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FAIL 1st power outage with Onan 45 OEM-15r 9296C and OTOCA 5566643 Spec A


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  #1  
Old 03-13-2017, 06:30:00 PM
gjinc gjinc is offline
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Default FAIL 1st power outage with Onan 45 OEM-15r 9296C and OTOCA 5566643 Spec A

HI,
Last Thursday I had my first power outage with my generator. Everything worked good for 2 hours then fail...
Engine went to 3000rpm, voltage and Hz was very high. No over freq light, no over speed light, no shut down. With all the monitoring in the transfer switch, I thought it would disconnect when out of limits, but it only showed out of limits and showed NOT Available, did not disconnect or shut down the generator.
I figured out pretty quick that the electronic speed control failed. After a couple of hours of troubleshooting I found a c clip on the actuator out of a groove, snapped that back in. I reset it to 1851 rpm's but had about 150 rpm drop when the heat pump would start. So now with a new speed control box I'm waiting for the next outage.

I need to know if the transfer switch, OTOCA 5566643 spec A is suppose to drop the connection or shut down the generator when it is out of limits?
I also thought the engine control 332-2595 F would also shut the generator down for over freq or over speed?

Any suggestions?
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Old 03-13-2017, 06:47:40 PM
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Default Re: FAIL 1st power outage with Onan 45 OEM-15r 9296C and OTOCA 5566643 Spec A

The transfer switch will not shut down the generator until all timers are complete. It will look for the highest source of voltage then switch to that source. Over speed control should have shut the system down.
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Old 03-13-2017, 06:53:44 PM
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Default Re: FAIL 1st power outage with Onan 45 OEM-15r 9296C and OTOCA 5566643 Spec A

Maybe you can answer a question my brother has a heat pump for his home heat and ac what amps would it need to operate I am not sure of btu or anything. thanks
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Old 03-13-2017, 07:08:11 PM
gjinc gjinc is offline
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Default Re: FAIL 1st power outage with Onan 45 OEM-15r 9296C and OTOCA 5566643 Spec A

HI, my heat pump has a "soft start" installed. It stops flickering lights when it turns on and helps generators when connected. Start with looking at what size circuit breaker the heat pump is on.

---------- Post added at 07:08:11 PM ---------- Previous post was at 07:05:43 PM ----------

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Originally Posted by Billy J Shafer View Post
The transfer switch will not shut down the generator until all timers are complete. It will look for the highest source of voltage then switch to that source. Over speed control should have shut the system down.
So all the monitoring is only for connecting the power...darn

I was hoping for a easy answer, how is the engine control suppose to shut the generator down?
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Old 03-13-2017, 07:12:30 PM
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Default Re: FAIL 1st power outage with Onan 45 OEM-15r 9296C and OTOCA 5566643 Spec A

Is this the set that you retrofitted an aftermarket electronic governor to?

If so, did you verify operation of the overspeed function after installing same?

Billy- is overspeed an option on the EM as it is on the JC sets???
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Old 03-13-2017, 07:31:59 PM
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Default Re: FAIL 1st power outage with Onan 45 OEM-15r 9296C and OTOCA 5566643 Spec A

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Originally Posted by Wayne 440 View Post
Is this the set that you retrofitted an aftermarket electronic governor to?

If so, did you verify operation of the overspeed function after installing same?

Billy- is overspeed an option on the EM as it is on the JC sets???
Yes, I bought the speed sensor and actuator, the electronic speed control was on the unit. It tested great so I didn't replace it.
With the new speed control I put on today, I do see a difference, a lot more sensitive.

I never oversped the unit , I never over temp it either.

---------- Post added at 07:31:59 PM ---------- Previous post was at 07:19:32 PM ----------

I will clarify, the controller was giving to me by the guy I got the generator from.
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Old 03-13-2017, 07:34:08 PM
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Default Re: FAIL 1st power outage with Onan 45 OEM-15r 9296C and OTOCA 5566643 Spec A

IIRC, the overspeed switch is in the generator end bell and provides a ground to the control board on overspeed. The switch could be stuck or dirty, wire broken, etc.
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Old 03-13-2017, 07:41:55 PM
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Default Re: FAIL 1st power outage with Onan 45 OEM-15r 9296C and OTOCA 5566643 Spec A

Quote:
Originally Posted by gjinc View Post
HI, my heat pump has a "soft start" installed. It stops flickering lights when it turns on and helps generators when connected. Start with looking at what size circuit breaker the heat pump is on.

---------- Post added at 07:08:11 PM ---------- Previous post was at 07:05:43 PM ----------


So all the monitoring is only for connecting the power...darn

I was hoping for a easy answer, how is the engine control suppose to shut the generator down?
The transfer switch will call for a start on low or loss of power. When power returns it will go into time delay to normal. Then it will transfer to normal power. If it sees a dip in normal power. It will transfer back to emergency. When normal power returns and is good for the time delay. It will transfer back to normal and go into time delay stop. If normal power drops. It will go back through the system again.

The engine control will shut off the system. When it receives a shutdown fault or the normal shutdown command.

---------- Post added at 06:41:55 PM ---------- Previous post was at 06:38:43 PM ----------

Quote:
Originally Posted by gjinc View Post
Yes, I bought the speed sensor and actuator, the electronic speed control was on the unit. It tested great so I didn't replace it.
With the new speed control I put on today, I do see a difference, a lot more sensitive.

I never oversped the unit , I never over temp it either.

---------- Post added at 07:31:59 PM ---------- Previous post was at 07:19:32 PM ----------

I will clarify, the controller was giving to me by the guy I got the generator from.
I have never seen an overspeed as an option on the large units. On the early ones it was the same as the JC units. Later ones had the option of an overspeed board or the JC type.
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Old 03-13-2017, 08:26:12 PM
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Default Re: FAIL 1st power outage with Onan 45 OEM-15r 9296C and OTOCA 5566643 Spec A

I wonder if a stand alone over-speed system could be built or adapted that would kill the engine if the RPM exceeded the set limit. Kind of like a "Murphy" switch or a Tachometer with a rev limiter.
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Old 03-13-2017, 09:02:33 PM
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Default Re: FAIL 1st power outage with Onan 45 OEM-15r 9296C and OTOCA 5566643 Spec A

I think at one time Murphy did build one. May still do.
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