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10. Troubleshooting
During the warranty period consult the manufacturer before performing
maintenance work on the system (only work that is required for start-up
and maintenance).
Our customer service department is at your service. Failure to comply
will lead to loss of any liablity claims.
Errors
Pump is running but does not suck
Pump turns frequently on and off
Pump is running, feed rate or pressure are not
sufficient
Pump shuts down during operation and indica-
tes malfunction
System does not turn on
System does not turn off
System is too loud
Tank overflows
10.1 Measures for elimination of pressure surges
10.1.1 Enlargement of the inlet line
According to DIN 1988, Part 3, for amounts > 0.5l/s a minimal pipe inner
diameter of 20mm is to be selected.
10.1.2 Setting pressure reducing valve
If static pressure of 5bar can be read on the pressure gauge and the pres-
sure drops to 2.5bar when the valve is opened, then the static pressure must
be lowered by 1bar. Pressure surges occur by pressure differences larger
than 2bar.
10.1.3 Throttle pressure surge
If a stop valve or pressure reducing valve is installed in the drinking water
line upstream of the system, then it has to be throttled until the pressure
surge disappears. The disadvantage of this method is the small feed
amounts. It must be checked, whether the feed amount is sufficient for
normal use. The water shortage monitor, however, must not be activated at
maximal withdrawal. Should the water shortage monitor nevertheless be
activated, then the downstream side must be throttled as well.
10.1.4 Membrane pressure expansion vessel
Install an 8l - membrane pressure expansion vessel in the line ahead of the
system inlet. With this container, severe pressure drops from thin lines are
diminished and surges are contained without throttling the amount.
Honeywell GmbH
GB
Possible cause
Pump is not full
Tank inlet closed
Leaky consumer
Pump draws in air
Power outage or undervoltage
Thermo switch has triggered due to overhea-
ting
ELCB (earth leakage circuit breaker) has trig-
gered
Pump control indicates malfunction
Foreign particles in pump control
Pump lies against the safety screws
Contamination in valve
13
Elimination
Fill pump
Open tank inlet
Seal consumer
Suction line check
Check power supply
Check that pump moves freely
Have insulating resistance checked by a trai-
ned electrician
Press Reset-key or disconnect mains voltage User
Clean pump control and replace if necessary Service
Adjust pump by hand, so that the pump is not
lying against the screws
Eliminate dirt/limescale in valve and replace
floater if necessary
Translation of original - EN1H-1377GE23 R1114
by
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