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Thu Oct 15 20:00:23 2020, Koji, Summary, General, HEPA AC cord replacement   
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Thu Apr 1 23:55:33 2021, Koji, Summary, General, HEPA AC cord replacement
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Fri Apr 2 15:17:23 2021, gautam, Summary, General, HEPA AC cord replacement
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Tue Apr 6 21:17:04 2021, Koji, Summary, General, PSL HEPA investigation  
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Message ID: 15992
Entry time: Fri Apr 2 15:17:23 2021
In reply to: 15989
Reply to this: 16002
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Author: |
gautam |
Type: |
Summary |
Category: |
General |
Subject: |
HEPA AC cord replacement |
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From the last failure, I had ordered 2 extra capacitors (they are placed on top of the PSL enclosure above where the capacitors would normally be installed). If the new capacitors lasted < 6months, may be symptomatic of some deeper problem though, e.g. the HEPA fans themselves need replacing. We don't really have a good diagnostic of when the failure happened I guess as we don't have any channel recording the state of the fans.
Quote: |
I think the PSL HEPA (both 2 units) are not running. The switches were on. And the variac was changed from 60% to 0%~100% a few times but no success.
I have no troubleshooting power anymore today. The main HEPA switch was turned off.
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