18
9.1.2
Controller Status: colors led and meaning
C02-UNIT-BL can assume four different status, which are represented by the colors assumed by the Status
Indicator and by the TOP LED (see Figure 18):
The GREEN color indicates that the Setpoint value has been reached (within the
tolerance defined in the alarm subpage, see paragraph 9.2.2.5) and that the system is working
properly.
Controller Status: NORMAL
The YELLOW color indicates that the controller is in transient regime. The Yellow light
will appear after the controller is turned on and after any Setpoint change. The system is working
properly, it is not in alarm and no action is needed. As soon as CO2-UNIT-BL reaches the CO
2
composition, CO2-UNIT-BL Status changes to NORMAL and the color turns GREEN. If CO2-UNIT-
BL cannot reach the set composition values within the maximum time defined by the operator
(see paragraph 9.2.2.5), the Gas Controller Status changes to ALARM and the color turns
ORANGE.
Controller Status: TRANSIENT
The ORANGE color indicates that the current gas concentration is not correct and its
value is out of the set tolerance (see section
ALARMS
in paragraph 9.2.2.5). Most commonly this
is related to gas leaks or gas source(s) running low. Verify that all cables are correctly connected.
Check all tubing for gas leaks and pressure in gas supply tanks.
Controller Status: ALARM
The RED color indicates that there is a problem with the unit itself (for example the
sensor is broken). The system is on alarm. Turn the system off, wait for 5 minutes, and turn it
back on. If the color is still red, contact Okolab at www.oko-lab.com for support.
Controller Status: ALARM
Tip
►
The TOP LED follows the same color code as the Status Indicator (see Figure 18). To enable/disable
the TOP LED follow the instruction reported in paragraph 9.2.2.3.
Figure 18. Status Indicator and TOP LED.
