Trane S8B1A026M2PSAB, Installer'S Manual

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52 18-CE09D1-1E-EN
S8B1
System Status Menu
Run Test Mode
S8B1
= Idle, no demand for cooling, hea!ng, or fan
= Demand for stage gas heat
= Demand for cooling/heatpump
= Demand for con!nuous fan
= Demand for outdoor unit defrost, furnace running in gas heat mode
= Tap selected for airflow
NOTE:
(1) The menu status displayed is solely dependent on the input of 24VAC
that is applied to the low voltage terminal strip.
(2) The status will alternate between the system mode and the airflow
request every 2 seconds.
(3) If an error occurs, an E*.* will alternately flash with the system mode
and airflow request. See first example
Example
Tap #2
Example
1st Stage Pressure
Switch Error
Run Test Mode:
To enter Run Test Mode, scroll to using the Menu key, then push the op!on key. The LED will flash three
!mes, then begin the test.
To exit the test mode, momentarily push the Menu key, cycle power to the furnace, or make a valid thermostat
call for capacity or fan.
Sequence of Run Test Mode
-Turns the inducer on in 1
st
stage for 30 seconds
– Turns on the inducer on 2
nd
stage for 30 seconds (Not applicable on S8B1)
– Turns the ignitor on for 10 seconds
– Turns the circula!ng blower on 1st stage compressor speed for 10 seconds
– Turns the circula!ng blower on 2nd stage compressor speed for 10 seconds
– Turns the circula!ng blower on 1
st
stage gas heat speed for 10 seconds
– Turns on the circula!ng blower on 2
nd
stage gas heat speed for 10 seconds (Not applicable on S8B1)
The above sequence will repeat two more !mes unless the Run Test Mode is exited, see above
Important:
The Run Test Mode does not test fire the furnace or bring the outdoor unit on. It is designed to allow
the technician to observe each mode to ensure the IFC, inducer, and circula!ng blower are performing as
intended.
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