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PH3300i SM, Rev. 2017-01-20
5.10.2 Inverter Adjustment / Replacement
When setting the overload adjustment pot, the inverter will warm up rapidly due to
the lack of forced airflow. Do not run the unit for more than 5 minutes while
setting the overload adjustment pot. Have all your test equipment ready before
starting this step and conduct this adjustment expeditiously.
Only adjust the two adjustment pots referenced in these procedures. All other
adjustments are set at the factory and
should not be adjusted
under any
circumstances.
1. Complete steps 1-7 in (section 5.1.1) for removing the front panel and inverter
.
2. Connect a volt meter to one of the 120V 20A duplex receptacles (5-20R). Connect a load
bank and power meter (or ammeter if you don’t have a power meter) to the 120V L5-30
receptacle.
3. Start the generator.
4. Adjust the voltage to 122V ±0.3
by turning the voltage adjustment pot screw (Fig. 70)
clockwise to increase and counter-clockwise to decrease.
5. Using a load bank and power meter set the overload adjustment pot (Fig. 71) to trip at
3350W - 3375W. Set it to trip at 27.9A
– 28.1A if you are using an ammeter instead of a
power meter. Turn the adjustment screw clockwise to increase and counter-clockwise to
decrease.
6. Shut the generator off.
7. Seal the screws on both adjustment pots using a drop of touch up paint or silicone sealant.
8. Reassemble the generator using steps 1-7 in (section 5.1.1) in reverse order.
Overload Adjustment Pot
Voltage Adjustment Pot
Fig. 69
Fig. 70
Fig. 71
