FAULT FINDING AND DIAGNOSIS
Greenstar Ri Compact 6 720 646 610 (2013/12)
52
7.3
BOILER FUNCTION
Fig. 108
NO
YE
S
BOILER
DE
MAN
D
F
an to
start
speed.
P
u
mp O
N
.
MAI
N
S
PO
WE
R
S
U
PPL
Y
ON
IG
N
ITI
O
N
SE
QU
E
N
CE
(see detail)
BURNER
L
IT?
GREEN
FL
A
M
E
LI
G
H
T
ON
Stop spark
and gas.
Purge
30 seconds
4th
attempt?
LO
C
K
O
U
T
90 second
stabilisation
period.
Fa
n
modulation
to ac
hieve
set
temperature
(3
0-82°
C)
END
O
F
BOI
L
E
R
DE
MAN
D
Gas valve
OFF
P
u
mp run 3
minutes
F
an run 3
0
seconds
Over temperature shut-
down if water tempera-
ture is 6°
C ab
ove set
value.
Gas valve O
F
F
.
F
an overrun
3
0
seconds
3 minute pump
over run
Spark
ignition
and gas
4 seconds
NO
YE
S
IG
N
ITI
O
N
S
E
Q
U
E
N
C
E
6720646610-52.1W
o
BLUE
LIGHT
OFF
BLUE
LIGHT
ON
External
switched
live
demand