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PH3300i SM, Rev. 2017-01-20
5.10.3 Inverter Ignition Power
The inverter supplies power to the ignition/indicator module for the CDI ignition system. During
normal running conditions the stator is providing the energy to the inverter for running the ignition
power. During start up the engine RPM may not be adequate to provide all the necessary energy,
so the inverter relies on the Li-ion ignition batteries and the starting battery for the necessary
energy to run the ignition power. It is still possible to start the generator without the help of the
batteries, but it requires a vigorous pull on the recoil starter to get sufficient engine RPM to get
the power from the stator.
When diagnosing a “no spark” condition, it may be necessary to verify that the inverter is
supplying the necessary power to the ignition/indicator module. The procedure for doing this is
below.
1. Follow the troubleshooting chart in (section 4.4) for diagnosing ignition problems. It is
important to have verified starting and Li-ion battery condition and proper operation of the
ignition switch and the low oil sensor before beginning this test.
2. Follow steps 1-7 in (section 5.1.1) to access the inverter. Lay the inverter down (Fig. 72).
3. Check the continuity from the red/white wire (Fig. 72) to the red/white of the
ignition/indicator module on the control panel.
The resistance should be 0.1-
1.0Ω. If the
resistance is not in this range then repair or replace this wire before continuing.
4. Check the continuity of the black wire from the Li-ion battery tray (section 3.2.2, Fig. 3) to
the 8-pin receptacle on the inverter shown in (Fig. 73). If the resistance is not 0.1-
1.0Ω,
then repair the wiring to restore good ground to the inverter before continuing.
5. With the ignition key ON, put the positive test lead of the volt meter on the red wire (Fig.
72), and the negative lead on the black wire of the 8-pin connector on the receptacle (Fig.
73). Verify that the voltage is 3.2-4.2V. If there is no or low voltage refer to (section 3.2.2)
and (section 4.13) and restore good
(
battery
voltage)
, or replace the voltage regulator as
necessary.
6. With the ignition key ON, put the positive test lead of the volt meter on the red/white wire
(Fig. 72), and the negative lead on the black wire of the 8-pin connector on the receptacle
(Fig. 73). Verify that the voltage is 12.5-14.0V. If there is no or low voltage replace the
inverter.
Fig. 72
Red Wire from
Voltage
Regulator/Li-ion
Batteries
Red/White Wire
to
Ignition/Indicator
Module
Fig. 73
Check Black Ground Wire
from this 8-pin
Receptacle
