System information

18-BC53D2-6 21
14.3 Determine the charge adjustment procedure
Final refrigerant charge adjustment is necessary. Choose the appropriate method below.
• Charge Assist
TM
procedure in Section 14.4
• Manual charging procedure in Section 14.5
14.4 Charge Assist
TM
Procedure
NOTE: Outdoor Temperature (ODT) must be
between 55°F and 120°F. See Section 14.1
IMPORTANT: Be sure to set Dip Switches on
the Outdoor Control Board for Line Length and
Lift before entering Charge Assist™ Mode. See
Section 14.2
STEP 1 - To enter Charge Assist™ Mode, press
the MODE button for at least one (1) second.
The on-board LEDs will indicate if the system is
capable of continuing. For a detailed description
of on-board LEDs and their function, see the
Service Facts.
The system will take approximately 12-20
minutes to stabilize before the charge can be
checked by Charge Assist™. Once the system
is stabilized, watch to see which LED turns
on next. If the system charge is correct, the
“CHARGED” LED will turn on and remain on for
one (1) hour. Once charged, the system will exit
Charge Assist™ and control will return to the
Comfort Control.
STEP 2 - If the system charge is low, the “ADD”
LED will turn on and stay on up to one (1) hour
or until enough refrigerant is added to reach the
required system charge level and turn on the
“CHARGED” LED.
When the “ADD” LED is on, the charging sole-
noid output will be active. This feature works to
automatically control refrigerant flow with BAY-
CAKT001.
STEP 3 - If the system charge is high, the “REC”
LED will turn on and the unit will exit Charge
Assist™. You must recover refrigerant from the
system before re-entering Charge Assist™.
For instructions on the Charge Assist™ tool
BAYCAKT001, see the Installer’s Guide
18-HH15D1-* (the position of the * denotes the
latest revision number).
CHARGE ASSIST™ PORT
NOTE: Charge Assist
™
port is
designed for liquid refrigerant charging.
OUTDOOR CONTROL BOARD –
CHARGE ASSIST™