Gentherm P-5050, Руководство по эксплуатации, Страница: 21 / 98

Gentherm Global Power Technologies 4-3
P-5050 62553 Rev.8
4.1.2 Spark Ignition Control System
The Ignition Control System consists of the following parts:
• Spark electrode
• Pressure switch
• Ignition control module (SI)
• Solenoid valve
• SI Controller Board
• Battery pack
When the manual ball valve is opened, fuel pressure causes the pressure switch (located
in the fuel system) to close. The pressure switch is connected to the SI Controller’s ignition
request input. If the optional TEG Controller board is installed, the pressure switch is con-
nected to it instead of directly to the SI Controller board. The TEG Controller board sends
the ignition request to the SI Controller board when the TEG is to be started. This causes
the SI Controller board to power the SI module, indicated by the SI power indicator being
on. When the SI module is powered and in combination with the absence of flame sensed
at the spark electrode, the ignition control module (SI) generates sparks from the electrode
to the combustion chamber plate, as well as opens the solenoid valve allowing gas to flow
into the burner chamber, causing ignition to occur. Once combustion is detected, the SI will
stop sparking and the SI will continue to monitor the presence of flame at the electrode. If
the SI did not detect combustion for a period of 7 seconds, it will stop sparking and close the
solenoid valve, wait for a 10 second purge period and then make another attempt at ignition.
The SI will attempt 3 ignition trials and if flame detection cannot be maintained, the SI will go
into Lockout mode. The Lockout light on the SI Controller board will turn on and the SI will be
powered down. The SI Controller board will have to be reset for another attempt at ignition,
see Section 4.1.2.1, Resetting the SI Controller board. The SI Controller board consumes
more power when it is locked out than when it is waiting to start.
Note: The certified Ignition Control Module (SI) is responsible for the ignition sequence and
control of the fuel valve and spark generation.
Note: The combustion control system contains a single 6V, 5.0 amp-hour monobloc recharge-
able battery and a constant potential battery charger. A new fully charged battery pro-
vides approximately 120 minutes of operating time at 25ºC. The SI Controller switches
from battery voltage to generator power unit voltage after the output voltage exceeds
10 VDC. Completely discharged batteries will take approximately 20 hours TEG opera-
tion to regain 100% charge as long as the output load is not overloading the TEG.
4.1.2.1 Resetting the SI Controller Board
To reset the SI controller board, wait 10 seconds after the red light turns on, then press the
on-board reset switch. If the pressure switch is still closed, the SI controller board will ener-
gize the SI and the SI will begin another three start trials.
If the optional TEG Controller board is installed:
Press the Reset (S3) or send a SCADA Reset signal to the TEG Controller board
See Figure 7.