Trouble-Shooting - KSB MSE Operating Manual

Table 9: Trouble-shooting
A B C D E Possible cause
✘ - - - - Manual-0-automatic selector switch set to 0.
- - - - Amber lamp at motor protection relay is lit.
✘
✘ - - - - Thermal circuit breaker not connected or not
provided
- - - - Water level below start-up level
✘
✘ - - - - Power cable of control unit does not supply
power.
- ✘ - - - Motor protection relay has tripped.
- - - - Thermal circuit breaker not connected or not
✘
provided
- - - Thermal circuit breaker has tripped.
✘ ✘
- - - - Incorrect setting of motor protection relay
✘
- - - ✘ - Thermal circuit breaker has tripped.
- - - ✘ - Phase failure
- - - - ✘ Float switch is stuck.
- - - - ✘ Incorrect pump selection
- - - - ✘ Manual-0-automatic selector switch is set to
manual.
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8 Trouble-shooting

8 Trouble-shooting
WARNING
Improper work to remedy faults
Risk of injury!
▷ For any work performed to remedy faults, observe the relevant information
given in this operating manual and/or in the product literature provided by the
accessories manufacturer.
If problems occur that are not described in the following table, consultation with the
KSB service is required.
A Pump is running, but does not deliver
B Fault indication lamp is lit
C Pump has started, but stops above stop level
D Fault indication lamp is lit after pump start-up
E Pump does not stop.
MSE/MSD
Remedy
Set manual-0-automatic switch to automatic.
Press the reset key of the motor protection relay.
Connect the thermal circuit breaker; if it is not
provided, connect supplied bridge to 1 and 2.
Wait for inflow, then check again.
Check power supply.
Check pump.
Connect the thermal circuit breaker.
If no thermal circuit breaker is provided, connect
supplied bridge to 1 and 2.
Pump will re-start after cooling down.
If the thermal circuit breaker trips repeatedly,
have the pump and motor mechanically and
electrically checked by KSB Service.
Set it to the rated current of the motor.
Pump will re-start after cooling down.
If the thermal circuit breaker trips repeatedly,
have the pump and motor mechanically and
electrically checked by KSB Service.
Check power cable.
Release and check for free movement.
Have it checked by KSB Service.
Set the manual-0-automatic selector switch to
automatic.