Filter
Top Products
292447-YIM-A-0507
Unitary Products Group 55
Figure 34: Unit Control Board
Unit Control Board Option Setup
Option Byte Setup
• Enter the Option Setup mode by pushing the OPTION
SETUP / STORE button, and holding it for at least 2
seconds.
• The green status LED (Option Byte) will be turned on and
the red status LED (Heat Delay) is turned off.
• The 8, 4, 2 and 1 LEDs will then show the status of the 4
labeled options ((8) Fan Off at Heat Start, (4) Low
Ambient Lockout, (2) Free Cooling Lockout, and (1)
Lead / Lag).
• Press the UP or Down button to change the LED status to
correspond to the desired Option Setup.
• To save the current displayed value, push the OPTION
SETUP / STORE button and hold it for at least 2 seconds.
When the value is saved, the green LED will flash a few
times and then normal display will resume.
NOTE: While in either Setup mode, if no buttons are pushed for
60 seconds, the display will revert to its normal display,
exiting the Option Setup mode. When saving, the
control board only saves the parameters for the
currently displayed mode (Option Byte or Heat
Delay).
Check
Alarm
History
Reset All
ASCDs for
One Cycle
Non Alarm
Condition Green
LED Flashing
Current Alarm
Flashed
Red LED