Test 6 - Wire Continuity - Generac Power Systems GP Series Diagnostic And Repair Manual

a. Connect one meter lead to red. Connect the
remaining test lead to orange. Approximately
10 ohms should be measured.
b. Connect one meter lead to red. Connect the
remaining test lead to yellow. Approximately 10
ohms should be measured.
c. Connect one meter lead to red. Connect the
remaining test lead to brown. Approximately 10
ohms should be measured.
d. Connect one meter lead to red. Connect the
remaining test lead to black. Approximately 10
ohms should be measured.
e. Connect one meter lead to red. Connect the
remaining test to the stepper motor case.
Infinity should be measured.
Set DMM to measure DC voltage.
8.
See Figure 4-12.
9.
a. Connect the positive meter test lead to wire
15B at terminal block 1 (TB1).
NOTE: Where terminal block is not present, place meter
test lead on the wire at the termination point. If
necessary, use a small paper clip to probe beside the
wire so as not to damage the terminal in the connector.
b. Connect the negative meter test lead to
ground.
c. Set the start-run-stop switch (SW1) to START.
d. If 12 VDC was measured proceed to step 8.
e. If voltage was not measured, proceed to
results.
86 15B 167
0 229 83
TERMINAL
BLOCK
(TB1)
Figure 4-12. Testing Wire 15B
Set DMM to measure resistance.
10.
See Figure 4-13. Disconnect the J2 connector
11.
from the printed circuit board.
a. Connect one meter test lead to pin location J2-
1 (wire 15B).
b. Connect the other meter test lead to wire 15B
at terminal block 1 (TB1).
c. Continuity should be measured.
NOTE: Verify the test probe connector is sharp and is
making contact the with the connector.
Diagnostic Repair Manual
BLK
12.00
BLK
TR2
TR1
004602
Results
If the stepper motor fails any part of step 5, replace
1.
the stepper motor.
If step 7 fails repair or replace wire 15B between
2.
the start stop relay (SSR) and terminal block TB1.
If the stepper motor passes all steps replace the
3.
printed circuit board.
86 15B 167
0 229 83
TB1
J2-1
Figure 4-13. Testing J2-1
Test 6 – Wire Continuity
Procedure
Set DMM to measure resistance.
1.
Remove the six pin connector from the voltage
2.
regulator.
See Figure 4-11. Connect one meter test lead to
3.
wire 0 in the six pin connector removed from the
voltage regulator.
Connect the other test lead to the ground terminal
4.
in the control panel.
a. Continuity should be measured.
See Figure 4-11. Connect one meter test lead to
5.
wire 162 in the six pin connector removed from the
voltage regulator.
Remove wire 162 from the excitation circuit
6.
breaker (CB1).
Connect the other meter test lead to wire 162.
7.
a. Continuity should be measured.
Section 4 AC Diagnostic Tests
00.00
BLK
BLK
TR2
TR1
J2-12
004603
39