11
Cyclical discharge of heat from the
collector may be only up to the time when DHW
reservoir maximal temperature is reached. Then,
the controller will not let loading heat into the
reservoir, even if critical temperature has been
reached in the collector.
The
reservoir
maximal
temperature
TDHWmax is set in option menu, available
values are max85, max90, max95
Reservoir overheating alarm will be
stopped when the reservoir temperature drops in
relation to preset by 2 degrees.
If the collector temperature (T1 sensor)
exceeds 180°C, the collector pump operation will
be
stopped
and
the
collector
maximal
temperature alarm will be signaled.
8.
ALARMS
The controller alarms by acoustic
signal and display alarm indicator
blinking. The unit recognizes five
alarm situations that may be
identified in the controller screen as described in
the table below.
List of alarms
T1 sensor malfunction, interruption
Alarm
on
incorrect
operation or damage to
T1
sensor. Signals interruption
in T1 sensor circuit. Check if
the sensor is not e.g. off the
unit or the connecting wire
is cut.
Collector pump operation
will be stopped.
During the alarm the collector temperature
indicator for 10÷90°C temperatures is blinking,
while 100°C temperature is lit steadily.
T1 sensor malfunction, short circuit
Alarm
on
incorrect
operation or damage to
T1
sensor. Signals short circuit
in T1 sensor circuit. Check
connections
and
temperature sensor wiring
for short circuit caused e.g.
by mechanical damage of
wire, crushed sensor tube
or melted insulation.
Collector pump operation will be stopped.
During the alarm the collector temperature
indicator for 20÷100°C is blinking, while 10°C
temperature is lit steadily.
T2 sensor malfunction, interruption
Alarm on incorrect operation or damage to
T2
sensor. Signals interruption in T2 sensor circuit.
Check if the sensor is not e.g. off the unit or the
connecting wire is cut.
Collector pump operation will be stopped.
During the alarm the collector temperature
indicator for 35÷75°C is blinking, while 80°C
temperature is lit steadily.
T2 sensor malfunction, short circuit
Alarm on incorrect operation or damage to
T1
sensor. Signals short circuit in T1 sensor circuit.
Check connections and temperature sensor wiring
for short circuit caused e.g. by mechanical
damage of wire, crushed sensor tube or melted
insulation.
Collector pump operation will be stopped.
During the alarm the collector temperature
indicator for 40÷80°C is blinking, while 35°C
temperature is lit steadily.
DHW reservoir overheating
Alarm on hot water reservoir
overheating. It is initiated when
the reservoir temperature reaches
value set in options as
max
. It
means excessive heat in reservoir.
Frequent alarms may indicate too
low heat capacity of the reservoir
for given collector surface.
Collector pump operation will
be stopped.
Alarm will be off and the pump operation
restarted, when the reservoir temperature drops
by two degrees in relation to max preset.
During alarm the reservoir temperature indicator
(entire) is blinking.
Collector critical temperature
Alarm on reaching collector
critical temperature preset.
If the alarm is not connected
with
switching
off
the
collector pump when set TS
sensor
temperature
is
reached, it may indicate too
low pump capacity, pump is
operated at too law speed.
Alarm allows normal operation of the system and
it may be set off in option menu by disabling
AL
.
Collector pump will be started, unless other
alarm is on and the reservoir is not
overheated.
During alarm the collector temperature indicator
shows current temperature in collector and blinks
all.
Collector maximal temperature
Summary of Contents for PCSol 150
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