Worcester 30Ri Compact

FAULT FINDING AND DIAGNOSIS
Greenstar Ri Compact 6 720 646 610 (2013/12)52
7.3 BOILER FUNCTION
Fig. 108
NO
YES
BOILER
DEMAND
Fan to
start
speed.
Pump ON.
MAINS
POWER
SUPPLY
ON
IGNITION
SEQUENCE
(see detail)
BURNER
LIT?
GREEN
FLAME
LIGHT
ON
Stop spark
and gas.
Purge
30 seconds
4th
attempt?
LOCKOUT
90 second
stabilisation
period.
Fan
modulation
to achieve
set
temperature
(30-82°C)
END OF
BOILER
DEMAND
Gas valve
OFF
Pump run 3
minutes
Fan run 30
seconds
Over temperature shut-
down if water tempera-
ture is 6°C above set
value.
Gas valve OFF.
Fan overrun
30 seconds
3 minute pump
over run
Spark
ignition and gas
4 seconds
NO
YES
IGNITION SEQUENCE
6720646610-52.1Wo
BLUE
LIGHT
OFF
BLUE
LIGHT
ON
External
switched
live
demand