Lumina 750
Alarm
Alarm messages
Temperature alarms
Alarm
Cause
Compost temp.
The difference between the
Measured compost temperature
and the
Compost
temperature control value
is more than the entered value.
Air temp.
The difference between the
Measured air temperature
and the
Air temperature
control value
is more than the entered value.
Froststat
The frost thermostat is active.
Frost mixed air
The
Measured mixed air
temperature is lower than the entered
Minimum mixed
air
temperature.
Frost air inlet
The
Measured fresh air
temperature is lower than the entered
Minimum fresh air
temperature.
Temperature sensor failure
Measurements from connected sensors (except the outside sensor) are reliable as long as their measurements
are between -99.9ºC and +99.9ºC. The measurements are unreliable outside these limits. The control computer
will give an alarm. This can mean that the temperature sensor has not been correctly connected or is defective.
The screen displays '#' at the temperature readout.
O2/RH alarms
Alarm
Cause
O2 alarm
The
Measured O2
content is lower than the
Minimum O2
limit minus the set
difference or higher than the
Maximum O2
limit plus the set difference.
Relative Humidity (RH)
alarm
The
Measured RH
is lower than the
Minimum RH
limit minus the set difference or
higher than the
Maximum RH
limit plus the set difference.
Circulation alarms
Alarm
Cause
Fan trouble
The fan is malfunctioning.
Feedback fr. air
There is a mechanical air inlet failure. For example, the servomotor or the fresh
air inlet is faulty. The control computer also gives this alarm if the fresh air inlet
measurement or the measured amount of fresh air is incorrect.
Feedback fan
There is a mechanical RPM feedback failure. For example, a faulty servomotor
or frequency controller. The computer also gives this alarm if the total air flow
measurement is incorrect.
Communication alarms
Alarm
Cause
O2 comm. low
Communication with the O
2
-mulitiplexer (e.g a. MUX.8/.16) which measures the
O
2
content in the low measuring range has been interrupted for a long period of
time.
O2 comm. high
Communication with the O
2
-mulitiplexer (e.g a. MUX.8/.16) which measures the
O
2
content in the high measuring range has been interrupted for a long period of
time.
Comm. I/O-module 1 thru
31
The communication with the IRM- or ISM.12-module has been interrupted for a
length of time.
The Lumina 750 tests a number of functions which are unrelated to climate control but concern the functioning of
the control computer itself. The computer will show the number of error if he detects one. The presented number
will be greater than 100.
30