13
Malfunction or failure
Greenstar Utility
ErP
– 6 720 821 750 (2018/04)
6.2
Controls behind the front panel
Temperature control [A]
▶ Remove the front panel and check the thermostat control
knob [A] is turned on.
– To remove the front panel pull the panel squarely away
from the front of the boiler.
– To replace, realign ball studs and push back into place.
Reset buttons [B, C & D]
▶ Remove the front panel and locate the reset button.
– To remove the front panel pull the panel squarely away
from the front of the boiler.
– To replace, realign ball studs and push back into place.
Always keep pressure to the edges of the panels to avoid
accidental damage.
Fig. 6
Controls behind the front panel
[A]
Temperature control
[B] Reset button - Flue overheat thermostat
[C] Reset button - Appliance overheat thermostat
[D] Reset button - Burner lockout
Appliance reset buttons
Automatic reset
▶ An excessive appliance operating temperature can activate
a thermostat to switch off the appliance. This thermostat
automatically resets when the appliance has cooled down
sufficiently.
Do not attempt to repeatedly start the appliance using the
manual reset buttons as persistent failure indicates a fault
requiring the attention of a service engineer.
Flue overheat [B] (manual reset)
▶ Excessive combustion gas temperatures can activate a
thermostat to switch off the appliance, indicated by button
standing proud. Press and release to reset thermostat.
Appliance overheat [C] (manual reset)
▶ Should the appliance temperature rise beyond the
automatic reset level, a high limit thermostat will switch the
appliance off, indicated by button standing proud. When
the appliance has cooled down, press and release to reset
the thermostat.
Burner lockout [D] (manual reset)
▶ Flame failure, for any reason, will cause the burner to go
safely to a lockout condition.
▶ Remove the appliance front panel and check the lockout
button. If this is illuminated it indicates a "lockout"
condition. To cancel lockout, wait 2 minutes, then press
and release the button.
6.3
Persistent failure
If the appliance fails to operate after following the previous
checks from the “Malfunction or failure” chapter 6, then a
safety device in the appliance control system may have been
activated to prevent the appliance from operating.
6720
821
750
-01
.1W
o
