E93.1803.901 HW
99
Lock-
out
code
Error
Description
Cause
Solving
18
INSTRUCTION_ ER-
ROR
Internal software error
wrongly programmed BCU
or PB
reset BCU or replace BCU and or
display unit
19
ION_CHECK_
FAILED
Internal software error
wrongly programmed BCU
or PB
reset BCU or replace BCU and or
display unit
20
FLAME_OUT_
TOO_LATE
Flame still present 10 sec-
onds after closing the gas
valve
wrong earthing of BCU and
boiler
Check earthing of BCU and boiler
21
FLAME_BE-
FORE_IGNIT
Flame is detected before ig-
nition
wrong earthing of BCU and
boiler
Check earthing of BCU and boiler
22
TOO_MANY_
FLAME_LOSS
Three time flame lost during
1 demand
bad gas supply or CO2 level
is not correct or bad ignition
rod
check gas supply pressure, check
CO2 level and adjust if necessary,
replace ignition rod or replace igni-
tion cable.
23
CORRUPTED_ ER-
ROR_NR
Error code RAM byte was
corrupted to an unknown er-
ror code.
wrongly programmed BCU
or PB
reset BCU or replace BCU and or
display unit
27
FILLING_TOO_
MUCH
Too many automated filling
attempts in a short time pe-
riod
If output is programmed as
filing valve and there are to
many filing attempts
Check if there is a leak in the central
heating system or if the boiler it self
is leaking also check expansion ves-
sel on internal leak
28
FILL_TIME_ERROR
Filling takes too long
If output is programmed as
filing valve and filling takes
more than 10 minutes
Check if there is a leak in the central
heating system or if the boiler it self
is leaking also check expansion ves-
sel on internal leak
29
PSM_ERROR
Internal software error
wrongly programmed BCU
or PB
reset BCU or replace BCU and or
display unit
30
REGISTER_ ERROR Internal software error
wrongly programmed BCU
or PB
reset BCU or replace BCU and or
display unit
32
T_EXCHANGE_
DIFF_ERROR
The 2
nd
exchange sensors
deviate too much for more
than 60 seconds
There is not enough water
flow through the heat ex-
changer
Check if the general pump is running
and if all valves are open to make
enough flow
33
LWCO_1_ ERROR
Low water cut off 1 error
There is no water in the heat
exchanger or not electrically
connected
Check if there is enough water in the
heat exchanger if not so fill up the
system
34
LWCO_2_ERROR
Low water cut off 2 error
There is no water in the heat
exchanger or not electrically
connected
Check if there is enough water in the
heat exchanger if not so fill up the
system
35
APS_NOT_CLOSED
_IN_POST_PURGE
Air pressure switch not clos-
ing during post-purge 1
no air transport to the burner
after heat demand; flue or air
inlet is blocked or APS is
jammed or air signal hose
not connected to the air in-
take pipe or water in hose
Check if there are any obstructions
in the flue or air intake, replace APS
if jammed, connect air hose to the air
intake pipe, remove any water from
the hose.
36
GAS_PRES-
SURE_ERROR
Gas pressure switch open
for
more
than
E2_GPS_Timeout
wrong gas pressure on gas
supply
Check if gas pressure is in limits of
the gas pressure switch.
Содержание CB 105 HW
Страница 69: ...E93 1803 901 HW 70 12 6 Electrical schematic...
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Страница 127: ...E93 1803 901 HW 128 22 SPARE PARTS CB 85 HW CB 105 HW and CB 125 HW exploded view...
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