Koshin PBX Serie Manual De Uso página 10

FAULTS AND HANDLING
Symptom Cause
No power supply
Power
Pump will
supply is
not turn
switched
on
Safety device is operating
(thermal protector)
Pump
Impeller locked due to entry
stops
by foreign matter
during op-
Rise in water temperature
eration
Incorrect frequency/voltage
Loss due to clogging or
bending of hose
Hose bore too small, hose
Decrease
too long
in pump
The pump is sucking in air
perfor-
mance
Worn impeller
Clogging inside pump
Pump head too high
Foreign matter clogging air
Air valve
valve
will not
close
The pump is sucking in air
Remedy
Connect to power supply
Power cord cut
or not contacting Inspection and repair at dealer
properly
Voltage drop Check extension cord
Impeller locked
due to entry by Clean strainer and casing
foreign matter
Water penetration
Inspection and repair at dealer
into motor
Inspect piping and pump to reduce the load
Clean strainer and casing
Lower water temperature
Check that the value on the model number plate
and the power supply are the same.
Wash the inside of the hose and remove bends
Use a hose with a wider bore, shorten hose
Increase water level
Replace impeller
Wash inside pump
Lower the pump head
Clean air valve
Increase water level
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