29
Faults and remedies
Fault
Cause
Remedy
Chapter/page
Pump not
running.
Power supply is interrupted.
►
Ensure correct power supply.
Time switch function does not start the
pump.
►
Wait for next pump start.
►
Change time setting.
Timer, p. 19
Power supply was interrupted.
►
Update time.
Timer, p. 19
Motor is defective (electrical/electronics).
►
Replace motor.
Rotor is blocked because the rotor bearing
is defective.
Rotor is blocked by debris.
►
Clean wetted parts.
Maintenance, p. 22
and further
Pump stops the
rotor continuously.
Air in the pump housing, dry run protec-
tion is active.
►
Bleed the circulation line.
Installation, p. 9 ff.
and Venting, p. 18
Pump makes
noise.
Air in the pump housing.
►
Bleed the circulation line.
Installation, p. 9 ff.
and Venting, p. 18
Rotor bearing defective.
►
Replace the rotor. If the bearing pin is
damaged exchange the motor.
Replacement,
p. 25 ff.
Non-return valve is loose.
►
Exchange the V-type pump housing or non-
return valve installed behind the pump
(e.g. RV 153).
Installation, p. 9 ff.
►
Observe the chapter “Safety” (see p. 3).
