9
8. Fault finding chart
8.1 Emergency operation
In case of damage to electronic components belonging to the
printed circuit board, the system can be operated by moving the
multiplug from J2 to J4, see fig. 10.
Pumps will still operate automatically by pressure switches but
without LED indications and the alternation function.
Maximum pressure and dry-running protection are not active
when the booster set is in emergency operation.
Fig. 10
Before making any connections in pumps, terminal boxes or control box, the electricity supply must be switched off.
Fault
Cause
Remedy
1.
Motor does not run
when started.
a) Electricity supply disconnected.
Connect the electricity supply.
b) Automatic circuit breakers cut out.
Correct the fault and cut in the automatic circuit break-
ers.
c) Fuse in the CS 1000 defective.
Replace the fuse.
d) Motor defective.
Repair/replace the motor.
2.
Motor starts, but stops
immediately after-
wards.
a) Incorrect setting of pressure switch.
Increase the cut-out pressure and/or differential
pressure.
b) Wrong diaphragm tank precharge pressure.
Check the diaphragm tank precharge pressure.
3.
Frequent starts and
stops.
a) Incorrect setting of time delay TR 2.
Set the time delay TR 2 accordingly.
b) Incorrect setting of pressure switch.
Increase the cut-out pressure and/or differential
pressure.
c) Diaphragm tank defective.
Repair the diaphragm tank.
4.
Pumps are running but
deliver no water.
a) Suction pipe/pumps blocked by impurities.
Clean the suction pipe/pumps.
b) Non-return valve blocked in closed position.
Clean the non-return valve.
c) Suction pipe leaky.
Repair the suction pipe.
d) Air in suction pipe/pumps.
Vent the pumps. Check the suction pipe for leakages.
e) Motors running with the wrong direction of rota-
tion.
Change the direction of rotation.
5.
Leakage from the shaft
seal.
a) Shaft seal defective.
Replace the shaft seal.
b) Height adjustment of the pump shaft inaccurate.
Readjust the shaft height. See installation and oper-
ating instructions for CR pumps.
6.
Noise.
a) The pumps are cavitating.
Clean the suction pipe/pumps and possibly the suc-
tion strainer.
b) The pumps do not rotate freely (frictional
resistance) due to inaccurate height adjust-
ment of the pump shaft.
Readjust the shaft height. See installation and oper-
ating instructions for CR pumps.
TM
0
0
9
742
0
397
J2
J4
J2
J4
