Pentair Jung Pumpen 120/2 M 300 E 400 E Instructions De Service page 12

ENGLISH
decreases (the pump tends to become
blocked), the impeller and cutting system
must be checked for wear by an expert and
replaced if necessary.
Using a suitable tool, e.g. feeler gauge, the
cutting clearance between the cutting ro-
tor and the cutting plate can be measured.
A cutting clearance of over 0.2 mm must be
reduced.
Adjustment of the cutting clearance
1. Block the cutting rotor with a piece of
wood and unscrew the central hexagon
socket screw.
2. Take off the compression piece, the cutting
rotor and an adjusting washer and then at-
tach the compression piece and the cutting
rotor again.
3. Block the cutting rotor and tighten again
with the hexagon socket screw (tightening
torque 8 Nm).
4. Check the freedom of movement of the
cutting rotor and the cutting clearance again
(max. 0.2 mm).
If the cutting clearance is still too big, a fur-
ther adjusting washer must be removed.
Steps 1-4 must be repeated.
QUICK TIPS FOR
REMEDYING FAULTS
The unit isn't working
∙ Check the mains voltage, the fuse and the
ground fault circuit interrupter. Replace
defective fuses only with fuses with the
same nominal value! If the fuse triggers
again, call a qualified electrician or our
customer support service.
∙ The internal 2 A glass tube fuse (delay) for
the 230/12V control transformer, the mo-
tor contactor and the 230V AC power sup-
ply are faulty. Replace defective fuses only
with fuses with the same nominal value!
∙ If the mains cable is damaged, it may only
be replaced by the manufacturer.
∙ If the float switch is obstructed, close the
inlet shut-off valve, open the maintenance
cover and clear the blockage.
12
If the alarm is triggered and the unit does
not work:
∙ The thermostat in the motor windings may
have switched off the system because the
pump is obstructed. In this case, close
the shut-off valve at the inlet, drain the
tank, pull out the mains plug, remove the
pump module, and clear the blockage.
Decreased pumping performance
∙ Check that the shut-off valve in the pres-
sure pipe is fully open.
∙ If the pressure pipe is blocked, flush water
through the pressure pipe to clear it.
∙ If the non-return valve is blocked, empty
the pressure pipe and clean the non-re-
turn valve.
∙ If the ventilation system is blocked, clean
the ventilation hose that leads from the
pump tank and check the drilled holes.
∙ If the unit works normally when it starts
pumping, but becomes very loud towards
the end, then a qualified electrician must
redefine the switch-off point in the con-
trol unit.
Indicator "Drehfeld falsch" (Wrong rotat-
ing field) lights up
∙ Mains phase sequence is wrong or phase
is absent - thus lower or absent pump
delivery. The mains connection must be
corrected by a qualified electrician only.
Indicator "Störung Pumpe" (Pump failure)
lights up (not compli 300)
∙ The pump is protected by an integrated cir-
cuit breaker which switches off the pump if
it overloads or if there is an electric motor
fault. After this has been triggered, the
control unit has to be opened by a quali-
fied electrician in order to press the reset
button.
Indicator "Hochwasser" (High water)
lights up (not compli 300)
∙ Water level in the tank too high because
of low pump flow rate or excessive inflow.
Remove any obstructions in the pump or
pressure pipe and/or eliminate the exces-
sive inflow.
LED P1 on the analogue evaluator is per-
manently lit up (not compli 300)
∙ There is a fault in the level monitoring.
Call our customer support service.
∙ There is no water left in the tank. Fill with
a small amount of water.
∙ Note: If the LED lights up briefly after the
pumping operation, this is not a sign of a
malfunction.
Pump "snores" and does not switch itself
off (not compli 300)
∙ The switch-off point of the unit is too low.
Unscrew the three fixing screws on the lev-
el monitoring at the front of the collecting
tank. By carefully rotating it to the right the
switch-off point can be set to a higher level.
Retighten the screws. The switch-off level
is reached during pumping when the LED2
goes off.
Attention! It may also be necessary to re-
adjust the switch-on level (please refer to
the section "Redefining the switch-on level").
Note: If the normal snoring noise is per-
ceived as intrusive, the switch-off point can
also be set to a higher level in this way.