Installation and operating instructions Wilo-Varios PICO-STG
27
en
8 Decommissioning
Shutting down
the pump
Shut down the pump immediately if the connecting
cable or other electrical components are damaged.
• Disconnect the pump from the power supply.
• Contact Wilo customer service or a specialist technician.
9 Maintenance
Cleaning
• Carefully remove dirt from the pump on a regular basis
using a dry duster.
• Never use liquids or aggressive cleaning agents.
10 Faults, causes and remedies
The troubleshooting must only be carried out by a qual
-
ified specialist, and work on the electrical connection
must only be carried out by a qualified electrician.
Faults
Causes
Remedy
Pump is not
running
although the
power supply is
switched on
Electrical fuse
defective
Check fuses
No voltage supply
at pump
Rectify the power interruption
Noisy pump
Cavitation due to
insufficient suction
pressure
Increase the system pressure within
the permissible range
Check the delivery head and set it to
a lower head if necessary
Building does
not warm up
Thermal output of
the heating surfaces
is too low
Increase setpoint
Set control mode to Δp-c
