Mode - Fault Finding ("Friendly Format 80 E - 100 E" Models) - Sime benchmark FRIENDLY FORMAT Installation And Servicing Instrucnions

6.6 C.H. MODE - FAULT FINDING ("FRIENDLY FORMAT 80 E - 100 E" models)
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).
No
Is there power Make
at the external power
socket? available
Yes
Yes
Is there power
Is fuse
at mains at L and N
plug OK? terminals?
No No
Check wire
connections
Replace fuse in
mains plug to L and N
terminals
Close room
Replace
thermostat
fuse F1
contact
No No
Yes
Is the room
Is fuse
thermostat
F1 OK?
contact closed?
Yes
Check pump Set right
the contacts
connection
Replace the PCB
control board
No
No
Has the PCB
Has the PCB
ignition
ignition
locked-out after
locked-out after
10 seconds
10 seconds
with flame
without flame
at the burner
at the burner?
before lock?
Yes
No
Open
Is the gas
the gas
available?
Yes
No
Replace the
Is the safety
safety
thermostat OK?
thermostat
Yes
Yes
Replace the
gas valve
Is there
continuity
between the
PCB control
board and
No
the gas valve?
Set properly
the connection
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.
Yes
Does Turn the clock
the pump in the right
start? position
No
No
Yes
Is the clock in
Replace
the correct
the clock
band time?
Yes
No
Make it free to
Check the
time clock does
his contacts
open and close
when the clock
turns?
Is pump shaft
free to rotate?
Yes
No
Yes
Is there voltage
Replace
available
the pump
to the pump?
No No
Is there
Is there 230V AC
continuity available between
between power 11 and 4
terminals of terminals
PCB control and between
Yes
board and 11 and 10
PCB ignition? terminals of
PCB ignition?
Yes Yes
Is the burner
Check the gap
pressure set to
between the
ionisation probe the maximum?
and hood;
check if the
electrode lead
and fit are not
damaged. Does
Is there a
it now detect the voltage at the
flame? modulator?
No
Replace the
Turn the plug
modulator
Yes
Does
the fan
start?
No
Is smoke
pressure switch
connected right?
Yes
Is smoke
pressure switch
rotate
closed?
No
No
Is limit
thermostat
calling for heat?
Yes
Yes
Is sensor
disconnected?
No
Yes
Is sensor OK?
Yes
Is there 230V AC
available at the
fan terminals?
Yes
Can the burner
pressure be
reduced by the
C.H. ajuster?
No No
No
Replace the
C.H. thermistor
Yes
Is there a spark
Set properly
at the ignition
ignition probe
electrode?
Yes
No Check smoke Is there continuity
pressure switch between
and fan ignition probe
connection
and ground?
Yes No
Is the smoke
Replace the
pressure switch
smoke pressure
contact in open
switch
position?
No
Replace the
Check gap
limit thermostat between the
ignition electrode
and hood, check
if the electrode
lead and fit are
Yes
not damaged.
Connect Does it now
the sensor spark?
No
Replace
sensor
Yes
Replace
the fan
No
Yes
Does the burner
pressure reduce
as the temperature
1) Limit
rises towards max.?
thermostat
Yes
2) C.H.
thermistor
No
3) PCB control
Does the
boiler switch
OFF before
achieving the
temperature?
Yes
Boiler is
satisfactory
Yes
No
No
Yes
Yes
Check:
board
19