Trane ACONT900AC43UA Service Manual page 253

on and off. Compare this combination of flashing LEDs position numbers to the Fault Code chart to see which
fault has been detected. The number one Yellow LED will always be out in the Fault Code report section.
Dual Air Cleaner Faults and Filter Reset:
When dual air cleaners are installed as part of a communicating system, each whole house air cleaner will
retain its own faults. However, in a communicating system with dual air cleaners, the 900 series comfort
control will only recognize the filter timers for one air cleaner. Both the Pre-Filter and Collection Cell timers for
one air cleaner can be reset at the comfort control.
Hazardous Voltage. High Voltage is present within the Air Cleaner for operation. Before removing the Power
Door, turn the power off and wait at least 15 seconds to allow voltage to discharge. Failure to disconnect
power before servicing could result in death or serious injury.
Risk of Electric Shock. These servicing instructions are for use by qualified personnel only. To reduce the
risk of electric shock, do not perform any servicing other than that contained in the Service Facts unless you
are qualified to do so. Failure to follow all electrical safety precautions could result in death or serious injury.
Note: If more that one whole house air cleaner is installed, each unit will retain its own fault codes.
Examples: See Figure 8
Ex. #1: The most recent fault condition was a High Voltage "HV was Low"
Ex. #2: The second fault condition was "Internal Control Lockout"
Ex. #3: The third fault condition was "Input Current too High"3
WARNING
WARNING
Electronic Air Cleaners
AC - A 19