P/N G610B
April, 2016 (Rev 0)
Page 6
particular test, a sequence of audible chirps will sound
which represent a failure code (as well as a quick
flash of the red indicator). If multiple tests fail then you
will hear multiple series of beeps with a pause
between each to identify multiple failure codes.
Diagnostic failure codes identify which of the six tests
failed (see “Diagnostic Failure Codes”). The CPU will
then revert to a slowly flashing red indication if the
test failed. If all 6 tests pass, the unit will enter a
Shutoff Sequence. This provides a way to verify that
the entire system is working properly and the Fuel
Shutoff function can occur in normal operation. See a
further explanation of the Shutoff Sequence in
Section 4.
Note: Pressing the Reset button or the Test button
should not result in solenoid activation with resultant
suppressant dump.
Be sure to always place the pull
pin in the handle when servicing to prevent any
accidental discharge of the system
.
Diagnostic Failure Codes
One chirp
-
Sensor 1/Remote Pull
Two chirps
-
Sensor 2
Three chirps
-
Battery Voltage
Four chirps
-
Solenoid
Five chirps
-
Low Pressure
Six chirps
-
Pull-pin
3. Fire Detect Mode
During fire-detect mode, the main unit monitors the
two sensors to detect high temperature indicating a
fire. If a fire is indicated, the CPU will issue an Alarm
Sequence (See Section 5. “Alarm Sequence”). During
Fire Detect Mode the CPU will continue to silently run
all six diagnostic tests. If at any time one of these
tests fails (with the exception of the low battery test
explained below), the CPU will immediately issue a
Shutoff Sequence to prevent use of the cooking
appliance until the fire suppression system is
serviced. The only exception to this rule is a delay in
issuing the Shutoff Sequence if the diagnostic failure
is a low battery.
Approximately once per minute the battery is
checked. If it is low there will be a short chirp to
indicate that the battery needs to be replaced. The
unit will continue to function normally, with the
warning beep occurring approximately every minute
for about 4 ½ hours. If the battery is not replaced
before the 4 ½ hours has expired, the system will
initiate a Shutoff Sequence. If a reset is initiated in
this situation, the CPU will not resume normal
operation, as it cannot pass the reset or diagnostic
tests.
4.
Shutoff Sequence
A shutoff sequence will cause an audible alarm for 10
seconds, and will disconnect fuel to the cooking
appliance. Following the ten seconds of audible alert,
the unit will issue a chirp about every minute to alert
the owner that the fire suppression system needs to
be serviced.
There are six things which will result in a shutoff
sequence. These are: (1) Low battery indication has
persisted for about 4 ½ hours. (2) A test sequence
was executed successfully. (3) The pull-pin was
removed from its socket during Fire Detect Mode. (4)
An open circuit was detected on one of the sensors
during Fire Detect Mode. (5) An open circuit was
detected on the solenoid during Fire Detect Mode. (6)
If cylinder pressure monitor indicates pressure is low.
5.
Alarm Sequence
An alarm sequence will only occur if a low voltage is
detected at one or both of the sensors. This is an
indication of very high temperatures or of a short
across the sensor circuit. This sequence can only
occur when the CPU is running in Fire Detect Mode.
A short circuit across the sensors at power-up or
during a test sequence will result in a test failure
which prevents the unit from entering Fire Detect
Mode.
The alarm sequence causes an audible alarm,
suppressant to be released and the fuel shutoff to
disconnect fuel to the cooking appliance. This cycle
will continue until the unit is reset or the battery is
depleted.
Permit Number:
20-04649
