Troubleshooting
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Failure
10 Troubleshooting
10.1 Failure
If problems or repairs can not be clearly identified or solved please contact
the customer service department or your Rosenbauer representative.
The following list offers an overview of possible faults. The list is not com-
plete, but in the event of a malfunction it can be helpful in localising and rec-
tifying the fault.
10.1.1 Portable pump
Fault Cause Remedy
Pump does not suck The priming pump is not
switched on
Switch on priming pump
Suction lift too high Reduce suction lift
Suction strainer not below
water
Place suction strainer below water
Blocked suction strainer Clean suction strainer
Suction hose defective or
suction seals poorly inserted
or damaged
Insert or replace suction hose gaskets
properly
Blocked suction sieve Clean suction sieve
External suction valve closed Opern external suction valve
Drain cock not closed Close drain cock
Pressure valve leaks are
caused by foreign bodies or
damaged valve seals
Clean pressure valve (rinse with purified
water) or change the valve seal
Torn or oily v-belt Clean or replace V-belt
Pump suction weak Input and/or exhaust valves of
the priming pump are dam-
aged
Change input and/or exhaust valves
Pump is noisy and vi-
brates
Suction lift too high Reduce suction lift
Pump cavitates Reduce speed and nozzle diameter; clean
suction strainer and suction sieve
Pump has low perfor-
mance
Blocked suction strainer Clean suction strainer
Suction hose defective or
suction seals poorly inserted
or damaged
Insert or replace suction hose gaskets
properly
Blocked suction sieve Clean suction sieve
Engine power weak Check propulsion engine
Pressure valve not fully open Open the pressure valve completely
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