8
Troubleshooting
Faults that are not specified in the following table or which are not traceable to
one of the specified causes should be discussed with ITT Bornemann GmbH.
The list of possible faults are given with a number in the following table. This
number can be used to look up the cause and measure for rectification in the
faults table.
Fault
Number
Pump fails to convey.
1
Pump conveys insufficiently.
2
Pump conveys excessively.
3
Pump runs unevenly or extremely loudly.
4
Pump jams.
5
Pump leaks.
6
Power consumption of the motor too high.
7
Fault table
Fault number
Cause
Remedy
1 2 3 4 5 6 7
X X - - - - - Excessive play between:
n
Feed screws
n
Feed screws and casing
n
Repair or exchange worn parts.
n
Consult with ITT Bornemann GmbH.
X - - X - - - Delivery/inlet line closed by valve.
n
Fully open valves.
X - - X - - - Pump not completely filled.
n
Completely fill pump (
X X - X - - - Speed too low.
n
Increase speed with speed regulator.
X X - X - - - Delivery/inlet line, pump or filter blocked or
encrusted.
n
Clean delivery/inlet line, pump or filter.
n
Check filter mesh size and change if necessary,
in consultation with ITT Bornemann GmbH.
X - - X - - - Uncontrolled opening of the safety valve.
n
Check and, if necessary, adjust the safety valve
setting.
X - X X - - - Pump direction of rotation incorrect.
n
Check and, if necessary, adjust the drive's direc-
tion of rotation (
direction of rotation’ on page 45
).
X - - X X - X Pump contaminated.
n
Consult with ITT Bornemann GmbH.
X X - X . . X Outlet line blocked.
n
Clean outlet line.
X X - X X X X Connecting screws not properly tightened.
n
Tighten connecting screws.
X X X X X X X Viscosity or temperature of the conveying medium
deviates from the pump's design data (
pump
datasheet).
n
Consult with ITT Bornemann GmbH.
- X - X - - - Cross section of the inlet or outlet line too narrow.
n
Increase cross section.
n
Clean inlet or outlet line of deposits.
Troubleshooting
70
Type SLH-4U
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JP Rev. 1
