ASCENTO • 37 Export St LYTTON QLD 4178 • P: 07 3893 5000 • © 2016
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IMPELLER MAINTENANCE
The complete impeller set is a wearing consumable part and is not covered by warranty unless it fails due to a
product fault. Regular inspections, cleaning and maintenance of the impeller is necessary to ensure longer
impeller life. If the impeller or impeller shaft becomes worn or damaged it should be replaced (available from your
local dealer). Failure to do so may cause serious damage to the pump.
1. Turn off the power supply and remove the plug from power-point before performing maintenance.
2. a) Isolate (turn off) the electricity supply to the pump.
b) Remove the pump from the pond – DO NOT PULL THE PUMP FROM THE POND BY THE ELECTRICAL CABLE.
c) Remove the filter assembly, if fitted.
d) Remove the impeller cover – for RP850 to RP4000 & RFK1100 to RFK8500 - by holding it and twisting the pump
body. For the RP6000 to RP28000 series – undo the screws and gently prise the cover off.
e) Remove the impeller assembly. Take care not to lose or damage the rubber bushes, and some impellers have a
small plastic washer at the end, loss of the washer will cause excessive vibration and noise and premature failure.
f) Do not take the impeller apart. It is not designed to be taken apart. If the impeller set does not work properly,
the complete impeller set will need to be replaced. If the ceramic shaft is broken, the impeller must be replaced.
These parts are available from your local dealer.
3. Wipe clean the complete impeller set to remove accumulated dirt, debris and deposits. Only rinse with water.
Do not use soap or cleaning agents to clean the pump or impeller set, however if there is a heavy build-up of lime
scale, follow step 4.
4. If necessary to de-scale the pump and impeller, follow the simple procedure below:
a) Remove the impeller following the steps listed at 2. a) to f) above.
b) Soak impeller assembly and motor overnight in domestic kettle descaler (readily available from Hardware stores
and Supermarkets) following the manufacturer’s instructions but DO NOT BOIL – use warm water only. After a
maximum of 12 hours, rinse and re-soak for a short period to remove any remaining residue of lime or algae scale
and rinse thoroughly. Repeat if necessary. Reassemble.
c) WARNING: - parts must be re-assembled in the correct order and surfaces must be clean.
DO NOT LUBRICATE IMPELLERS OR SEALS WITH ANYTHING OTHER THAN CLEAN WATER.
PUMP FILTER SPONGE MAINTENANCE
A filter sponge is supplied with some pumps to help prevent foreign objects entering the impeller chamber. Clean
the filter sponge in a bucket of pond water at least twice a month or as often as is necessary depending on the
conditions. Do not use soap or any other cleaning chemicals. The filter sponge is a wearing consumable part. If the
filter sponge is worn or damaged in anyway, it should be replaced (available from your local dealer). Failure to do
so may result in debris entering into and damaging the impeller set.
TROUBLE SHOOTING
Please follow these checks before returning for service, to save inconvenience to yourself.
1. PUMP STARTS & STOPS
Some pumps are fitted with a Thermal Overload (inside the motor unit) so that if the pump overheats, it will turn
off for a time and then restart, so check the following before returning for service.
a) Check impeller for damage, grit or blockages and reassemble if OK. Replace if damaged.
b) Clean filter foam if clogged or blocked.
c) Replace filter foam if worn or ripped.
d) Check pipe work for obstructions.
e) If all a) to d) are OK, return it to your nearest dealer if it is still in the warranty period, with your original
purchase documentation - or an acceptable substitute - for replacement or refund.
2. PUMP STOPS AND WILL NOT START
a) Check circuit breaker/safety switch is on.
b) If circuit breaker or safety switch has tripped:
i. Check plug and power outlet for water/dampness. If there is water in plug or power outlet, call an electrician.
ii. For low-voltage pumps check the cable connections for water or dampness as this will cause it to ‘short out’.
iii. If the cable is damaged, have it inspected and repaired by a licenced electrician.
iv. If 1),2) and 3) are OK and the circuit breaker/safety switch continues to trip, DO NOT USE THE PUMP. If it is still
in the warranty period, return it to your nearest dealer, with your proof of purchase documentation, for
inspection. The motor or the transformer (for low-voltage pumps) may be burnt out. If it is the Transformer, this
may be replaced.
3. FLOW FROM THE PUMP IS SLOW
