Led Status Codes - Trane L8X1B060U3XSAA Installer's Manual

LED Status Codes

LED Activity Description
OFF (No LED
No 24 VAC Power to
Activity)
Control
Red, Amber, Power-up verification
Green of LED
Control Fault Detected
Steady ON
Hard Lock-Out
Reversed Line Voltage
Rapid Flash
Polarity
System Lockout
1 Flash
Retries Exceeded
Pressure Sensor Null
Error: Inconsistent
reading with inducer
2 Flashes
OFF, sensor may be
electrically unplugged
Pressure Sensor Span
Error: Inconsistent
reading with inducer
3 Flashes
ON, or inducer fails to
reach target pressure.
High Limit Switch Open
4 Flashes
Flame Present with Gas
5 Flashes
Valve OFF
Auxiliary Limit Open
6 Flashes
Gas Valve Circuit
7 Flashes
Shorted
Steady ON OEM Factory Test Mode
1 Flash Low Flame Sense
18-CE07D1-1C-EN
Lockout Period
Color
— N/A
N/A
—
RED Until fault is removed
RED Until fault is removed
RED 1 Hour Fixed
30 second lockout during
RED
Call For Heat
5 minute lockout during
RED
Call For Heat
Until limit closes or Call For
Heat is removed or 5
minutes during a Call For
RED
Heat or 1 hour lockout
after 3 faults in a single
Call For Heat
5 minutes during Call For
RED
Heat
Until limit closes or Call For
Heat is removed or 5
RED
minutes during Call For
Heat
RED 1 hour lockout
N/A
AMBER
N/A
AMBER
(a)
Comments
Check incoming voltage ~120VAC
Displayed at power up or after any successful control
reset, a one second display of each color in sequence.
Control faults include relay failures, memory failures,
or other hardware failures detected during power-up
self-test or during other continuous operating checks.
Call For Heat Not required. No "W" nor "Y" or "G"
input calls for heating, cooling, or continuous fan
operation will be acknowledged until the fault is
corrected.
Retries are defined as failed ignition attempts, i.e. no
flame sense established during the trial for ignition
period and maintained through the flame stabilization
period.
Recycles are defined as loss of flame following
completion of a successful ignition while in the run
state, and there is no limit to the number of recycles.
If the blower is already on when flame loss occurs,
then it will remain on during the recycle light-off
attempt.
Control waits 5 seconds after call for heat before
displaying fault. Fault is displayed until fault condition
corrects and lockout expires or call for heat is
removed.
Span test maximum duration is 90 seconds. Once the
span test fails, the fault is displayed until the lockout
expires or Call For Heat is removed. Could be blocked
vent, poor air hose connection, or an open circuit in
the inducer harness.
When an open limit is detected during a Call For Heat,
the control energizes the blower on the heating
speed, sets the inducer to maximum, and displays the
fault. Lockout is until the limit closes and either a
minimum of 5 minutes if during a Call For Heat, or
upon removal of the Call For Heat. Three open limit
events in a single Call For Heat results in a 1 hour
lockout. Outside of a Call For Heat, an open high limit
switch is ignored.
When detected, the control energizes the inducer at
the "Run" setting, energize the blower on Heat speed,
and displays fault - No Call For Heat required. The
control will perform a post-purge when the fault
condition is corrected and then it will resume normal
operation after any lockout has expired.
When detected during a Call For Heat, the control
energizes the blower on the heating speed, sets the
inducer to maximum, and displays the fault. Lockout
is until the limit closes and either a minimum of 5
minutes if during a Call For Heat, or upon removal of
the Call For Heat. Outside of a Call For Heat, an open
auxiliary limit switch is ignored.
Voltage sensed at the gas valve terminal with the
safety relay in the de-energized state. The inducer is
set to maximum speed.
Cycle power to the furnace.
Flame Sense Current is weak, less than 3 µAmp
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