Winco Rotating Field Design Troubleshooting Guide - Manual

NOTE: The following conditions are necessary for all tests that follow. Your life, your safety
and the life of your test equipment depend on paying attention to these details.
1) All resistance checks are with the unit STOPPED!
2) All voltage checks are with the engine running.
3) Always start with the highest voltage scale. (600 Volt scale minimun)
4) Check for residual voltage before any disassembly.
5) Don’t disassemble any more than necessary.
6) Mark leads for reassembly.
7) Disconnect loads before residual voltage checks.
8) Write down all your readings.
9) Record Model #, Serial #, and P/N before calling.
NO OUTPUT (ALL GENERATORS)
(All AC voltage readings are with engine running)
1. Check for Residual output at receptacles WITH THE ENGINE RUNNING. Expect
Minimum of 3 - 5 VAC at the 120V receptacles, double at the 240V recept.
Always start on the HIGHEST ACV Scale. Don’t blow the ohms scale on the first
test!
2. With the engine running, flash the field with 9 VDC dry battery if output is below
5 VAC. Refer to diagram #1
3. Re-Check for output at ALL receptacles.
4. STOP the engine. On WINCO units remove end-cover and disconnect only the
generator output leads G1, G3 and N from the control box leads. Restart engine
and check for output at stator power leads. The DYNA generators cannot be
checked this way , for DYNA units move to step #9.
a.
All units with 120 volt capabilities:
G-1 to N = 120 volts AC
Q-1 to Q-2 =170-300 Volts AC (Capacitor Winding)
b. For units with 240 volt capabilities:
G-1 to N = 120 volts AC
G-3 to N = 120 volts AC
G-1 to G-3 = 240 volts AC
Q-1 to Q-2 = 170-300 Volts AC (Capacitor Winding)
5. If you get proper AC voltage from stator leads the generator end is good.Check
receptacle panel for loose wires, shorted receptacles or defective parts.
6. If you get no output from stator leads:
a.
For RFB - Rotating Field Brush type excitation - move to #17.
b. For RFL - Rotating Field BrushLess Capacitor excitation - move to #7.
RFL - Rotating field with brushless Capacitor type excitation.
7. Check capacitors.
a.
Visually check capacitors for loose or burned wires and leaking caps.
TROUBLESHOOTING
GUIDE
225 South Cordova Ave
Le Center MN 56057
507-357-6831