ECKELMANN WRG 3010 E, Инструкция по эксплуатации, Страница: 107 / 113

Firmware V1.4 20.05.2021 107/113
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HT valve fault Hot gas valve fault. The hot gas valve reads both end positions
"open" and "closed". These must match for the actuation. If this is
not the case, the alarm is issued after 300 seconds. (valve
running time)
Check both end position feedback signals of
the hot gas valve.
OPEN: Hot gas goes into the heat
exchanger.
CLOSED: Hot gas bypasses the heat
exchanger.
Heat recovery low temperature LT
20 LT temp return
too high
The return temperature in the low temperature water circuit is
higher than the configured maximum return temperature.
Results in immediate closing of the hot gas valve and reduction of
the calculated power signal for LT. The pump continues to run
until the power signal is lower than the switch-off threshold of the
desuperheat heating instance.
Check the parameterised, maximum return
temperature LT.
LT temp flow too
high
The flow temperature in the low temperature water circuit is
higher than the configured maximum flow temperature.
Results in immediate closing of the hot gas valve and reduction of
the calculated power signal for LT. The pump continues to run
until the power signal is lower than the switch-off threshold of the
desuperheat heating instance.
Check the parameterised, maximum flow
temperature LT.
22
NT FB H2O
outlet Sensor break temperature sensor water outlet (flow) from heat
exchanger LT. Check temperature sensor and replace if
necessary.
LT FB H2O inlet Sensor break temperature sensor water inlet (return) in heat
exchanger LT. Check temperature sensor and replace if
necessary.
LT FB HG outlet Sensor break temperature sensor hot gas outlet from heat
exchanger LT. Check temperature sensor and replace if
necessary.
LT FB HG inlet Sensor break temperature sensor hot gas inlet in heat exchanger
LT. Check temperature sensor and replace if
necessary.
LT no water
The value of the pressure transmitter in the water circuit LT is
lower than the parameter "minimum water pressure".
Results in immediate closing of the hot gas valve and reduction of
the calculated power signal for LT. The pump continues to run
until the power signal is lower than the switch-off threshold of the
desuperheat heating instance.
Refill water.
Check pressure transmitter and
replace if necessary.
If no pressure transmitter is
connected in the HT water circuit,
activate the "pressure transmitter"
button. Then it must show "NO".
LT no heating
power
No heat output is detected at the LT heat exchanger. The water
inlet temperature is higher than the hot gas inlet temperature or
the spread between hot gas inlet and hot gas outlet is less than
the value specified in the parameter "min. spread CO2".
Results in a reduction of the calculated power signal for LT. The
pump continues to run until the power signal is lower than the
switch-off threshold of the desuperheat heating instance. The hot
gas valve closes when the desuperheat heating instance is
switched off.
Check the parameter "min. spread
CO2".
Check / make plausible all
temperatures at the heat exchanger.
Check correct seating and correct
position of the temperature sensor.
LT no flow
No flow in the LT water circuit. The pump is activated, but the flow
monitor does not switch within 1 minute.
Results in immediate closing of the hot gas valve and reduction of
the calculated power signal for LT. The pump continues to run
until the power signal is lower than the switch-off threshold of the
desuperheat heating instance.
Check the flow monitor.
LT pump fault
Collective fault of the pump in the LT water circuit.
Results in immediate closing of the hot gas valve.
Check the collective fault signal of the pump.