HEROSE 06001, Operating Instructions Manual

Page: 28 / 84

Operating instructions
22 Phone +49 4531 509-0
7.3 Fault table
Fault Cause Remedy

Overflow valve
does not respond
Covers have not been
removed;

Remove covers.
Test pressure too high;

Replace the overflow valve.
Back pressure not taken into
account;

Replace the overflow valve.

Not liftable
Pressure below 85% of the set
pressure;

Lifting in the range ≥85 % of the set
pressure without aids.

Leak in the seating
Foreign bodies between cone
and seating, contaminated
medium;

Remove foreign bodies by briefly
lifting / flush the system or replace
the overflow valve.
Seating damaged;

Replace the overflow valve.
Cone seal damaged;

Replace the overflow valve.
Overflow valve has fluttered;

See “Chattering”.

Damage to the
inlet/outlet
Transport damage;

Replace the overflow valve.
Wrong connecting thread /
tightening torque too high;

Replace the overflow valve.
Impermissible forces such as
bending or torsional forces are
being transmitted;

Install stress-free.

Shock waves
Overflow valve not fitted at the
highest point;

Install the overflow valve at the
highest point.
water not drained correctly or
at all;

Attach water drain according to
regulations.

Constantly blowing
off
Spring corroded by
impermissible medium and
broken;

Replace the overflow valve.
System pressure too high

Replace the overflow valve.
Seal damaged;

Replace the overflow valve.

Chattering
Pressure drop in the inlet line
>3%;

Reduce resistance through chamfer
or radius in the connecting socket;
choose a larger one if necessary.

Shorter inlet line.

Incorrect overflow valve, replace it.
Seals for inlet and outlet
connector too small or not
installed centrally;

Change conditions.
overflow valves are too highly
rated;

Select smaller overflow valves.
Outlet line too long or diameter
too small;

Use a larger nominal diameter or a
back-pressure-compensating
stainless steel bellows. The max.
height is to be specified by the
manufacturer.
Inlet or outlet connector too
small;

Dimensions must be larger than the
nominal inlet or outlet diameter.
Back pressure higher than 3%;

Use back-pressure-compensating
stainless steel bellows. The max.
height is to be specified by the
manufacturer.

Inadequate
capacity
overflow valves incorrectly
configured for the plant
conditions;

Re-dimension and replace the
overflow valve.
Overflow valves not being used
in accordance with the
applicable regulations;

Change conditions.