17
Status LED’s
Below the ECD display there are 2 columns of LED lights which give the user direct information on the status of the LOX
system. Which LED lights are featured at the ECD display and what their functions are is described in the following table.
LED
Col. Description
Power OK
If this LED is on then the power supply from the UPS Schrack Control to the LOX Control (ECD)
is in order. If this LED is off then the power supply has been interrupted.
N2 production
active
If this LED is on then the nitrogen generator is activated and nitrogen is produced.
Alarm
If this LED is on then one or more alarms have occurred within the LOX system.
O2 level minimum
If this LED is on then the oxygen level has become lower than the minimum allowed
concentration. This is considered to be a dangerous situation which is indicated as an alarm.
Fault
If this LED is on then one or more faults have occurred within the LOX system.
O2 level
maximum
If this LED is on then the oxygen level has become higher than the maximum allowed
concentration. This means that the prevention of fire by oxygen reduction is no longer
guaranteed.
Disabled
If this LED is on then there has been one or more inputs or outputs manually disabled. Once
there are no more inputs or outputs disabled then this LED is off.
Power supply
fault
If this LED is on then the main power supply to the UPS Schrack Control has failed. The main
power, batteries or a fuse of the UPS Schrack Control has failed. The LOX Control (ECD) is still
provided with power through the main power line or backup batteries.
Transmission path
fault
If this LED is on then one or more of the monitored transmission paths within the LOX Control
(ECD) have failed. The line is broken or shorted.
Program fault
If this LED is on then there is a problem within the software of the LOX Control (ECD). The
software has crashed or a bug has occurred.
Nitrogen
generator fault
If this LED is on then there is a fault or defect detected within the nitrogen generator or one of
its peripherals. The fault or defect prevents the production of nitrogen or has reduces the
capacity.
Summary of Contents for LOX
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