Installation and operating instructions Wilo-TOP-S/-SD/-Z/-D/-RL/-I
49
English
10 Faults, causes and remedies
Have faults remedied only by qualified personnel! Observe the safety
instructions in chapter 9!
Fault
Cause
Remedy
The system is noisy.
Air in the system
Bleed the system.
The flow rate at the pump
is too high.
Reduce the pump power by
switching to a lower speed.
The pump delivery head is
too high.
Reduce the pump power by
switching to a lower speed.
Pump is noisy.
Cavitation due to insuffi-
cient supply pressure
Check pressure stability/supply
pressure and if necessary increase
them within the permissible range.
Foreign bodies in the
pump housing or impeller.
After deinstallation of the motor
impeller unit, remove the foreign
body.
Air within the pump.
Bleed the pump/system.
The check valves in the
system are not fully open.
Fully open the check valves.
The pump power is
too low.
Foreign bodies in the
pump housing or impeller.
After deinstallation of the motor
impeller unit, remove the foreign
body.
Incorrect flow direction.
Interchange the pressure side and
suction side of the pump. Refer to
the direction arrow on the pump
housing or pump flange.
The check valves in the
system are not fully open.
Fully open the check valves.
Incorrect direction of
rotation
Correct the electrical connections
in the terminal box:
Refer to the direction of rotation
arrow on the name plate
(only for 3~) terminal box type 6/7:
Indicator light off
Interchange two phases at the
mains supply terminals.
(only for 1~) terminal boxes type 8/9:
Indicator light off
Correct the connection of the
capacitor.
(only for 3~) terminal boxes type 8/9:
Indicator light off
Interchange two phases at the
mains supply terminals.
Содержание TOP-D Series
Страница 2: ...Fig 1 Fig 2 Fig 3...
Страница 3: ...Fig 4 1 Fig 4 3 max med min 1 230V...
Страница 4: ...Fig 4 1 3 3 400 V 3 230 V 1 230 V Fig 5 Fig 6 Fig 7...
