Worcester CDi Combi N.G Service Booklet page 22

BOILER SERVICE FUNCTIONS - CDI COMBI & SYSTEM BOILER
4.F SYPHON-FILL PROGRAMME
The syphon filling function ensures that the syphon trap
is filled when the appliance is first installed or shut down
for a long period. Flue gas is prevented from escaping
into the room that the appliance is installed.
The syphon filling function is activated when:
• the appliance is switched on at the main switch
• the burner has not been in operation for at least
48 hours
• the appliance is switched from summer to winter
mode
The next time the heating or hot water system calls for
heat, the appliance is held at minimum output for
15 minutes.
The syphon filling programme remains active until the
appliance has completed 15 minutes of operation at
minimum output.
The 2-digit display alternates between
flow temperature.
If the syphon is not filled, flue gas can
escape!
B Only deactivate the syphon filling
programme in order to carry out
servicing work.
B Always re-activate trap filling
programme once servicing is complete.
5.A RESET SERVICE REMINDER
The burner service interval of 2324 hours has run out.
After the service inspection store 0 for resetting the
service interval.
5.B FAN OVER-RUN TIME
Set the time of fan over-run after a boiler demand.
6.A LAST FAULT
The last fault can also be recalled for servicing purposes
when the appliance is functioning correctly.
6.D ACTUAL FLOW RATE TURBINE (COMBI ONLY)
The actual flow rate of the turbine is displayed.
6.E PROGRAMMER INPUT
Shows the status of channel 1 of the timer DT10/20.
Left digit is "Heat demand", heating mode will be
activated according to the programmer commands.
Shows the status of channel 2 of the timer DT20.
Right digit is "DHW demand", hot water mode will be
activated according to the programmer commands.
7.A FAULT INDICATOR LED ON/OFF
The fault indicator LED flashes in case of error even
when its setting is off (0).
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5.3.2
8.A SOFTWARE VERSION
The version number of the software is displayed.
8.B CODE PLUG
The 4-digit part number of the code plug (digits no. 7 up
to 10 of order no.) is indicated.
The code plug determines the appliance functions. If the
appliance is converted from natural gas to LPG or vice
versa (using conversion kit) the code plug also has to be
changed.
8.C GFA STATUS
(not applicable)
8.D GFA ERROR
(not applicable)
8.E RESET ALL PARAMETERS
and the CH
Set all parameters to factory setting. See also
section 3.6.
8.F PERMANENT IGNITION
This function allows permanent ignition without gas
supply to be activated for the purposes of checking the
ignition mechanism.
9.A OPERATION MODE PERMANENT
Set a fixed operation mode even when boiler has been
switched off.
9.B ACTUAL FAN SPEED
The current fan speed is displayed in Hertz (Hz).
9.C ACTUAL HEAT OUTPUT
The actual heat output of the appliance at the time
viewed is displayed.
9.D START FAN SPEED
The actual start fan speed between 45 and 55 Hz is
displayed in Hertz (Hz).
9.E TURBINE SIGNAL DELAY (COMBI ONLY)
Set a delay time relates to the beginning of DHW demand
to avoid an undesired demand by water surge hammer.
9.F PUMP OVER-RUN TIME (CH MODE)
Set the time of pump over-run after the end of a heating
demand.
SECOND SERVICE LEVEL
Do not run for more than 2 minutes!
8 716 115 748 (2009/09)