
Lockout Mode. If no faults are detected, the Diagnostic LED will
turn Green and the ignition control will enter Standby Mode.
Standby Mode
While in Standby Mode, the ignition control will continually
monitor the system for faults. Once 24VAC is applied to termi-
nals TH and GND on the control, the ignition control will enter
Start Up Mode.
Start Up Mode
During Start Up Mode, the ignition control will monitor the sys-
tem for faults and begin the ignition sequence. If no faults are
present, the ignition control will begin the ignition sequence by
entering an 18 second waiting period. During this time the Green
LED on the ignition control will switch between Red and Green,
before maintaining a Green color.
After the waiting period, the ignition control will turn on the ig-
niter and gas valve. The igniter will remain on until a flame is
sensed, or up to 10 seconds.
Once a flame has been sensed the ignition control will stop spark-
ing, the gas valve will remain on and ignition control will enter
Run Mode.
If a flame is not sensed, the ignition control will then begin two
additional retrials for ignition. The ignition control will re-enter
the 18 seconds waiting period before the ignition control makes
another attempt at ignition. If the three attempts at ignition fail,
the ignition control will enter Lockout Mode.
Run Mode
While in Run Mode the ignition control leaves the gas valve on,
monitors the flame signal, and leaves the igniter off.
If a flame signal is lost during Run Mode, one additional retrial
for ignition will take place within one second. The ignition con-
trol will restore the spark for approximately 10 seconds. If the ig-
nition re-attempt fails, the ignition control will enter Lockout
Mode.
The ignition control will remain in Run Mode until 24VAC is re-
moved from terminals TH and GND on the control.
Termination of Flame
The flame will go out when power is removed from ignition con-
trol. The ignition control will turn off the gas valve and enter
Standby Mode.
Lockout Mode
When Lockout Mode is entered, the ignition control will remove
power to the gas valve, the igniter will turn off, the Lockout/
Reset Light will turn on, and the Diagnostic LED will display the
appropriate Error Code.
Lockout Manual Reset
Lockout Mode is cleared by pressing an external reset switch for
three seconds. The ignition control will clear all error codes and
enter Standby Mode. During Lockout Manual Reset, the Diag-
nostic LED on the ignition control flashes red and orange, and the
Reset Light remains on until the ignition control is reset. After
the Reset Light turns off, stop pressing the switch. Holding the
reset for three seconds after lockout has been cleared will cause a
fault and result in entering Lockout Mode again.
System Tests
The following system tests are performed during normal opera-
tion. System tests are performed at a minimum of every 24 hours.
Low Voltage Detection
If the voltage between terminals TH and GND on the control is
below 18.75VAC +/- 0.75VAC for more than 3 seconds the igni-
tion control will turn off the gas valve and will not attempt to
spark. The Diagnostic LED will display Error Code 5. The igni-
tion control will not enter Lockout Mode if a low voltage condi-
tion is detected, but will enter Standby Mode and wait for the low
voltage condition to be cleared.
If the voltage between terminals TH and GND on the control ris-
es above 19.75VAC +/- 0.1VAC for at least 3 seconds, the igni-
tion control will then enter Start Up Mode.
Low Voltage Detection test is disabled during Run Mode.
Gas Valve
The ignition control verifies that the gas valve is connected. Fail-
ure of this test results in the ignition control entering Lockout
Mode with the Diagnostic LED displaying Error Code 2.
Flame Probe Tests
The Unexpected Presence of Flame test is performed when no
flame is expected. Failure of this test results in the ignition con-
trol entering Lockout Mode with the Diagnostic LED displaying
Error Code 3.
During the Flame Monitoring test, the flame is checked to ensure
the gas is being burned when the gas valve is on. Failure of this
test will result in the ignition control entering Lockout Mode with
the Diagnostic LED displaying Error Code 3.
Diagnostic LED (DGN LED)/Error Codes
The Diagnostic LED or DGN LED is located by the power con-
nector on the ignition control. Refer to
Figure 44
. The Diagnos-
tic LED will indicate the status of the ignition control. Refer to
Table 12
.
LED Color
Description
Orange-Yellow
Initialization
Green
Standby/Normal Operation
Table 12
continues...
Operating Instructions
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Copyright, Alliance Laundry Systems LLC -
DO NOT COPY or TRANSMIT
76
Part No. 70458101ENR10
Содержание XT170L
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