Test 10 - Sensing Leads - Generac Power Systems GP Series Diagnostic And Repair Manual

Section 4 AC Diagnostic Tests
a. Normal excitation winding resistance should be
measured.
Connect the meter test leads across stator leads
10.
66 (pin 9) and stator lead 77 (pin 10) at the C1
connector female side.
a. Normal 10 amp battery charge winding
resistance should be measured.
Connect the meter test leads across stator lead 11
11.
and frame ground.
a. Infinity should be measured.
Connect the meter test leads across stator lead
12.
66A (pin 4) and stator lead 2 (pin 6) at the C1
connector female side and frame ground.
a. Infinity should be measured.
Connect the meter test leads across stator lead 2
13.
(pin 6) at the C1 connector female side and frame
ground.
a. Infinity should be measured.
Connect the meter test leads across stator lead 66
14.
(pin 9) at the C1 connector female side and frame
ground.
a. Infinity should be measured.
Connect the meter test leads across stator leads
15.
wire 11 and stator lead 66A (pin 4) at the C1
connector female side.
a. Infinity should be measured.
Connect the meter test leads across stator leads
16.
wire 11 and stator lead 2 (pin 6) at the C1
connector female side.
a. Infinity should be measured.
Connect the meter test leads across stator leads
17.
wire 11 and stator lead 66 (pin 9) at the C1
connector female side.
a. Infinity should be measured.
Connect the meter test leads across stator lead
18.
66A (pin 4) and stator lead 2 (pin 6) at the C1
connector female side.
a. Infinity should be measured.
Connect the meter test leads across stator lead
19.
66A (pin 4) and stator lead 66 (pin 9) at the C1
connector female side.
a. Infinity should be measured.
Connect the meter test leads across stator lead 2
20.
(pin 6) and stator lead 66 (pin 9) at the C1
connector female side.
a. Infinity should be measured.
Results
If the stator fails any step replace it. For steps 1-10 keep
in mind resistance values may vary depending on
ambient temperature and calibration of the meter used. If
the stator passes all tests refer back to the flow chart.
42
Winding Wire Numbers
Power 11 & 22
Power 44 & 22
Sensing 11S & 44S
Sensing 11S & 22S
Excitation 2 & 6
Battery Charge 66A & 77A
10A Battery Charge 66 & 77
* Resistance values In ohms at 20 °C. (68 °F.). Actual readings
may vary depending on ambient temperature. A tolerance of
plus or minus 5% is allowed.
Test 10 – Sensing Leads
Procedure
Set a DMM to measure resistance.
1.
Disconnect connector C1. See
2.
Component Identification
Figure 4-20. C1 Connector, Male Side
See Figure 4-20.
3.
connector located on the bottom of the control panel.
a. Connect one meter test lead to pin 1 wire 11S.
It may be helpful to connect a small jumper
lead to the individual pin.
b. Connect the other meter test lead to wire 11S
at terminal block 2 (TB2). See
Component Identification
location.
c. Continuity should be measured.
See Figure 4-20.
4.
connector located on the bottom of the control panel.
a. Connect one meter test lead to pin 2 wire 44S.
It may be helpful to connect a small jumper
lead to the individual pin.
b. Connect the other meter test lead to wire 44S
at terminal block 2 (TB2).
c. Continuity should be measured.
12.5 kW 15 kW 17.5 kW
0.125 Ω 0.0852 Ω 0.067 Ω
0.125 Ω 0.088 Ω 0.067 Ω
0.25 Ω 0.176 Ω 0.134 Ω
0.25 Ω 0.176 Ω 0.134 Ω
0.576 Ω 0.824 Ω 0.80 Ω
0.132 Ω 0.107 Ω 0.0939 Ω
0.145 Ω 0.124 Ω 0.117 Ω
Control Panel
for connector location.
004643
Locate the male side of the
Control Panel
for terminal block 2
Locate the male side of the
Diagnostic Repair Manual