6.5
C.H. MODE - FAULT FINDING (“FRIENDLY FORMAT 80” model)
Start from cold
Rotary switch set to WINTER position.
Room thermostat (if fitted) calling for heat and all D.H.W. taps off.
C.H. thermostat set to maximum position.
Clock in the on position (if fitted).
NOTE:
After completing fault finding reset the room thermostat (if fitted) to the required setting. If the appliance will not function
check the wiring to the clock and if necessary, replace the clock.
Is there power
at the external
socket?
Make
power
available
Does
the pump
start?
Does
the fan
start?
Is there a spark
at the ignition
electrode?
Is fuse
at mains
plug OK?
Is there power
at L and N
terminals?
Is smoke
pressure switch
connected right?
Check smoke
pressure switch
and fan
connection
Set properly
ignition probe
Is there continuity
between
ignition probe
and ground?
Make it free
to rotate
Replace fuse in
mains plug
Check wire
connections
to L and N
terminals
Is there voltage
available to the
pump?
Is smoke
pressure switch
closed?
Replace the
smoke pressure
switch
Is the smoke
pressure switch
contact in open
position?
Is pump
shaft free
to rotate?
Check pump
connection
Is limit
thermostat
calling for heat?
Replace the
limit thermostat
Replace
the pump
Is the room
thermostat
contact closed?
Is fuse F1 OK?
Is sensor
disconnected?
Connect
the sensor
Replace
sensor
Replace the fan
Replace
fuse F1
Set right
the contacts
Is there
continuity
between power
terminals of
PCB control
board and
PCB ignition?
Is sensor OK?
Check gap
between the
ignition electrode
and hood, check if
the electrode
lead and fit are
not damaged.
Does it now
spark?
Is there 230V
AC available
between 11 and
4 terminals
and between
11 and 10
terminals of PCB
ignition?
Replace the PCB
control board
Is there 230V AC
available at the
fan terminals?
Has the
PCB ignition
locked-out after
10 seconds
without flame
at the burner?
Has the
PCB ignition
locked-out after
10 seconds
with flame
at the burner
before lock?
Check the gap
between
ionisation probe
and hood;
check if the
electrode lead
and fit are not
damaged. Does it
now detect the
flame?
Can the burner
pressure be
reduced by the
C.H. ajuster?
Does the burner
pressure reduce as
the temperature
rises towards max.?
Check:
1) Limit
thermostat
2) C.H.
thermistor
3) PCB control
board
Is the burner
pressure set to
the maximum?
Replace the
C.H. thermistor
Does the
boiler switch
OFF before
achieving the
temperature
attainment?
Is there a
voltage at the
modulator?
Is the gas
available?
Open the
gas cock
Turn the plug
Replace the
modulator
Is the safety
thermostat OK?
Replace the
safety
thermostat
Boiler is
satisfactory
Is there
continuity
between the
PCB control
board and
the gas valve?
Replace the
gas valve
Set properly
the connection
Yes
No
Close the room
thermostat
contact
Yes
No
No
Yes
Yes
Yes
No
No
Yes
Yes
No
No
Yes
Yes
No
No
No
Yes
Yes
No
Yes
Yes
No
Yes
No
Yes
Yes
No
No
Yes
No
No
Yes
No
No
Yes
Yes
No
Yes
Yes
Yes
Yes
No
No
Yes
Yes
No
No
No
No
Yes
No
Yes
Yes
Yes
Yes
No
No
No
Yes
18
Содержание benchmark FRIENDLY FORMAT
Страница 1: ...Friendly Format Installation and servicing instructions GB ...
Страница 33: ...Friendly Format User instructions GB ...
Страница 34: ......
Страница 39: ......