Make Up Air II Installation Manual

05/21/2019 22 EI914
Operational Indicators
LED Monitor Lights
Green LED – is a representation of low voltage control power.
 Green LED ON = good 24VAC power and fuse is in good working condition.
 Green LED OFF = Fuse open or no 24VAC from transformer (or primary source breaker
open).
Red LEDs – there are 4 red LEDs on the control, each LED represents a stage of electric heating
elements.
STATUS LED
Status LED (front yellow LED) – is software driven LED which alerts the user that a message is
available in the message center.
 Status LED OFF = No message is available
 Status LED Blinking = Message is available
o To access available messages, the user must press and hold the “SELECT”
button for 3 seconds.
Possible messages:
 Faulty sensor (OT and/or ST)
 Manual hi-limit
 Software hi-limit
 Automatic hi-limit
See Troubleshooting section for more information on viewing available messages.