Troubleshooting
E:\shares\Baprod\BA\subtec_m\general\us\troubleshooting.fm
9-1
9
Troubleshooting
In order to prevent damage or serious injury while rectifying machine faults, the following points
must be observed:
- Only attempt to rectify a fault if you have qualified staff. This means each job must be carried
out by trained specialist staff, for example electrical work must be performed by a trained
electrician.
- Always secure the machine against an accidental restart by disconnecting it from the electric
system. Take appropriate safety precautions.
- Always have a second person make sure the machine is switched off in an emergency.
- Secure moving parts to prevent injury.
- Independent work on the machine is at one's own risk and releases the manufacturer from
any warranty obligation.
Fault: The machine will
not start
Fault: The motor starts,
but the motor protection
switch triggers shortly
after start-up
Cause
Remedy
Electricity supply interrupted – short circuit or
earth connection in the cable or motor wind-
ings
Have the motor and wires checked by a spe-
cialist and replaced if necessary
Fuses, the motor protection switch and/or
monitoring devices are triggered
Have a specialist inspect the connection and
correct them as necessary
Have the motor protection switch adjusted
according to the technical specifications, and
reset monitoring equipment
Check that the impeller/propeller runs
smoothly. Clean it or free it as necessary
The moisture sensors (option) has interrupted
the power circuit (operator-related)
See fault: Mechanical shaft seal leaks, sealing
chamber monitor reports fault and switches
the machine off
Table 9-1: The machine will not start
Cause
Remedy
The thermal trigger on the motor protection
switch is incorrectly set
Have a specialist compare the setting of the
trigger with the technical specifications and
adjust it if necessary
Increased power consumption due to major
voltage drop
Have an electrician check the voltage on each
phase and rewire if necessary
Two-phase operation
Have a specialist inspect the connection and
correct it as necessary
Excessive voltage differences on the three
phases
Have a specialist inspect the connection and
the switching system and correct it as neces-
sary
Incorrect direction of rotation
Swap the 2 phases from the mains supply
Table 9-2: The motor starts, but the motor protection switch triggers shortly after start-up
