Installer’s Guide
NOTE:
Outdoor Temperature (ODT) must be between 55°F
and 120°F.
Be sure to set Dip Switches on the Outdoor Control Board for Line
Length and Lift before entering Charge Assist™ Mode. (See Sub-
cool Charging Table Corrections for Line Length and Rise on the
next page or in the Service Facts for the outdoor unit.)
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 re-
main on for one (1) hour. Once charged, the system will exit Charge
Assist™ and control will return to the Comfort Control.
dIrectIon for charGe aSSISt™
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 solenoid output will be
active. This feature works to automatically control refrigerant flow
with BAYCAKT001.
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).
For additional information on manual charging, please see the
Service Facts shipped with the outdoor unit.
charGe aSSISt™ Port
e
r
note:
Charge Assist™ port is
designed for liquid refrigerant charging.
8
18-BC53D2-3
oUtdoor controL Board –
charGe aSSISt™
