Ariston microSYSTEM 21 RFFI Installation Instructions Manual - Page 39
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1.6
A
CCESS TO THE
Important! Isolate the electrical supply to the boiler before
accessing the control panel.
1.6.1 Checking the fuse
1. Remove the inspection cover on the reverse of the
control panel (F
. 1.54);
IG
2. Remove the fuse mounted on the reverse of the
inspection cover (F
IG
C
S
ONTROL
YSTEM
. 1.55).
F
F
1.6.2 Removing the P.C.B.s
1. Isolate electricity;
2. Remove the screws "O1" (F
3. Separate the facia panel from the rear of the control
panel;
4. Unplug all electrical connections from the P.C.B. and
remove the screws "P1" and remove the P.C.B. (F
1.57).
. 1.54
IG
. 1.55
IG
. 1.56);
IG
O1
O1
P1
P1
P1
P1
IG
O1
O1
O1
O1
F
. 1.56
IG
F
. 1.57
IG
15
.