46
VAPOR-LOGIC
®
VERSION 6 INSTALLATION AND OPERATION MANUAL
OPERATION
Status LED (Vapor-logic control board)
STATUS LED (VAPOR-LOGIC CONTROL BOARD)
The Vapor-logic control board includes a diagnostic Status LED that shows multiple humidifier control conditions . The
Status LED blinks in a 3-stage cycle over approximately four seconds . The Status LED is always “blinking” . It will be
easy to see that the board is powered and operating because, at a minimum, it is running the Status LED .
The blinking will be in a 3-stage cycle starting from being dark with the LED brightness illuminating up to the first stage
of indication .
Timing of the 3-stage cycle will be over approximately four seconds .
See "Vapor-logic control board LED indicators" on page 47 .
FIRST BLINK: FAULTS
A yellow first LED blink indicates there is one (or more) of four conditions present that will prevent the humidifier from
operating . These conditions can be viewed as a message through the Vapor-logic display:
1 . The interlock switch on cabinet or tank is open (connected at ISW input on control board) .
2 . There is no airflow .
3 . The duct humidity high limit has been exceeded .
4 . The Master Enable input is open (P20 input on control board) .
A red Status LED blink indicates there is an active fault preventing the unit from operating . These conditions can be
viewed as alerts through the Vapor-logic display .
If the first Status LED blink is blue, the unit is set to Standby or Test mode . Unit must be set to Auto Mode to enable
operation . The Mode can be set through the touchscreen, or through an associated building automation system (BAS) .
A green Status LED blinks Auto mode with no faults .
SECOND BLINK: COMMUNICATION STATUS
For single-tank installations, green or red indicates communications status to the associated touchscreen display .
If the humidifier is part of a multi-tank system, Green indicates communications is occurring between the controller and
other controllers and/or the touchscreen display . Red indicates there is no communications occurring . If the Status LED
is red, check the communications wiring between the master and other slave units .
THIRD BLINK: HUMIDIFICATION DEMAND
Without humidification demand the humidifier will not run, and the third blink in the Status LED sequence will be blue .
Demand is created through a connected humidistat, humidity transmitter, or through an external source such as building
automation system (BAS) . When there is a call for humidification (demand), the third Status LED blink sequence will be
green .