Wilo Control DigiCon Instrucciones De Instalación Y Funcionamiento página 44

English
Problem
Pump does not start. Press "button" (Fig. 1, item 16)
"Pump Communica-
tion" signal lamp
lights up red.
The "Bus Communi-
cation" signal lamp
lights up red
constantly or now
and then.
Tab. 13
If the fault cannot be remedied, please contact the respective trade or get in
touch with your nearest Wilo customer service or agent.
38
Causes/to be checked
for pump indicated. If it starts,
the pump was switched off by
a command from the interface
RS 485.
Check whether the "off" con-
trol contact on the DigiCon-A
is closed.
Override the "on" control
contact, if the pump is now
running, BMS sends the
command "pump off"
continuously via the RS 485.
Check whether the control
contact "Ext. Off" at the pump
is open.
Wiring fault between pump
and DigiCon.
No mains voltage at the pump. Restore mains voltage.
Fault at the pump.
Communication between
DigiCon and pump defective
Communication between
DigiCon(s) and BMS defective
Solution
Open the "off" control contact
on the DigiCon-A.
Switch on the pump in the BMS.
Override "Ext. Off" at the pump.
Check cable.
Remedy fault.
• Check cable.
• Check IF-Module.
• Check the BMS, alternatively,
temporarily disconnect RS 485
at the transfer point and
control pump(s) locally at the
DigiCon.
• RS 485 cable: check connec-
tion, termination resistances
and cable screen.
WILO SE 04/2009