STERWINS 1300 JET SM5I-3 - Page 199

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8.4 TROUBLESHOOTING
product and keep other person away.
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Problems Probable causes Solutions
required
The Pump fails to
Start up
There is no electric current
Ensure that the electric current
is on
-
Pump shaft blocked.
Use a screwdriver to turn the
motor fan
bolt slightly
Pump does not
suck water
Suction hose is not in water Immerse suction hose in water
-
Pump head not filled with
water
Fill with water (as explained
on the chapter "priming the
pump")
Air in the suction hose
Make sure the suction hose is
well sealed
Check valve dirty or leaks Clean or replace the check valve
Strainer dirty or blocked Clean the strainer
Max. suction height
exceeded
Check suction height
Inadequate
delivery rate
Suction height too high Check suction height
-
Suction kit is dirty Clean the suction kit
Pre Filter is dirty Clean the filter
Water level falling rapidly
"Immerse intake valve deeper
and make
sure intake line well sealed."
Hose diameter and/or hose
length are not suitable with
the installation
"Use a larger hose diameter or a
shorter hose length"
The discharge head is too
high or there are too many
connected devices
Adjust the discharge head
and the connected devices
regarding the capacity of the
pump (please refer to technical
datasheet)
The pump stops
during operation
(Thermostat
switched pump
o)
"A solid body is blocking the
impeller"
"Connect discharge line to
water line,
disconnect suction hose, open
the water
line. Switch on the pump for
several times
for approx. 2 sec."
Water is too hot.
"Ensure water temperature
does not
exceed 35°C."
Pump running dry Immerse suction hose in water