| Document type | Service Information Letter |
|---|---|
| Document number | SI0564 |
| Equipment | YK Centrifugal Chiller |
| Brand | YORK |
| File size | 1.7 MB |
Fault codes in this document
YZ Purge Control
| Code / display | Meaning | Cause | Action | Page |
|---|---|---|---|---|
| Purge Equalization Low Suction Temp Warning | Low Purge Suction Temperature during the equalization period. | Purge Suction Temperature is less than the Purge Suction Temperature Threshold during the entire equalization period. | No longer initiates a Purge System Inhibit. Resets automatically when the Purge Suction Temperature is greater than the Purge Suction Temperature Threshold. | 2 |
Access code entry attempts
| Code / display | Meaning | Cause | Action | Page |
|---|---|---|---|---|
| Access Code not processed - Wait 5 seconds between attempts. | Message displayed when an access code entry is attempted too soon after the previous attempt. | Access code entry attempt made within the 5 second delay between access code entry attempts. | Wait 5 seconds between access code entry attempts. | 8 |
| Access Code not processed - 1 Minute lockout active. | Message displayed when the system prevents additional logon attempts for 1 minute. | An invalid access code was entered consecutively within 5 minutes for the number of times as defined by the maximum logon attempts. | Lockout is active for 1 minute; no additional logon attempts are possible during that time. | 8 |
| Invalid Access Code | The code entered does not match the encrypted structure for the chiller. | An invalid Access Code was entered; displays in the dialog error box if no lockout is in effect. | Constitutes a failed login attempt and is logged in the Access Log. | 8 |
| Expired Access Code | The code entered is valid, but the access code duration has expired. | Access code duration has expired; displays in the dialog error box if no lockout is in effect. | Constitutes a failed login attempt and is logged in the Access Log. | 8 |
| Inactive Access Code | The code entered is valid, but the access time is in the future. | Access time of the code is in the future; displays in the dialog error box if no lockout is in effect. | Constitutes a failed login attempt and is logged in the Access Log. | 8 |
New Warnings
| Code / display | Meaning | Cause | Action | Page |
|---|---|---|---|---|
| WARNING - SALES ORDER - INVALID SERIAL NUMBER | New warning added with this software version; indicates the Unit Serial Number is blank. | The Unit Serial Number is blank. | Resets automatically when the Unit Serial Number is populated. | 13 |
Miscellaneous changes
| Code / display | Meaning | Cause | Action | Page |
|---|---|---|---|---|
| Chilled Liquid Flow Switch Open | Fault. In software version V09 this fault did not trip during the end Prelube for YK. | Corrected in this version so that only the first 44 seconds of Prelube are bypassed. | 13 |
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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.