Creep Speed only (No Codes) - Maintenance & Troubleshooting discussion in Forkliftaction's forums

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Creep Speed only (No Codes)

Crown RR/RD 5200S AC

I have an RD5200S AC. Creep/limp speed (<0.5mph) only with no codes. Can anyone tell me what voltage readings I should see at the "U" "V" & "W" motor leads at full travel command. All 3 AC motor leads are pulling 300+ amps at full travel demand. I looked at this though access 1 and also confirmed it with an amp clap direct on each lead.

I have already confirmed all my command inputs (POT1 etc.) are at spec.

I'm leaning toward a failed trac mot but would like a little more info to support my theory.

Thanks!

Posted 22 Dec 2016 01:59
Modified 22 Dec 2016 02:42 by poster
By chevotaman
joined 28 Feb'14 - 112 messages
Texas, United States

It's all just nuts n' bolts.

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Showing items 1 - 5 of 5 results.

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Yep sometimes access 3's don't throw codes

Posted 1 May 2022 00:51
By Ratm
joined 21 Jun'19 - 17 messages
Florida, United States

Stoney

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I've encountered this before, actually! I've noticed that sometimes my RMD or RD (RR Series) will go at a creep-only speed, but as soon as I turn the steering column enough to turn the wheel a small amount, I am given full speed control once again.

I've just shrugged it off as a quirk of my lift, and learned to deal with it.

Posted 5 Mar 2017 00:40
By Raina
joined 5 Mar'17 - 6 messages
Indiana, United States

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Try calibrating the POT. And check the motor encoder input.

Posted 20 Jan 2017 13:18
By Yidneck
joined 20 Jan'17 - 110 messages
New York, United States

Dreamt I was fixing a machine, then came the paperwork and it turned into a nightmare.

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Yes, RD5200S-AC

It was the Traction Mot.

Posted 7 Jan 2017 06:47
By chevotaman
joined 28 Feb'14 - 112 messages
Texas, United States

It's all just nuts n' bolts.

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What height does it think the forks are at? Also are you sure it is a 5200 and not a 5700? If 5700 it could be Access#4 module with the accelerometer.

Posted 27 Dec 2016 01:54
By popeye
joined 24 Nov'14 - 208 messages
Ohio, United States

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