DP Pumps Hydro-Unit Premium Line F, Installation & Operating Manual

Page: 54 / 64

54 / 64
9 Trouble-shooting
WARNING
Improper work to remedy faults
Risk of injury!
Ø 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
Before performing any work on the pump's internal parts during the warranty
period please always consult the manufacturer. Our after-sales service will be
at your disposal. Non-compliance 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 DP
service is required.
A
Pumps fail to start in automatic mode or cut out shortly after start-up. Lack of water is
indicated.
B
Pressure booster system does not start up.
C
Pumps running but not delivering water.
D
Insufficient delivery of pressure booster system.
E
Discharge-side pressure too low.
F
Discharge-side pressure too high.
G
Leakage at mechanical seal.
H
One/several pumps/motors overheated.
I
Motor protection switch(es) triggered. Warning LED lit.
J
Pump(s) do(es) not stop.
K
Pumps start too often (more than 30 starts per pump and hour).
L
One/several pumps/motors overheated.
Table 18: Trouble-shooting
A B C D E F G H I J K L Possible cause
Remedy
6)
- - ✘ ✘ - - - ✘ - ✘ - - Pumps and/or piping are not completely
vented or primed. Vent and/or prime.
✘ ✘ ✘ ✘ ✘ - - ✘ - - ✘ - Shut-off valves (partially) closed Check, open as necessary.
✘ - - ✘ ✘ - - - - ✘ ✘ - Strainer clogged (inlet-side pressure
reducer) Clean.
✘ - - ✘ ✘ ✘ - - - ✘ ✘ - Inlet-side pressure reducer set
incorrectly Check, adjust as necessary.
- - ✘ ✘ ✘ - - ✘ ✘ ✘ ✘ -
-
Check valve in bypass line defective Replace.
✘ ✘ - - - - - - - - - - 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 KSB.
- ✘ - - - ✘ - - - - - - Inlet pressure higher than stated in the
purchase order Contact KSB.
6) The pump pressure must be released before attempting to remedy faults on parts which are subjected to pressure.
Disconnect the pump from the power supply!