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Post by Dave on Aug 27, 2020 15:32:11 GMT -5
Is the red light Supposed to be on when voltage regulator is working?
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Post by Ken on Apr 14, 2021 13:39:30 GMT -5
I have no output power and no red light on the regulator, I applied 12v to the 3rd circuit down on the reg. And still have no output voltage at the inlet side of the breakers. I am assuming the generator is dead
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Post by Ken on Apr 14, 2021 13:57:53 GMT -5
Never mind I have continuity to ground from the output circuit
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Post by wyobuck on Aug 16, 2021 10:06:25 GMT -5
Hey RV Specialist, your posts have been awesome! I have the same problem with my generac. Followed all your tests but got some weird results. Gonna pick up a new DMM, clean up some connections and repeat. Just thought I'd see if you were out there still helping folks in case I don't figure it out.
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Post by wyobuck on Aug 16, 2021 17:14:01 GMT -5
Ok finished all the testing I could find here without success.
1995 Generac Model #09677-3, ser#1392766
History- for a few years sometimes it would not put out electricity until after re-starting 2 to 4x. But then always ran fine and powered everything.
Was running great 2 weeks ago, last week it started right up but shut off after 15 sec, restarted and it shut off again after 30 sec, 3rd time same thing. Each time it ran there was power at the microwave clock. The 4th time it stayed on for 3 minutes and there was power. Started the ac which worked perfectly for about 10 minutes when the generator stalled. I killed the ac switch and re-started the generator, it started right up and ran fine but NO POWER. Turned it off and on, still NO POWER. Gave up after 5 tries. Learned about the reverse drill quick fix, but no help. Checked and re-set all breakers, still no power. Read somewhere the AVR doesn't like getting shut off under load, figuring that was it, I purchased a new AVR, NO HELP.
I went through all the tests posted by RV Specialist. Here's what I got.
Generator is hard wired, 720 hours.
There are two circuit breakers, 30 & 20 amp. Both turned on. There is 1 outlet inside generator compartment. Checked ac voltage there while running and got 2.1 volts, NEW AVR led NOT on.
Next checked circuit breaker under AVR for resistance, tested ok.
Next did the fixed excitation test. AC voltage 55, led came on but went out as soon as jumper was disconnected.
Then re-connected adapter plug, got only 5.2 dc volts while cranking, then went to 1.29v after generator was running.
Next checked adapter wires separately, 1 gave a crazy high 74 ohms, meter set to 200, other wire gave 11 DC volts that dropped to .02v after starting.
1 last test was connecting everything back to proper places, ran jumper wire from pos solenoid terminal, started generator then touched jumper to #3 position plug with adapter for 2 seconds, led came on and I could hear generator putting out power, after disconnecting jumper, led stayed on for 5 seconds or so then went out and generator stopped working, waited a few minutes and tried again with same result. Is the generator side history?
Thanks for any assistance.
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Post by terryum on Aug 22, 2021 18:12:16 GMT -5
Have a Generac Q-55G Model 09592-2 with no output voltage at 50amp leads or at 20/30amp circuit breakers. The red Voltage Regulator led lights at startup but goes out within seconds.
Installed in a National RV Sea Breeze Limited 1996
Trying to diagnose/fix myself. So far have tested AC voltage at 50 amp socket (none). Tested voltage at both 20 and 30 amp circuit breakers (none). Have tried pushing start button for a second while generator is running (supposed to excite it?) - red led comes on as long as push start button but goes out as soon as you stop. Have measured output contacts on VR (11 and 22) when running and 11 is 2.6v . Have measured contact 2 on VR while running and it is 2.4v. but if I push the start switch the red LED goes on and the voltage on 2 increased to 18v but only as long as the start with is pushed.
Generator has only 2" clearance from top to cab floor. Is suspended on a frame so only way to get at the rotor assembly is to drop the whole (heavy) generator, so am hoping it can be diagnosed/fixed without having to do that?
Someone suggested that I try applying 12v to VR contact 4 (DC to Rotor) while generator is running (I think to try to force excite it). Haven't tried that yet.
Any suggestions?
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Post by terryum on Aug 22, 2021 18:50:29 GMT -5
Applying the 12v to (DC to Rotor) wire only increased voltage at breaker from essentially 0 to less than 1v. So forcing the excite wiring didn't get the rotor working. Anything else to try before having to lookout brushes?
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Post by wyobuck on Sept 2, 2021 15:02:45 GMT -5
Have a Generac Q-55G Model 09592-2 with no output voltage at 50amp leads or at 20/30amp circuit breakers. The red Voltage Regulator led lights at startup but goes out within seconds. Installed in a National RV Sea Breeze Limited 1996 Trying to diagnose/fix myself. So far have tested AC voltage at 50 amp socket (none). Tested voltage at both 20 and 30 amp circuit breakers (none). Have tried pushing start button for a second while generator is running (supposed to excite it?) - red led comes on as long as push start button but goes out as soon as you stop. Have measured output contacts on VR (11 and 22) when running and 11 is 2.6v . Have measured contact 2 on VR while running and it is 2.4v. but if I push the start switch the red LED goes on and the voltage on 2 increased to 18v but only as long as the start with is pushed. Generator has only 2" clearance from top to cab floor. Is suspended on a frame so only way to get at the rotor assembly is to drop the whole (heavy) generator, so am hoping it can be diagnosed/fixed without having to do that? Someone suggested that I try applying 12v to VR contact 4 (DC to Rotor) while generator is running (I think to try to force excite it). Haven't tried that yet. Any suggestions? |
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Post by wyobuck on Sept 2, 2021 15:11:31 GMT -5
Terry, not an expert, I'm here like you looking for help. 1 way to check brushes and slip rings is to check ohms between #4 wire (that's the 1 with 2 wires on 1 blade) and #0 which is directly below that on the vr, the ohms should be about 16. Mine was 174, way too high. I pulled the gen, looked at the brushes and they were fine, but my slip rings needed cleaning, I had a black mark and tarnish. Was sure that was the problem. I cleaned the rings, got the ohms down to 19, cleaned all other connections, started it up, same problem, no electricity and the motor runs great.
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