarm has been
remedied and the alarm has been reset.
Resetting a locked alarm
• Switch off the electricity supply to the CUE for ap-
prox. 30 seconds. Switch on the electricity supply,
and pr
ess OK in the alarm display to reset the
alarm.
Code and display text
Status
Operat-
ing
mode
Re-
setting
Warning
Alarm
Locked alarm
1 Too high leakage current z Stop Man.
2 Mains phase failure
z Stop Aut.
3 External fault
z Stop Man.
16 Other fault
z Stop Aut.
z Stop Man.
30 Replace motor bearings
z –
Man.
3)
32 Overvoltage
z –Aut.
z Stop Aut.
40 Undervoltage
z –Aut.
z Stop Aut.
48 Overload
z Stop Aut.
z Stop Man.
49 Overload
z Stop Aut.
55 Overload
z –Aut.
z Stop Aut.
57 Dry running
z Stop Aut.
64
Too high CUE tempera-
ture
z Stop Aut.
70
Too high motor tempera-
ture
z Stop Aut.
77
Communication fault,
duty/standby
z –Aut.
89 Sensor 1 outside range
z
1)
Aut.
91
Temperature sensor 1
outside range
z –Aut.
93 Sensor 2 outside range
z –Aut.
96
Setpoint signal outside
range
z
1)
Aut.
148
Too high bearing temper-
ature
z –Aut.
z Stop Aut.
149
Too high bearing temper-
ature
z –Aut.
z Stop Aut.
155 Inrush fault
z Stop Aut.
175
Temperature sensor 2
outside range
z –Aut.
240
Relubricate motor bear-
ings
z –
Man.
3)
241 Motor phase failure
z –Aut.
z Stop Aut.
242 AMA
2)
did not succeed z – Man.
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