Test 12 - Adjust Voltage Regulator - DeWalt DXGN4500 Manual

*Compressor (1 HP)
*Compressor (3/4 HP)
*Compressor (1/2 HP)
Curling Iron
*Dehumidifier
Disc Sander (9")
Edge Trimmer
Electric Blanket
Electric Nail Gun
Electric Range (per element)
Electric Skillet
*Freezer
*Furnace Fan (3/5 HP)
*Garage Door Opener
Hair Dryer
* Allow 3 times the listed watts for starting these devices.
Results
If unit is overloaded, reduce load.
1.
If load is within limits but frequency and voltage still
2.
drop excessively, refer to flow chart.
Overloading a generator in excess of its rated wattage
capacity can result in damage to the generator and to
connected electrical devices. Observe the following to
prevent overloading unit:
•
Add up total wattage of all electrical devices to be
connected at one time. This total should NOT be
greater than the generator's wattage capacity.
•
The rated wattage of lights can be taken from light
bulbs. The rated wattage of tools, appliances and
motors can be found on a data label or decal
affixed to the device.
•
If the appliance, tool or motor does not give
wattage, multiply volts times ampere rating to
determine watts (volts x amps = watts).
•
Some electric motors, such as induction types,
require about three times more watts of power for
starting than for running. This surge of power lasts
only a few seconds when starting such motors.
Make sure to allow for high starting wattage when
selecting electrical devices to connect to the generator:
Figure watts needed to start the largest motor.
1.
Add to that figure the running watts of all other
2.
connected loads.
Test 12 – Adjust Voltage Regulator
NOTE: Always use the unit specific schematics and
wiring diagrams for brush orientation.
Diagnostic Repair Manual
2000 Oil Fired Space Heater (85,000 Btu)
1800 Oil Fired Space Heater (30,000 Btu)
1400 *Paint Sprayer, Airless (1/3 HP)
700 Paint Sprayer, Airless (hand held)
650 Radio
1200 *Refrigerator
500 Slow Cooker
400 *Submersible Pump (1-1/2 HP)
1200 *Submersible Pump (1 HP)
1500 *Submersible Pump (1/2 HP)
1250 *Sump Pump
700 *Table Saw (10")
875 Television
500 to 750 Toaster
1200 Weed Trimmer
Procedure
1.
2.
3.
4.
5.
Figure 1-10. DMM Test Leads Connected to a 240
6.
7.
8.
9.
Results
1.
2.
Section 2 Direct Excitation (Brush Type)
Remove cover from end of alternator assembly.
Remove two screws holding the voltage regulator
(AVR) to the bearing carrier.
Leave AVR connected to stator and brushes.
Set DMM to measure AC voltage.
See Figure 1-10. Connect DMM across a 240VAC
socket.
VAC Receptacle
Ensure all material is clear of the alternator before
proceeding.
Set START-STOP-RUN switch to START.
See Figure 1-11 for location of adjustment screw.
Adjusting screw clockwise will increase voltage,
adjusting counterclockwise will lower voltage.
If there is no change in voltage while adjusting,
refer back to the flow chart.
If voltage is correct, stop testing.
225
150
600
150
50 to 200
700
200
2800
2000
1500
800 to 1050
1750 to 2000
200 to 500
1000 to 1650
500
240
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