126
Fault mes-
sage
Cause Remedy Re-
set-
ting
"164: Flow
press switch
HC"
Flow sensor does not show
any throughput.
Check installation and con-
necting cable for flow sen-
sor.
Check the system pressure.
Vent the heating system.
Check whether there is any
throughput (code 8366 in di-
agnostics heat generation)
Check function of the circula-
tion pump.
Check function of 3-way
diverter valve.
AR
"187: Con-
figuration
output"
Output configuration faults. Reconfigure system.
Check code 5700, reset if
necessary.
Check whether all connected
components (temperature
sensors, mixer extensions,
remote control unit etc.) have
been detected.
"253: Fault
cause am-
biguous"
Stirling burner or auxiliary
burner control unit have de-
tected a problem on start-up.
Carry out a service reset and
restart. If the fault has not
been rectified, replace the
control unit PCB (see
page 138).
SR
"254: Un-
known error
code"
Fault without a defined fault
code.
"257: Pack
sensor"
Short circuit or lead break to
internal appliance tempera-
ture sensor.
Check connections to plug
X205. Check internal appli-
ance temperature sensor
(see page 145).
"258: Pack
overtem"
Internal appliance tempera-
ture exceeds maximum val-
ue.
Check balanced flue system.
Ensure that flue gases are
not being recirculated.
AR
"259: CJC
sensor"
Temperature sensor inside
the control unit reports a
fault.
Carry out a restart. If the fault
has not been rectified, re-
place the control unit PCB
(see page 138).
SR
Troubleshooting
Fault messages
(cont.)
5618 294 GB
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