GH10NA USER MANUAL
PAGE
12
Issue I
AUGUST 2017
6.5.
Alarm Conditions
The Controller uses 6 different alarm conditions. In each alarm condition, the Controller displays the alarm
number and activates the alarm sound output. In case of several alarm conditions occurring simultaneously,
their numbers are displayed in sequence. You can exit an alarm condition only by pressing
. This does
not include the AL12 and AL7 alarm condition.
The damage of flue gas temperature sensor (AL7) will not cause enter into a state of alarm, the controller
will work as in optimal flue gas temperature conditions. AL7 alarm signalling occurs only when viewing flue gas
temperature (
⇒
section 6.4). No sound signaling AL7.
Alarm conditions:
•
AL1
→
STB activated or fuse blown
•
AL2
→
Boiler water outlet temperature sensor failure
•
AL4
→
HUW/return temperature sensor failure
•
AL7
→
Flue gas temperature sensor failure
•
AL12
→
Boiler overheating
•
AL13
→
Boiler burnout
6.6.
Power Failure
After a power failure the Controller starts to reactivate according to the condition it was in before the
power down. The Controller waits 1 minute to stabilise the mains power parameters, and then restores
operation with the previously programmed settings.
During the waiting period, the display shows time in seconds remaining until the end of the period, along
with indication of its condition before the power outage:
•
blinking “A” for AUTO mode,
•
blinking “P” for MAINTAIN mode,
•
blinking “r” for MANUAL mode.
Respective indicators (AUTO
or MAINTAIN
) are blinking along with the letters.
6.7.
Boiler Burnout Detection
6.7.1.
No Fuel
If during automatic operation the boiler outlet water temperature remains below the
F08
setting for a
period of time set in the
F09
setting, then the Controller considers the boiler as “burned out” and enters the
AL13
alarm condition.
If during automatic mode for time set in
F9
parameter the flue gas temperature will be below value set in
F11
parameter, the controller recognizes that boiler has expired and
AL13
occurs.
When
F11
=0, this detection including flue gas temperature is disabled.
