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Third Part
(edition-0106)
Control p.c.b. 11.62
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RIVA
FP
SERVICE MANUAL – REV A
5
-6
12
Thermal Control
After 25 second circulator
off and faulty primary cir
cuit (see LED table)
Switch in the function mode
Request for heat from
room thermostat?
Circulator off
Operates motorised valve
Ignition device not fed
YES
Primary circuit flow
switch OK?
YES
NO
Is primary circuit
temperature higher than that
selected?
NO
YES
NO
Operates motorised valve
Supplies the ignition device
Starts the circulator