E03
''OVERHEAT
TEMPERATURE''
It occurs
when
supply
or return temperature
s
are
over 90
°
C.
Check
whet
h
er
isolating
valves of
boiler are
open
Open the valves.
Press ''Reset'' Button.
YES
NO
Open
at least 1 radiator
valve
Press ''Reset'' Button.
NO
If boiler gives
this error in winter mode,
check
at least 1
radiator
valve
is
open.
YES
If not proper, replace
them.
Press ''Reset'' Button
NO
Temperature sensors may be
broken.
Remove temperature
sensors for
supply
water and
return water. Check whether
resistance values
are
correct.
Internal bypass may
be
not functional. Replace the
3-Way Valve Shaft G
r
oup.
Check
whether error is gone
after Reset
YES
Pump connection cables
may
be
not mounted, or
there may be a loose
contact. Check
the cables
If there is any problem
replace the cables.
Press ''Reset'' button
YES
NO
Check there
is
clogging
in
installation
.
Observe
temperature changes operating
boiler both in winter
and summer modes
Clean the radiator
system.
YES
Check circulation
pump works or not
.
NO
If pump is
broken
,
replace the pump.
NO
YES
Main
board
of the
boiler
may be
broken
. Replace
the
main
board.
NO
26
