GÜDE 94686, Translation Of The Original Instructions, Page: 23 / 80

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HWW 900 GC ENGLISH
GB
Inspection and maintenance plan
Time interval Description Any other details
As needed Clean the check valve and the prefi lter. Check the check valve function.
Failures – causes - removal
Failures Causes Removal
Engine does not start No power supply.
Blocked pump wheel Turn the engine shaft with screwdri-
ver through the fan cover (to release
friction circles sealing that may be stuck
together).
Pump does not suck Missing, loose or blocked check valve
Check valve is not in water.
Pump without water
Too high suction head.
Air bubbles in the suction pipeline.
Connections not sealed, pump sucks air,
pump is not deaerated. Fix or clean the check valve.
Immerse the check valve into water.
Fill the pump shell with water.
Check the suction head.
Check the tighten of suction pipeline.
Carefully repeat connection according to
the chapter „Connection“!
Insuffi cient amount of
water pumped
Too high suction head.
Water level quickly drops down Check the suction head.
Clean the strainer., Position the check valve
lower.
Clean the pump and replace worn parts.
(qualifi ed workshop)
Reduced switching
intervals Air pressure in the receiver too low Control air pressure.
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