C - A 12
TCONT900AC43UA Installer’s Guide
4 Heat/3 Cool/ Heat Pump
Communicating Programmable 3-Wire Hookup
(A/T)CONT900AC43UA Installer Guide
Table 4. Installer Setup Menu Continued.
Note: Y2 counter only with Phase 2 product (serial date
code 0904) if heat demand is satisfied by Y2 - reset timer
HP with EH = 0 (no lockout)
Dual Fuel = 40 degrees default
(Range is 5 - 60)
Note: “0” is not an option with Dual Fuel (must
have a lockout temp configured)
Dual Fuel = 50 degrees default
Must have option 2 selected in
ISU0350.
(Range is 45-65 with 40 degree de-
fault is selected in ISU0350). (A 5 de-
gree deadband is enforced between
comp lockout and aux heat lockout)
Note: Watch for cool air complaints during de-
frost if aux heat lockout is configured. Also be
aware of ISU0361, 362 and 363.
Note: For phase 2 factory
setting = 0 - disabled.
(phase 2 = serial data code 0904)
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