Fault finding and diagnosis
Greenstar i System
ErP
- 6 720 806 945 (2015/07)
74
8.5
Protection function
Fig. 99 Protection function
6720806945-32.1Wo
Diverter valve
in CH position
(down)
Pump ON
Appliance automatic
frost function
(monitors internal boiler
primary temperature)
Internal appliance
temperature
below 5ºC
Internal appliance
temperature
rises above 12ºC
Internal boiler
temperature
rises above 9ºC
Internal appliance
temperature
between
8ºC & 5ºC
Not above 9ºC
after 30 minutes
Central heating
demand is activated
AUTOMATIC INTERNAL FROST PROTECTION
PUMP OVERRUN FUCTION CH
PUMP ANTISEIZE FUCTION
PUMP OVERRUN LOCKING ERROR
Pump switches off
after a 3 minute
overrun period
Central heating
demand switches
off
End of appliance demand
(central heating)
Diverter valve returns
to DHW position (up)
for DHW priority
Diverter valve returns
to DHW position (up)
for DHW priority
Once locking error is resolved
diverter valve returns to DHW
position (up) for DHW priority
Diverter valve returns
to DHW position (up)
for DHW priority
Optional integral diverter valve kit only
Optional integral diverter valve kit only
Optional integral diverter valve kit only
Optional integral diverter valve kit only
Pump runs for 3 minute
to dissipate heat from
the appliance into the
system
Locking error
Pump runs 10 seconds
every 24hrs from
last time pump ran
Pump runs for 5 minutes
(if internal valve kit is
not fitted)
Diverter valve in CH
position (down). Pump
runs for 5 minutes
No central heating
demand after
a 24hr period
Pump switches off
after a 3 minute
overrun period
