Cetetherm Mini Plus CM737
Installation, service and operating instruction
31
14
Fault finding pump
Before starting any work at the pump, switch off the power supply. Make sure that the power
supply cannot be switched on accidentally.
Be aware that capacitors will be live up to 30 seconds after the power supply has been switched
off.
Fault
Cause
Remedy
Pump is not running.
No power supply
•
System is switched off.
Check the system controller.
•
A fuse in the installation is blown.
Replace the fuse.
•
The circuit breaker has tripped.
Check the power connection and
switch on the circuit breaker.
•
Power supply failure.
Check the power supply.
Pump is not running.
Normal power supply.
•
Controller is switched off.
Check the controller and its
settings.
•
Pump is blocked by impurities.
Remove impurities. Deblock the
pump from the front of the control
box with a screwdriver
•
Pump is defective.
Replace the pump.
Noise in the system.
•
Air in the system.
Vent the system.
•
Differential pressure is too high.
Reduce the pump performance at
the pump or external controller.
Noise in the pump.
•
Air in the pump.
Let the pump run. The pump
vents itself over time.
•
Inlet pressure is too low.
Increase the system pressure or
check the air volume in the
expansion tank, if installed.
Insufficient flow.
•
Pump performance is too low.
Check the external controller and
the pump settings.
•
Hydraulic system is closed or
system pressure is insufficient.
Check the non-return valve and
filter. Increase the system
pressure.
14.1 Fault finding UMP3 pump
Fault
Cause
Remedy
Pump LED5 is on. Pump
tries to restart every 1.5
sec.
•
Rotor shaft is blocked
Deblock the rotor shaft by
pushing it with a screwdriver from
the front of the pump.
Pump LED4 is on.
•
Pump is running.
Check the supply voltage.
Pump LED3 is on. Pump
stops.
•
Supply voltage is too low.
•
Serious failure.
•
Check the supply voltage.
•
Exchange the pump.
