PROTECTION AND ALARM
Protection and alarm
When an alarm occurs, the triangular alarm symbol starts to flash. Window 00 becomes
active and gives information about the alarm according to the alarm list in the table below.
For all alarms the alarm relay indicates fault. The pump stops for all alarms except F4.
SYMBOL FUNCTION
F1 Indicates wrong phase sequence between line L1, L2, L3
F2 Indicates bigger phase voltage asymmetry than set in
window 41
F3 Indicates that the current from the current transformer is
out of range
F4 Indicates that snoring is detected at the same time as the
high level switch is activated
F5 Indicates e.g. high temperature in the pump motor
OU Indicates overvoltage on L1, L2, L3
LU Indicates undervoltage on L1, L2, L3 or interruption on L1
when FPC100 is switched on
Phase sequence (F1)
When FPC100 is switched on, phases L1, L2 and L3 are checked for correct phase
sequence. If wrong sequence is detected, an F1-alarm is generated. The pump will not
start.
Note: The phase sequence is checked on the FPC100 terminals. To ensure that the motor
will run in the correct direction of rotation, the phases to the motor have to be connected
in the same sequence as to the FPC100.
Action:
• Switch off the main supply! Disconnected and swap positions of phases L2 and L3.
Phase asymmetry (F2)
An F2-alarm is generated when the phase asymmetry on the supply voltage exceeds the
permitted level during five seconds. The pump will stop.
The permitted level is set in window 41 between 5-50 % or to OFF if supervision not is
requested.
In window 42 the F2 alarm can be latched (“on”), or not latched (“OFF”). Reset a latched
alarm by pressing RESET.
It can also be reset via the digital input if it is used for External reset.
Action:
• If the alarm is not latched, the pump will start again if the asymmetry is temporary and
disappears.
• If the alarm is latched, RESET to check whether the asymmetry was temporary or not. If
the asymmetry was temporary the pump will start again.
• In case of permanent phase asymmetry, the fault has to be corrected.
Current transformer (F3)
When AUTOSET is pressed FPC100 checks that the current is within acceptable limits. If
the current is below 10mA or above 60mA when AUTOSET is pressed, an F3-alarm is
generated and the pump will stop. The measured current is displayed in window 61.
Note: In case of 0 mA (pump is off) when AUTOSET is pressed, the stop level will be set to
0 and no alarm will be generated. This makes it possible to clear the stop level value.
PROTECTION AND ALARM
Single pump controller Installation and user manual for FPC100 19
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