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wear. an increase in current absorp-
tion is symptomatic of abnormal
mechanical friction in the pump.
• Special maintenance may be required
to clean the pump and replace any
worn parts.
• if the pump is not used for prolonged
periods (e.g. for an entire season) it
should be drained completely rinsed
with clean water and stored in a dry
location.
at least twice a year, inspect the expansi-
on tank and check the pre-charge pres-
sure, sealing efficiency of the joints and
all areas for visible signs of damage and/
or corrosion. to check the pre-charge
pressure, turn off the pump and drain all
water from the system until the system
water pressure has returned to zero. on
completion of the check, restore the sys-
tem to normal conditions.
QUIck tRoUBle-
SHootINg gUIDe
Refer to the "safety instructions".
Water leaks from the air valve of the
expansion tank when checking the gas
pressure
• the membrane inside the tank is
damaged = replace the internal mem-
brane of the tank or replace the tank
itself
the pump does not work
• No power supply = turn on the switch
and check that no electrical connec-
tions are loose or defective.
• check the mains voltage
• fuse blown = check that the cables
and relative connections are not de-
24 24
fective and replace the fuse if neces-
sary
• the single phase motor thermal cut-
out has tripped = this is reset auto-
matically once the motor has cooled
• motor overload cutout has tripped
= check that the cables and relative
connections are not defective, check
that the pump is not blocked mechan-
ically, or whether the pump winding is
damaged (replace if necessary)
• electrical power line damaged =
replace
• Pump blocked mechanically = clean
• control device faulty = replace pres-
sure switch
• logic-Safe enabled.
the pump stops after a short interval of
operation due to a tripped motor pro-
tection device
• excessive current absorption = check
the operating condition of the pump
• if foreign bodies are present, block-
ing hydraulics = clean the hydraulic
components
• the single phase motor thermal cut-
out has tripped = this is reset auto-
matically once the motor has cooled;
check installation conditions
• thermal cutout protection setting or
fuses not suitable = check protection
devices with respect to rated current
of pump
• Power cable damaged = replace
component
• motor damaged = replace component
• logic-Safe enabled.
the pump starts up but does not deliver
liquid
• Pump is not primed = repeat the
"pump priming" procedure
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