Guardian Technologies 4390, 4456, 4389, 4760, 4759, 4758 manual Test 64 Check Battery Charge Output

SECTION 4.4

DIAGNOSTIC TESTS

PART 4

DC CONTROL

meter to the output lugs of the generator main line circuit breaker.

The fuel regulator is fitted with one (7 kW), or two (12 & 15 kW) adjustment screws. While watching the frequency meter, slowly turn the adjustment screw(s) clockwise or counterclockwise one at a time until highest frequency is read on the meter.

Note: Only limited adjustment is available between the set pins on 7 kW fuel regulators. Under no circumstance should any of the pins be removed (see Figures 30 & 31).

6.When the highest frequency is reached, maximum power has been set. From this point turn the adjustment screw(s) 1/4 turn counterclockwise. The regulator is now set.

Figure 30

Figure 31

Page 4.4-18

7.Turn utility power to the main distribution panel back on. This can be done by switching the service main breaker to the “ON” or closed position. Allow the generator to shut down.

Do not make any unnecessary adjustments. Factory settings are correct for most applications. However, when making adjustments, be careful to avoid overspeeding the engine.

TEST 64 - CHECK BATTERY CHARGE

OUTPUT

DISCUSSION:

The battery charging system is a two amp trickle charge. It is capable of maintaining a charge on a functional battery. It is not intended to, nor capable of charging a completely dead battery.

The system will charge when utility source power is available to the generator or if the generator is running. The system consists of a transformer (TX), battery charge relay (BCR), battery charger (BC), and a battery charge winding. The BCR contacts allow AC voltage to the battery charger. When the BCR is de- energized, voltage from the TX is available to the battery charger. When the generator starts, Wire 14 energizes the BCR. This allows battery charge winding AC output to power the battery charger.

PROCEDURE:

1.Check the 5 amp fuse (F2).

2.Set the AUTO-OFF-MANUAL switch to OFF.

Note: Utility source voltage MUST be available to the generator.

3.Set a VOM to measure DC amps.

4.Disconnect Wire 13A (purple) from the 5 amp fuse (F2).

5.Connect the positive (+) test lead to Wire 13A, and connect the negative (-) test lead to the fuse (F2) terminal from which Wire 13A was removed. The VOM should measure 50 milliamps to 2.5 amps, depending upon the state of the charge of the battery.

6.Repeat Step 5. This time set the AUTO-OFF-MANUAL switch to MANUAL. Allow the generator to start and then measure the current again as in Step 5.

RESULTS:

Follow the Flow Chart on Page 4.3-5.