Nortec MES2 - Manual (Page 27)

Operation | 24
User Interface
LED Status Lights
The MES2 user interface includes 2 LED’s which provide information about the humidifier’s
current status.
Figure 20: User Interface
On/Off Drain Switch
The On/Off Drain switch turns on power to the MES2 control board or to the MES2’s drain valve.
For normal operation the switch should be set to the On position.
To manually drain the humidifier set the switch to the drain position until the cylinder is
completely empty then turn the switch off. Do not leave the switch in the drain position for
extended periods of time.
When servicing the humidifier the switch should be set to Off and the fused disconnect or
breaker should be turned to Off.
Yellow LED Steady On
When the yellow LED is steady on (not flashing) it indicates that the high water sensor
has interrupted filling of the cylinder. The LED is on for information only and unless it
persists for an extended period of time it does not require any action.
On/Off/Drain
Switch
(Turns humidifier
On/Off and drains
the cylinder)
Green LED On
Green LED Blinking
Indicates steam is being
produced
Indicates humidifier is on
but there is no requirement
for humidity.
Yellow LED On
Yellow LED Flashing
Indicates that water level is
high
(LED will flash fixed number
of times then pause.)
Indicates the controller has
detected a fault and has shut down.
Number of flashes indicates
which fault. See
Troubleshooting for more
information.