Wilo Stratos PARA Série Notice De Montage Et De Mise En Service page 46

English
10.1 Fault message
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 sec-
onds 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
46
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 12/2017