14
6.7.3 External fault signals
The expansion modules, type MC xx, have an output
from a potential-free changeover relay via terminals
2 and 3.
Functions of signal outputs:
The fault signal output is activated when the pump
registers a fault. The fault signal relay is activated to-
gether with the red indicator light on the pump.
Resetting of fault indications:
A fault indication can be reset in one of the following
ways:
• Briefly press “+” or “–” on the pump. This will not
influence the pump performance set.
• Briefly switch off the electricity supply to the
pump.
• By means of the R100, see section 7.4 R100.
The fault indication cannot be reset until the cause of
the fault has disappeared.
6.7.4 External forced control
The expansion modules MC xx and MB xx incorpo-
rate inputs for external signals for the forced-control
functions:
• Start/stop input (terminals 7 and 8).
• Max. curve duty (terminals 7 and 10).
• Min. curve duty (terminals 7 and 9).
During forced control, the light fields/indicator lights
on the pump will show which function is active.
Functional diagram: Start/stop input:
Functional diagram: Max. curve input:
The max. curve input is only active if the start/stop
input is closed.
Functional diagram: Min. curve input:
The min. curve input is only active if the start/stop in-
put is closed and the max. curve input is open.
Indicator Lights
Internal
relay
Description
Fault
(red)
Opera-
tion
(green)
Contact
position
of termi-
nals
1, 2 and 3
Off Off
The electricity
supply has been
switched off.
Off
Perma-
nently
on
The pump is oper-
ating.
Off
Flash-
ing
The pump has
been set to stop.
Perma-
nently
on
Off
The pump has
stopped because
of a fault. Restart-
ing will be at-
tempted.
Perma-
nently
on
Perma-
nently
on
The pump is oper-
ating, but it has
been stopped be-
cause of a fault.
Perma-
nently
on
Flash-
ing
The pump has
been set to stop,
but it has been
stopped because
of a fault.
132
NC NO C
132
NC NO C
132
NC NO C
12 3
NC NO C
12 3
NC NO C
12 3
NC NO C
Start/stop
Normal duty
Stop
Max. curve
Normal duty
Max. curve
Min. curve
Normal duty
Min. curve
(night-time duty)
Q
H
H
Q
Q
H
Q
H
Q
H
Q
H
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