Grundfos LC 231 Manual Del Usuario página 19

Related information
6.12 Setting the maximum number of restarts with
Grundfos GO Remote
6.15.4 Setting the motor protection with Grundfos
GO Remote
8.9 Code 48 (Motor is overloaded)
6.15.3 Moisture protection
When a moisture sensor is installed in series with the
temperature sensor, the control unit needs to know
how to determine whether there is a high temperature
or moisture in the pump. If the temperature is too
high, normally the temperature sensor will go back to
its normal stage when the temperature has dropped
to its trigger level. If there is moisture in the pump,
then the moisture sensor will keep the series
connection open until the pump is opened and
serviced.
To determine which sensor has been active, a cool
down time must be entered. This is the time that will
normally pass until the temperature has dropped
enough for the temperature sensor to return to its
normal stage. If the cool down time is exceeded, the
control unit will assume that there is moisture in the
pump, and it will send a moisture alarm.
Related information
6.15.4 Setting the motor protection with Grundfos
GO Remote
6.15.4 Setting the motor protection with Grundfos
GO Remote
You can set the current, temperature and moisture
protection via a setup wizard.
1. Go to Settings > Motor protection pump 1.
2. Follow the on-screen wizard to set the following:
• Nominal pump current
• Trip IEC class
• Pump connection
• Overheat protection.
Related information
2.3.3 Connecting the pump supply and power
supply
6.12 Setting the maximum number of restarts with
Grundfos GO Remote
6.15.1 Overheat protection
6.15.2 Overload protection
6.15.3 Moisture protection
6.15.5 Trip class
8.10 Code 51 (Blocked)
8.23 Code 220 (Contactor wear out)
6.15.5 Trip class
The trip delay indicates the maximum period of time
during which the overload condition is allowed to exist
within a period of 0.1 - 30 seconds.
Y
1
2
Curves for trip class "P
Pos. Description
Y Current
X Time
1 Rated motor current
2 10-second trip delay
3 Curve with tripping
4 Curve without tripping
A pump is to cut out after 10 seconds because the
rated current has been exceeded.
1. Select trip class.
2. Set the overload limit to 10 A. The rated motor
current is stated on the nameplate.
See position 3, curve with tripping. LC 231 cuts out
the pump because the pump startup time exceeds 10
seconds and the current exceeds 10 A.
See position 4, curve without tripping. During pump
startup the starting current only briefly exceeds 10 A
and the pump is not cut out.
3
4
X
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