SSB 6720866942 (2018/06) US
Operation | 37
6.3.6 Error Screen
For each boiler, the Error screen shows the list of the last 48 errors
occurred on its own modules.
The errors are listed in chronological order.
Fig. 57 Error screen
6.3.7 Service Screen
The Service screen shows the main parameters of the Service Reminder
function.
Fig. 58 Service screen
The Service Reminder will remind the owner/user of the appliance to
service the appliance at a specied Service_Interval (factory setting).
When service is not done within the specied time, a service reminder will
be shown on the screen, alternating with the normal status display.
The Service_Interval can be set as the number of burn hours or the
number of operational (appliance is powered) hours.
This can be done by setting the Service_Hour_Counter (factory)
parameter.
When the Service Reminder is active, the time before service is actually
done is logged by the 900PB (in hours). This time is called the Service
Overdue time. With this log the factory can read back how long service
was overdue on the system/appliance which can be useful when handling
warranty claims.
A maximum of 15 Service moments can be logged by the 900PB, when
the log is full it will overwrite the oldest log entry.
Each time the Service Reminder is being reset, a new service moment is
counted and the Service Overdue counter will be stored in the log/history.
There are two types of service reminders: (Normal) Service Reminder
and Service Shutdown.
The (normal) Service Reminder will only show the service reminder
message on the screen and will log how many hours the service is
overdue, and the appliance will remain fully operational.
The Service Shutdown has the same functionality as the Service
Reminder but will shut-down the appliance after the specied Service_
Shutdown_Period (factory setting) after the service reminder became
active (message is displayed).
The owner/user has a warning before the appliance will actually
shutdown. Re-enabling the appliance is only possible by resetting the
Service Reminder (Shutdown) which is done by the installer.
6.3.8 Module Test Screen
This screen is designed to support the installer and service activities.
When pushing the Module Test button on Module screen, a new set of
buttons appears on the left side of the screen.
Fig. 59 Module Test Screen
Setup, adjustments and checks of combustion parameters can be done
using the Low Power, Ignition Power and High Power buttons.
Pushing the LWCO test button the system carries out the Low Water Cut
Off functionality test.
Fig. 60 LWCO test button Screen
In addition, the High Limit button allows to carry out the high limit
temperature switch functionality test.
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