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Old 11-27-2018, 02:13 PM   #21
Per Hansson
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Default Re: Mitsubishi Melservo MR-J2S-100A alarm: AL.E9

Hi, the ones I've seen have shown AL.E9 as first & only error AFAIK.
I work as a service technician, so I get called whenever the customers can't get the machines working again...
So far I've repaired quite a few of these and had 100% success so far, and no returns...
Actually I'm near Tampere sometimes for customers too (actually in Lempäälä) but not right now.
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Old 11-27-2018, 07:56 PM   #22
sam_sam_sam
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Default Re: Mitsubishi Melservo MR-J2S-100A alarm: AL.E9

Thank you for this posting I also repair servo drives I have had switching power supply problems from bad capacitor to bad switching regulator IC chips but have not yet seen this problem

Thanks again for sharing this post
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25 Servo Drives 220/460 3 Phase
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These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

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Old 11-27-2018, 09:57 PM   #23
Leopard
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Default Re: Mitsubishi Melservo MR-J2S-100A alarm: AL.E9

Quote:
Originally Posted by Per Hansson View Post
Hi, the ones I've seen have shown AL.E9 as first & only error AFAIK.
I work as a service technician, so I get called whenever the customers can't get the machines working again...
So far I've repaired quite a few of these and had 100% success so far, and no returns...
Actually I'm near Tampere sometimes for customers too (actually in Lempäälä) but not right now.
Thanks for the response. Nice to hear that the failure mode has been consistent.

We've luckily had spare units for the ones that have been acting up, but apparently this model is outdated and hard to get nowadays.

I'll order some optocouplers and will see if these can be brought back to life.
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Old 12-28-2018, 03:02 PM   #24
sam_sam_sam
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Default Re: Mitsubishi Melservo MR-J2S-100A alarm: AL.E9

When I have done these drive before I have given them a recap and change the switching regulator ic chip and now when I do another one of these drive I will change the optic sensor and the surface mount capacitor as well

After reading your post

Last edited by sam_sam_sam; 12-28-2018 at 03:03 PM..
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