Wilo Control DigiCon, Installation And Operating Instructions Manual

Page: 43 / 106

Installation and operating instructions Wilo-Control DigiCon/DigiCon-A 37
English
9 Maintenance
Maintenance and repair work must only be carried out by qualified personnel.
WARNING! Danger of electric shock
Risks through the electricity supply must be prevented.
For all maintenance and repair work, the interface converter/pump(s)/plant
must be switched off at the mains and protected against unauthorised
switching on again.
10 Faults, causes and remedy
Problem Causes/to be checked Solution
A pump on a DigiCon
does not comply
with the Building
management
system (BMS)
specifications. The BMS does not send the
correct specifications. Check the BMS, alternatively,
temporarily disconnect the PLR
connection at the pump and set
the pump locally.
The “Bus Communication” sig-
nal lamp lights up red con-
stantly or now and then. RS 485 cable: check connection,
termination resistances and
cable screen.
Check on the pump display
whether the automatic com-
munication build-up between
pump(s) and DigiCon via the
PLR interface has taken place:
the communication symbol
“double arrow” must be visible
on the pump display. • Cable between DigiCon and
pump is interrupted,
repair cable.
• Check IF-Module
All pumps at a Digi-
Con do not comply
with specifications
of the Building
management
system (BMS). The BMS does not send the
correct specifications. Check the BMS, alternatively,
temporarily disconnect the RS
485 at the transfer point and
control pump(s) locally at the
DigiCon.
The “Bus Communication” sig-
nal lamp lights up red con-
stantly or now and then. RS 485 cable: check connection,
termination resistances and
cable screen.
“Pump Communication” signal
lamp lights up red constantly. • Check cable between pump
and DigiCon.
• Check IF-Module.
Cable between BMS and Digi-
Con is interrupted. Repair cable, alternatively, con-
trol pump(s) locally at the Digi-
Con.
Tab. 13