Test 19 - Check Battery Charge Rectifier (Bcr2); Test 20 - Check 10 Amp Circuit Breaker - Generac Power Systems GP Series Diagnostic And Repair Manual

Section 4 AC Diagnostic Tests
Start the generator.
3.
a. The amp reading on the meter should be
approximately 0.2 Amps.
b. Apply full load to the generator.
c. The amp reading should increase.
d. Normal ranges at full load can be 3-7 amps,
but can get as high as 10 amps depending on
the state of charge of the battery.
Results
If amperage was measured between 0.2 to 10
1.
Amps in step 2 and step 3, the charging system is
working.
If no amperage was measured, check the meter fuses
2.
and verify the functioning of the meter. If meter is
good and no current is measured refer to flow chart.
Test 19 – Check Battery Charge
Rectifier (BCR2)
Procedure
Disconnect all wires from battery charge rectifier 2
1.
(BCR2).
Set the DMM to the Diode Test range.
2.
Connect the negative (-) test lead to the center
3.
terminal of BCR2.
Connect the positive (+) test lead to an outer
4.
terminal.
a. The meter should measure approximately 0.5
volts.
Connect the positive test lead to the other outer
5.
terminal.
a. The meter should measure approximately 0.5
volts.
Connect the positive (+) test lead to the center
6.
terminal of BCR2.
Connect the negative (-) test lead to an outer
7.
terminal.
a. The meter should measure Infinity.
Connect the negative test lead to the other outer
8.
terminal.
a. The meter should measure Infinity.
Figure 4-26. Battery Charge Rectifier
46
Short to Ground
Set the DMM to measure resistance.
9.
Connect the positive (+) test lead to the case
10.
housing of BCR2.
Connect the negative (-) test lead to an outer
11.
terminal.
a. The meter should measure Infinity.
Connect the negative test lead to the BCR center
12.
terminal.
a. The meter should measure Infinity.
Connect the negative test lead to the remaining
13.
outer BCR terminal.
a. The meter should measure Infinity.
Results
If any of the previous steps failed, replace BCR2.
1.
If BCR2 tests good, refer back to the flow chart.
2.
Test 20 – Check 10 Amp Circuit
Breaker
Procedure
Set DMM to measure resistance.
1.
Locate the 10 Amp circuit breaker (CB1) in the
2.
control panel. See
Identification
See Figure
3.
13A from the circuit breaker.
Connect one meter test lead to one terminal of the
4.
circuit breaker.
Connect the other meter test lead to the remaining
5.
terminal on the circuit breaker.
a. Continuity should be measured.
15A
Figure 4-27. Testing 10 Amp Breaker
004651
Control Panel Component
for circuit breaker location.
4-27. Disconnect wire 15A and wire
13A
10A CIRCUIT BREAKER (CB1)
Diagnostic Repair Manual
004616