Unit Control Board Option Setup; Option Byte Setup; Heat Delay Setup; Unit Control Board - York 20 Series Installation Manual

349215-JIM-B-1008
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FIGURE 28 - 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 Lock-
out, 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.
While in either Setup mode, if no buttons are
NOTE:
pushed for 60 seconds, the display will revert
to its normal display, exiting the Option Setup
Johnson Controls Unitary Products
mode. When saving, the control board only
saves the parameters for the currently dis-
played mode (Option Byte or Heat Delay).

HEAT DELAY 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.
• Press the COMM SETUP / SELECT button to tog-
gle into the Heat Delay Setup, the green LED will
turn off and the red LED for Heat Delay will turn on.
• The 8, 4, 2 and 1 LEDs will then show the status of
the Heat Delay, (See Table 28). Press the UP or
Down button to change the LED status to corre-
spond to the desired Heat Delay Value.
• 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 red
LED will flash a few times and then normal display
will resume.
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