9 Trouble-shooting
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Hya-Duo D FL
9 Trouble-shooting
WARNING
Improper work to remedy faults
Risk of injury!
▷
For any work performed to remedy faults, observe the relevant information
given in this instruction manual and/or in the product literature provided by the
accessories manufacturer.
NOTE
Prior to commissioning and maintenance work during the warranty period,
consultation with KSB Service is required. Non-compliance with this instruction will
lead to forfeiture of any and all rights to claims for damages.
If problems occur that are not described in the following table, consultation with the
KSB service is required.
A
Pump cuts out shortly after start-up in manual mode. Red indicator lamp signals lack
of water.
B
Fire-fighting system does not start up.
C
Pump running but not delivering water
D
Insufficient flow rate of the fire-fighting system
E
Discharge-side pressure too low.
F
Discharge-side pressure too high.
G
Leakage at mechanical seal.
H
Motor/pump overheated.
I
Motor protection switch triggered. Yellow indicator lamp is on.
J
Pump does not stop.
K
Pump starts too often (more than 30 starts per hour).
L
Broken wire and short-circuit monitoring relay indicates a broken wire.
M
Broken wire and short-circuit monitoring relay indicates a short circuit.
N
Green lamp and yellow lamp light up simultaneously and pump is running.
Table 14:
Trouble-shooting
A B C D E
F G H
I
J
K L M N Possible cause
Remedy
2)
-
-
✘ ✘
-
-
-
✘
-
✘
-
-
-
- Pump / piping not vented and/or
primed
Vent and/or prime.
✘ ✘ ✘ ✘ ✘
-
-
✘
-
-
-
-
-
- Shut-off valves fully or partially
closed
Check, open as necessary.
✘
-
-
✘ ✘
-
-
-
-
✘
-
-
-
- Strainer / dirt trap clogged
Clean.
-
-
✘ ✘ ✘ ✘
-
-
-
-
-
-
-
- Inlet-side shut-off valve closed
Check, open as necessary.
-
-
-
-
-
-
-
✘
-
✘
-
-
-
- Discharge-side shut-off valve
closed or defective
Check, open as necessary.
✘
-
-
✘ ✘
-
-
✘
-
✘
-
-
-
- Inlet pressure lower than stated
in the purchase order
Contact the manufacturer.
-
✘
-
-
-
✘
-
-
-
-
-
-
-
- Inlet pressure higher than stated
in the purchase order
Contact the manufacturer.
✘
-
-
✘ ✘
-
-
-
-
✘
-
-
-
- Start-up pressure set too high
Check setting.
-
-
-
-
-
-
-
✘
-
-
✘
-
-
- Pre-charge pressure of the
accumulator too low
Restore nitrogen cushion.
2)
Before any work on pressure-retaining components, release the pump set pressure and de-energise the pump set.
