Halm HEP Optimo L Montageanleitung Seite 20

d) Description of errors
Display at fault indication:
The error will be displayed in format "Ex" with "x" as error code 0-9. The
error codes blinks once every 0.5 seconds. Adjustements can not be
made while error status is shown.
Error code Cause
Excess
E1
temperature
Power supply
E2
voltage
Blocking
E3 Dry running
Motor or
electronic error
E4 Electronic error Electronics defect
dry Dry running
Error Cause
Pump does Rotor/shaft is blocked
not run
Noise Air in system
(> 43 dB (A))
Air in pump
Too much rate of flow
Cavitation due to less supply
pressure
Foreign material in pump
20
Description
Electronic component will not be cooled
enough
Power supply on the network side is too
high or too less
Impeller/shaft does not rotate
Air in pump
Motor or electronics defect
Switches off after 1 minute, vent pump,
switch to zero-potential, restart
Correction of defects
• Switch pump zero-potential.
• Remove air vent screw.
• Turn shaft with set screw driver (4mm) clockwise.
• Screw in air vent screw.
• Switch on pump
• Vent system.
• Vent pump.
• Reduce speed of pump
• Check operating pressure of system.
• Increase critical value of system analogous
• Clean housing.
Correction of defects
Check operating condition
Adapt power supply voltage
Unscrew air vent screw and un-block or
free shaft manually
Refill medium to be pumped, vent via air
vent screw
Replace pump
Replace pump
Refill medium to be pumped, vent via air
vent screw