EUROSTER 11K CONTROLLER USER MANUAL
6
controller/its sensor fails or in case of a power supply black out.
f) Detection of sensor failures and other dangerous situations
Following events are recognized by the controller:
Event
On screen
Pumps
AUX output
Acoustic signal
Sensor open
Deep freeze
OP
on
on
no
Freezing
LO
off
in line with the
control algorithm
no
Critical temperature exceeded
Temperature
on
off
no
Alarm temperature exceeded
Temperature
on
off
yes
Overheating
Hi
on
off
yes
Sensor short-circuited
Strong overheating
SH
on
on
yes
Each of the above events:
cancels ignition function (if activated)
starts to blink controller screen contents.
In case of a single error of the S1/S2 sensor, the
/
light is lit, respectively. In case of
more than one simultaneous errors, only the highest priority error is signaled. Error priorities:
S1 sensor failed (
SH
or
OP
)
S2 sensor failed (
SH
or
OP
)
S1 sensor overheated or frozen (
LO
or
Hi
)
S2 sensor overheated or frozen (
LO
or
Hi
)
S1 sensor temperature too high
S2 sensor temperature too high.
g) Alarm output (optional)
In case of an alarm all pump outputs (including outputs not used in the given system layout)
are activated. It means that each unused pump output may be used as an alarm signal.
The
P3
output is equipped with both normally open (NO) and normally closed (NC) contacts.
In case of an alarm, mains voltage normally connected to the NC contact is switched over to
the NO contact.
h) Acoustic alarm
Should the fireplace water jacket/CH tank temperature exceed the alarm threshold, an
acoustic alarm signal is activated. Press any button to stop the signal for 5 minutes.
i) The ANTY-STOP function
The
ANTY-STOP
function turns the CH system pump(s) on every 14 days for 30 s (to prevent
rotor seizing). "AS" letters are blinking on the controller display while the function is active.
j) DWH priority
In CH systems with DWH tanks the DWH function may be assigned a higher priority than the
CH function. If this is the case, the controller will turn the CH system off should heating of
DHW be needed (to shorten time necessary to heat the DHW tank up). A modified DHW
priority function implemented in E11K controllers prevents room temperature to drop down too
much while the DHW tank is heated: every now and then (preset period) the function is turned
off for 10 minutes so that the CH pump may be turned on for that time.
The DHW function period may be set as the
Pr
installer parameter value. For example if
Pr
=
30, the DWH priority function will be suspended and the CH pump turned on every 30 minutes
(for 10 minutes). The
Pr
= 0 value disables the DWH priority function, which means that the
CH pump will operate regardless of the DHW tank temperature.
