Global Power Technologies
SERVICE AND MAINTENANCE
05585 rev11 | Model 8550-SD
Page 31 of 53
Figure 17 – Spark Ignition Components
2.
Remove the orange wire from the pressure switch and isolate it so that it cannot come in contact
with the other electrical connections to prevent high voltage shock.
3.
Carefully remove the spark igniter electrode assembly, loosen the fitting, and slide out the
electrode.
4.
Inspect the spark igniter electrode for cracks in the ceramic tube. Check the rod that runs
through the ceramic tube for continuity. Replace the spark igniter electrode if it is damaged.
5.
To test the function of the SI Control Module, position the spark igniter electrode tip so that
there is a 1/8-inch (3 mm) gap to the TEG cabinet. Then touch the orange wire connector to the
Pressure Switch. Arcing should occur at the gap at the rate of about one per second. If arcing
occurs the system is functioning well.
WARNING!
Do not touch the tip of the orange wire or allow it to come in contact with
other electrical connections.
6.
Check the Pressure Switch. The switch should close at fuel pressures greater than 16 kPa
(2.5 psi). Replace the Pressure Switch if necessary.
7.
Check the battery voltage by measuring the voltage between the brown wire at the Pressure
Switch and the thin white/black wire at Terminal 4 on TB-1. The voltage should be greater than
2.0 Volts.
If the voltage is less than 2.0 Volts, recharge the battery. See procedure below.
If the battery does not hold voltage after a full 16-hour charge cycle, replace the battery
and/or the SI Control Module.