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10.2.2 Check the Pressure Switch
Follow these steps to check the pressure switch:
a)
Remove the two wires from the pressure switch and connect a multi-meter across
the pressure switch terminals, set to measure resistance (ohms). See Figure 28
and 29.
b)
With no fuel pressure in the fuel manifold, check the resistance measured across
the switch is near infinity, which indicates the switch being opened. Replace the
pressure switch if necessary.
Note: Switch should open at pressures below 6.9 kPa (1 psig).
c)
Provide fuel pressure to the switch by opening the manual shutoff valve.
d)
Check the resistance measured across the switch is near zero, which indicates
the switch being closed. Replace the pressure switch if necessary.
Note: Switch should close at pressures above 13.8 kPa (2 psig).
e)
Remove fuel pressure from the switch by closing the manual gas valve.
10.2.3 Check the Battery Voltage
Follow these steps to check the battery voltage:
a)
Open the door of the SI enclosure mounted on the left door of the generator cab-
inet.
b)
Locate the battery wiring harness connector plugged into the power supply, see
Figure 28 and 29.
c)
Probe the back of connector, measuring the voltage between the red and black
terminals of the battery wiring harness connector. The voltage should be greater
than 6 V.
d)
If the voltage is less than 6 V the battery assembly needs recharging or replacing.
10.2.4 Check the Power Supply
Follow these steps to check the power supply voltage to the ignition controller:
a)
Start the TEG, it should have been allowed to cool beforehand .
b)
Upon start up, probe and measure the voltage between the Red and Black wires
of the Ignition controller plug, see Figure 28 and 29. Voltage should be 13.7 V or
greater.
Gentherm Global Power Technologies
5220
28142 Rev. 14
10-6
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