39
16.
ALARMS DESCRIPTIONS
16.1
BOILER MAX. TEMP. EXCEEDING
Protection against boiler overheating is done
in 2 steps. In the first step , after exceeding
Boiler cooling off temperature
,
the controller
tries to reduce boiler temperature by
dropping excess of heat to the HW silo and
by opening mixer servomotors (only when
mixer
service
=
activated
CH
).
If
temperature measured by HW sensor
exceeds value
Max. temp. of HUW
then HW
pump is deactivated, what is done to protect
users against scalding. If boiler temperature
decreases, then the controller returns to
normal operation. If the temperature will still
increase (reaches 95 degrees C) then
constant alarm will be activated of boiler
overheating joined with sound signal.
The alarm can be deleted by pressing
„TOUCH and PLAY” button or activating and
deactivating power to the controller.
Attention: locating temperature
sensor outside water coat of burner
i.e. on exhaust pipe is not
beneficial, because it may cause
delay
in
detecting
boiler
overheating state!
Pic. 27 Alarm of boiler overheating view.
16.2
FEEDER MAX. TEMP. EXCEEDING
This alarm occurs when the contact opens
the feeder sensor. The alarm is reset by
turning the regulator.
The controller can not be used as
sole protection of boiler against
back fire. Additional protecting
automatics is to be used or ensure
a secure boiler/burner design..
16.3
BOILER TEMP. SENSOR FAILURE
Alarm appears by boiler sensor damage and
by exceeding measuring scope of this sensor.
When alarm appears the boiler is activated.
Deleting is done by pressing TOUCH and
PLAY button or by deactivating and activating
the controller. The sensor is to be checked
and replaced if necessary.
Checking the temperature sensor is
described in point 12.9
Pic. 28 Alarm view of „boiler temperature sensor
breakdown”.
16.4
COMMUNICATION LOSS
Controlling panel is connected to remaining
electronics by digital communication joint
RS485. In case of damage of this wire on the
screen
following
information
will
be
displayed: Attention! Lack of communication
The controller does not deactivate regulation
and operates normally with previously
programmed parameters. In case of alarm
situation it will undertake action accordingly
to given alarm.
It is necessary to check the wire connecting
controlling panel with given alarm, then
mend it or replace it if necessary.
