Wilo Stratos PARA/-Z Serie Notice De Montage Et De Mise En Service page 48

English
10.1 Fault signal
Faults always result in the activation of the "collective fault signal" (SSM) via a
relay
.
The response of the pump depends on the type of fault (see process diagram and
table 10.1).
Process diagram of the temporal response of the pump in the event of a fault
Pump status
0 = off / 1 = on
tr ta
1
n=1
0
ts
Explanations regarding the fault process
(ts) Fault present:
Start time of the fault process
(tr) Response time:
Time until the fault is detected
(ta) Delay time:
Time until the pump starts again; for restart times see table 10.2
(n) Occurring fault:
Number of repeated faults
(Tar) Time for restart attempts:
Time resulting from repetitions of the restart for as long as the fault is present. "Tar" can
be 0 seconds if the fault only occurs once (n=1).
(N) Allowed number of faults:
If there is a restricted fault rate, the counter is only reset if a fault no longer occurs within
30 seconds (tn). Otherwise the mains voltage must be disconnected for >30 seconds in
order to restart the pump.
Auto reset:
Yes: the number of allowed faults is unrestricted. The software ensures a restart of the
No:
(Tr) Total duration of SSM activity:
Duration of the operating fault of the pump; the SSM contact is open
›
Waiting time to check whether a new fault follows.
œ
Pump runs again in the normal operating mode,
(tx) Fault is remedied; SSM is closed
44
tn
Tar = (n-1)x(tr+ta) (30s)
n=2 ... n < N
1
tx Time (t)
pump after the delay time.
the number of allowed faults is restricted. The pump can only be restarted if the
mains voltage is disconnected for >30 seconds.
SSM status
0 = not active (closed) /
1 = active (open)
tr ta Tar = (n-1)x(tr+ta)
1
0
ts
tn
(30s)
Tr
2
tx Time (t)
WILO SE 02/2015