NWC
611
16
1 MALFUNCTIONS SHOWN ON THE DISPLAY (FOR
THE TECHNICIAN)
The
warewasher
is
able
to
identify
a
number
of
malfunctions
and
show
them
on
the
display.
If
the
problem
persists
after
the
warewasher
has
been
switched
off
and
back
on,
proceed
as
described
below:
E.1
Boiler
temperature
probe
malfunction
Boiler
temperature
probe
disconnected
or
not
working
E.2
Tank
temperature
probe
malfunction
Tank
temperature
probe
disconnected
or
not
working
E.3
Water
intake
malfunction
Water
intake
not
completed
in
the
maximum
time
allowed
Check
dynamic
pressure
in
intake
system,
clean
water
intake
filter.
If
the
problem
persists:
‐
tank
pressure
switch
has
failed
(continuous
empty
reading)
‐
leak
from
pipe
connected
to
air
trap
‐
drain
siphon
blocked
‐
the
tank
is
empty
due
to
siphoning
when
the
drain
pump
is
not
running
E.4
Boiler
overheating.
Reduce
boiler
temperature
to
80°
Circuit
board
relay
failed,
check
circuit
board
and
inspect
boiler
heating
element
for
damage
E.5
Tank
overheating
Reduce
boiler
temperature
to
58°
Circuit
board
relay
failed,
check
circuit
board
and
inspect
tank
heating
element
for
damage
E.6
Water
not
pumped
out
of
tank
Inspect
the
filters
for
dirt
and
check
that
the
drain
hose
is
not
blocked,
bent
or
crushed.
Check
that
the
drain
pump
is
not
blocked
by
dirt
by
removing
the
insert
on
the
sump
(from
inside
the
tank)
If
the
problem
persists:
‐
with
tank
empty:
tank
pressure
switch
has
failed
(continuous
full
reading)
‐
with
tank
full:
drain
pump
failure
E.7
Boiler
heating
malfunction
(does
not
heat
up)
‐
circuit
board
relay
failure
‐
boiler
heating
element
faulty
or
"furred"
with
limescale
‐
boiler
temperature
probe
faulty
or
incorrectly
positioned
