Fault Codes; Fault Codes Retrieval - Trane ACONT900AC43UA Service Manual

Electronic Air Cleaners

Fault Codes

The Air Cleaner LEDs will display a fault indication,
three yellow or three Red LEDs, when a fault has been
detected. A log of the last three faults is recorded and
can be accessed by going into the Set-Uo mode. The
unit will repetitively check the system to determine if
the fault persists. The fault indication will be displayed
as long as the fault condition remains.
If the fault is no longer present, the system will return
to normal operation and no longer display the fault
indication. Even if the fault has been corrected, a log
of the last 3 faults is recorded.
Three Yellow LEDs Flashing
These LEDs flashing on and off means that the Pre-
Filter or the Collection Cells need to be cleaned. The
Air Cleaner control has detected ten consecutive au-
tomatic High Voltage Shut Down (HVSD) cycles. An
automatic HVSD cycle is normally activated by the
control system when an internal electrical arc occurs.

Fault Codes Retrieval

To retrieve the last three faults that the Air Cleaner
Control has detected, enter the Set-Up mode of op-
eration. Press and hold the Power button and the Reset
button for a minimum of five seconds. When the con-
trol enters the Set-Up mode of operation some of the
Green, Yellow and Red LEDs will be on. The color
AC - A 18
and number of LEDs that are on indicates how the
control is presently programmed. (See Set-Up Charts
on previous page). To enter the Fault Codes section
press and hold the Reset Button for ten seconds. Af-
ter ten seconds the main LED display will go out for
one second and then some of the LEDs may begin to
flash on and off. If no fault has been detected then
only the first Green LED will be flashing on and off.
The flashing Green LED or LEDs identifies the fault
number being reported out. One Green Led flashing
on and off means the last fault detected is being re-
ported out, two Green LEDs flashing means the sec-
ond fault detected is being reported out and three
Green LEDs flashing means the last fault stored in
the control memory is being reported out. The last
three faults detected will be stored in the control's
memory and the last fault detected will be the first
fault reported out.
You are now in the Fault Log report section and the
last fault detected is now being reported out. To step
through the faults, press the Power button again to
get the second fault and again pressing the Power
button will take you to the last fault stored in the
control's memory. Push the Power button again and
the control will display the last fault detected. To exit
the Set-Up mode, press and hold both the Power and
Filter Reset buttons for a minimum of 5 seconds.
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.
Fault Codes
When a fault is being reported out check the position
number of any of the Yellow and Red LEDs flashing