Nortec NH-EL Series - Manual (Page 52)

49 | Maintenance and Servicing
Red - Fault
Indicates the controller has detected a
fault condition and stopped humidifier.
Check display for fault information.
Yellow - Service
Indicates that service may be required
or that the water level is high. Check
display for warning information.
Green ON LED On
ON LED Blinking
Indicates steam is being produced.
Indicates no demand or safety loop
open.
Status LED
The NH-EL has a single LED that
changes color to indicate Status
LED Status Lights
The keypad and display panel includes a single tri-color LED which provides information about
the humidifier status.
Figure 40: LED Status Lights
Common Warnings
The following two warnings are common during normal operation and do not normally indicate
that service is required. For a new cylinder the Level Sensor On warning indicates that full
capacity cannot be reached because cylinder water is not concentrated. For an old cylinder the
Level Sensor On warning may be an indication that the cylinder will soon have to be replaced.
Warning – Max Level
The above warning is normal during the start and end of a cylinder life. It indicates that
the high water sensor has interrupted filling of the cylinder. It is displayed for information
only and unless it persists for an extended period of time it does not require any action.
Security Loop
The above warning is normal during operation. It indicates that one of the security loop
devices connected between control terminal 1 and 2 is open. It is displayed for
information only and does not require any action.