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Lockout codes
Lock-
Error
Description
out
code
0
EEPROM
Internal software error
Read Er-
ror
1
Ignition
Five unsuccessful ignition at-
Error
tempts in a row
2
GasValve
Failure detected in the gas
Relay Er-
valve relay
ror
3
Safety Re-
Failure detected in safety relay
lay Error
4
Blocking
Control had a blocking error
Too Long
for more than 20 hours
Error
5
Fan Not
Fan is not running for more
Running
than 60 seconds
6
Fan Too
Fan runs too slow for more
Slow
than 60 seconds
7
Fan Too
Fan runs too fast for more
Fast
than 60 seconds
8
RAM Er-
Internal software error
ror
9
Wrong
Contents of E2prom is not up
EEPROM
to date
Signature
10
EEPROM
Wrong safety parameters in
Error
E2prom
11
State Er-
Internal software error
ror
12
ROM Er-
Internal software error
ror
13
Air Switch
Air pressure switch not open-
Not Open
ing during pre-purge 0
14
Air Switch
Air pressure switch not closing
Not
during pre-purge 1
Closed
15
Max.
The external overheat protec-
Thermo-
tion is enabled or the T_Sup-
stat
ply sensor measures a temp.
Lock Error
of over Prot_Overheat_Temp -
SGOverheat_Duplex_Toler-
ance for a period of
Max_Value_Period
16
Max. Flue
Flue temperature exceeded
Lock Error
the maximum flue tempera-
ture
96
Cause
wrongly programmed BCU
or PB
no gas, wrongly adjusted
gas valve
short circuit in coil of the
gas valve, water on wiring
or gas valve
safety relay is not working
correctly
blocking code active for
more than 20 hours
electrical wiring not cor-
rectly connected, or Fan is
malfunctioning
electrical wiring not cor-
rectly connected, or Fan is
malfunctioning
electrical wiring not cor-
rectly connected, or Fan is
malfunctioning
wrongly programmed BCU
or PB
out dated E2prom
wrongly programmed BCU
or PB
wrongly programmed BCU
or PB
wrongly programmed BCU
or PB
electrical circuit is short cir-
cuited or APS is jammed
no air transport to the
burner; flue or air inlet is
blocked or APS is jammed
or air signal hose not con-
nected to the air intake pipe
or water in hose
Burner door clixon tripped
because of overheating of
the burner door or the wa-
ter flow is restricted or back
wall thermal fuse has
tripped because rear wall
insulation disc (combustion
chamber) is damaged or
broken.
There is no water in the
heat exchanger or flue gas
sensor is malfunctioning or
heat exchanger is over-
heated.
E93.1804.014
Solving
reset BCU or replace BCU and / or
display unit
check gas supply and adjust gas
valve, reset BCU
reset BCU replace gas valve or wir-
ing harness
reset BCU or replace BCU
reset and check blocking code
Check wiring or replace Fan if not
solved check fuse on BCU or re-
place BCU
Check wiring or replace Fan if not
solved check fuse on BCU or re-
place BCU
Check wiring or replace Fan if not
solved check fuse on BCU or re-
place BCU
reset BCU or replace BCU and / or
display unit
reset BCU or replace BCU
reset BCU or replace BCU
reset BCU or replace BCU
reset BCU or replace BCU
check wiring or replace APS
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 wa-
ter from the hose.
Check burner door gasket and re-
place burner door gasket and reset
clixon on burner door or check
pump and waterflow and replace
pump or increase water flow check
also if valves are closed or check if
rear wall fuse is broken if so re-
place and also replace rear wall in-
sulation disc (combustion cham-
ber).
Check if flue sensor is working cor-
rectly if not so replace flue sensor.
Check waterflow if to low increase
waterflow.
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