| Document type | Service Information Letter |
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| Document number | SI0554 |
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| Equipment | YMC2 Magnetic Bearing Centrifugal Chiller |
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| Brand | YORK |
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| File size | 0.2 MB |
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Fault codes in this document
1 of these messages are explained on a page of their own — cause, what to check, reset — written from this manual:
York Chiller Access Manager
| Code / display | Meaning | Cause | Action | Page |
|---|
| You do not have the correct access level to make the change. | Access-level denial message shown when an attempted change is rejected. | Displayed in error when pressing the Maintenance Acknowledge button in Enhanced access with the correct password entered, so the warning could not be cleared. | Corrected in this software release. | 2 |
| Your Access Level Doesn’t Allow This. | Message shown when the current access level does not permit the attempted action. | Displayed in error when pressing the Page Down button on the Access Log screen in Enhanced access, so the next page would not display. | Corrected in this software release. | 2 |
VSD/MBC Initialization
| Code / display | Meaning | Cause | Action | Page |
|---|
| VSD – Initialization In Progress Start Inhibit | Start inhibit displayed while VSD initialization is in progress. | Appeared after bootup and could not be cleared when updating software (earlier software versions). | This has been corrected in this software release. | 3 |
| MBC – Initialization in Progress Start Inhibit | Start inhibit displayed while MBC initialization is in progress. | Appeared after bootup and could not be cleared when updating software (earlier software versions); either this inhibit or the VSD one could appear. | This has been corrected in this software release. | 3 |
MBC
| Code / display | Meaning | Cause | Action | Page |
|---|
| MBC – POWER FAIL LANDING | Fault set on the MBC. | | Cleared using the Clear Fault button. Earlier software did not always display the Clear Fault button when this fault was set; this has been corrected in this software release. | 3 |
Every row above cites the page of this document it came from, and each one is re-read against that page by an automatic check before publication. The short table of all YORK YMC2 messages: fault codes.
Manufacturer document, published here as reference material for equipment we supply. The original lives at docs.johnsoncontrols.com. The rights holder may ask us to take it down — we will.
