Delfin MTL202DS - Page 39

Spare parts Section
- 36 - EN
Pump
Fault found
Possible fault
Recommended remedy
Pump not operating
motor fails to start
No power
Automatic switch tripped or
fuse burnt out
Overload switch tripped
Faulty condenser
Impeller blocked
Power the machine
Reset the switch or replace
the
fuses with other suitable
ones.
Resets automatically after
cooling in single-phase
version
Change the condenser
Foreign bodies between the
fixed and rotating parts of
the
pump
Pump not operating
motor starts
Liquid level dropped and
bottom valve no longer
under water
Pump not filled with liquid or
drained due to leaks
Be careful, the mechanical
seal
could be damaged.
Be careful, the mechanical
seal
could be damaged
Pump operates at reduced
flow rate
Difference in pumping level
above pump capacity or
flow
resistance too high during
suction
Pump or pipe blockages
Replace the suction pipe
with
one of bigger diameter.
Reduce
elbow bends to a minimum.
Eliminate deposits.
Clean or remove blockages
Pump stops after short
periods
Overload switch tripped
Pump not turning freely.
Viscous liquid.