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(A/T)CONT900AC43UA Installer Guide
4 Heat/3 Cool/ Heat Pump
Communicating Programmable 3-Wire Hookup
toggle between the main screen and a screen show-
ing the Alert code number. When multiple Alert codes
exist simultaneously, the display will cycle through
each code (showing a maximum of the five most re-
cent Alerts) and return to the main screen.
Equipment damage hazard. Minimum
compressor off-time is bypassed during Installer
System Test.
Avoid cycling compressor quickly. Observe compres-
sor protection period.
System checkout
Installer system test
The Installer System Test mode is used to test the
Comfort Control operation with HVAC equipment
(See Table 6, Pages 19-20.) System configuration
determines which tests are available and the num-
ber of stages shown. While in System Test mode,
the minimum off time is bypassed.
The Installer Test is part of the Installer Setup op-
tions. Enter Installer Setup screen and press the
Down arrow key for quick access to the test
selection(s).
• Changing tests will turn equipment off.
• Entering Installer Setup will turn equipment off.
• Charge Assist™ mode not available during
Installer System Tests.
• Test modes times out after five minutes.
Advanced features
Adjustable continuous air flow
The Continuous Fan air flow is user adjustable from
25% to 100% in 5% increments either by entering
the User Setup menu or the Installer Setup menu
(See Table 4, ISU Number 0186, Page 10.)
• Continuous fan mode during cooling operation
may not be appropriate in humid climates. If the
indoor air exceeds 60% relative humidity or sim-
ply feels uncomfortably humid, it is
Table 6. Installer System Tests.
Table 6
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