Unical BCM 2.0 - Page 12

12
3.5 - Error code
When the boiler detects a fault, the alarm symbol is displayed on the user interface display.
You can reset the boiler by pressing:
- key R from the user interface or key RESET from BCM.
CODE
DESCRIPTION
detected on BCM (HSC)
SOLUTIONS
9
EXTERNAL SENSOR (SE)
Enabled but not connected
Eect: No OTC
RESET: MANUAL/AUTO
13
DOMESTIC HOT WATER SENSOR
(S.acc DHW)
DHW sensor fault
Eect: DHW service not active
RESET: AUTO
Check the e󰀩ciency of the sensor (see Res/Temp table)
or its connections.
39
DAMAGED USER PARAMETERS
due to electromagnetic interferences.
Eect: none
RESET: AUTO
56
THE HSCP remote control
is connected by not detected.
It is possible to activate burner ignition from the BCM
manual request button (A)
02
GAS PRESSURE SWITCH
Insu󰀩cient gas pressure if LG param-
eter = 1
Eect: stop
RESET: AUTO
The ignition procedure is inhibited until gas pressure
reaches the correct values.
57
BMM BOARD NOT DETECTED
Eect: stop
RESET: AUTO
Check electrical connections BMM and e-BUS
29
WATER IN THE COMBUSTION
CHAMBER
Eect: stop
RESET: AUTO