| Document type | Service Information Letter |
|---|---|
| Document number | SI0252 |
| Equipment | YK Centrifugal Chiller |
| Brand | YORK |
| File size | 0.4 MB |
Fault codes in this document
6 of these messages are explained on a page of their own — cause, what to check, reset — written from this manual:
VGD Screens
| Code / display | Meaning | Cause | Action | Page |
|---|---|---|---|---|
| Surge Avoidance Surge Detected | LED on the VGD screen (replaces the former "Surge Detected" LED). Illuminates when full speed surges are detected. | Full speed surges detected. | 1 | |
| ACC Surge Detected | LED added to the VGD screen; present when the Motor Drive Type setpoint is set to VSD and the Motor Communications Protocol setpoint is set to MODBUS. Illuminates when running at less than full speed. | Running at less than full speed. | 1 |
OIL SYSTEM
| Code / display | Meaning | Cause | Action | Page |
|---|---|---|---|---|
| Oil – Low Temperature Differential | Start inhibit. In this software version the condition is checked only when the chiller is stopped; previously it was checked while the chiller was stopped and during the first 10 seconds of Pre-lube. It is no longer checked during Pre-lube. | 2 | ||
| Warning - Standby Lube – Low Oil Pressure | Warning. In addition to the existing required conditions, it is now set when either the Pump Oil Pressure or the Sump Oil Pressure is less than 2 PSIG. | Pump Oil Pressure or Sump Oil Pressure less than 2 PSIG (with the existing required conditions also met). | Manual reset warning — cleared using the WARNING RESET key; the acknowledgement is entered in the Security Log. | 2 |
FAULTS
| Code / display | Meaning | Cause | Action | Page |
|---|---|---|---|---|
| VSD – High Phase (X) Instantaneous Fault | VSD Cycling fault. | If this Cycling fault occurs 3 times in 10 minutes, the third shutdown becomes a Safety fault. | 2 |
Warnings
| Code / display | Meaning | Cause | Action | Page |
|---|---|---|---|---|
| Warning – Harmonic Filter – Not Running | New warning added in this software version. | Set when ALL of the following are true for 20 continuous seconds: chiller is running; filter is enabled; filter present status is true; run time greater than 20 seconds; filter operating mode is "stopped". | The warning is released when the chiller is stopped, but will be displayed until manually cleared using the WARNING RESET key when logged in at Operator (or higher) Access Level. | 2 |
PUMP CONTROL
| Code / display | Meaning | Cause | Action | Page |
|---|---|---|---|---|
| Leaving Chilled Liquid – Flow Switch Open | Cycling shutdown. With this software version, the Chilled Water Pump contacts (TB2-44/45) remain closed while the chiller is shutdown on this cycling shutdown. | While the chiller is shutdown on this cycling shutdown, the Chilled Water Pump contacts (TB2-44/45) remain closed until the chiller is given a stop command or has another fault. | 3 | |
| Condenser – Flow Switch Open | Cycling shutdown. With this software version, the Condenser Pump contacts (TB2-150/151) remain closed while the chiller is shutdown on this cycling shutdown. | While the chiller is shutdown on this cycling shutdown, the Condenser Pump contacts (TB2-150/151) remain closed until the chiller is given a stop command or has another fault. | 3 |
SECURITY LOG – MANUAL RESET WARNINGS
| Code / display | Meaning | Cause | Action | Page |
|---|---|---|---|---|
| Condenser or Evaporator Transducer Warning | Manual reset warning. When acknowledged (by pressing the WARNING RESET button), the actual warning message being reset is now entered in the Security Log; previous versions logged a generic "Warning Reset" message. | Reset using the WARNING RESET key. | 4 | |
| Standby Lube Low Oil Pressure Warning | Manual reset warning. When acknowledged (by pressing the WARNING RESET button), the actual warning message being reset is now entered in the Security Log; previous versions logged a generic "Warning Reset" message. | Pump Oil Pressure or Sump Oil Pressure less than 2 PSIG (in addition to the existing required conditions). | Reset using the WARNING RESET key. | 4 |
| Excess Surge Detected Warning | Manual reset warning. When acknowledged (by pressing the WARNING RESET button), the actual warning message being reset is now entered in the Security Log; previous versions logged a generic "Warning Reset" message. | Reset using the WARNING RESET key. | 4 | |
| Condenser or VGD Sensor Failure warning | Manual reset warning. When acknowledged (by pressing the WARNING RESET button), the actual warning message being reset is now entered in the Security Log; previous versions logged a generic "Warning Reset" message. | Reset using the WARNING RESET key. | 4 | |
| Conditions Override VGD Warning Reset | Manual reset warning. When acknowledged (by pressing the WARNING RESET button), the actual warning message being reset is now entered in the Security Log; previous versions logged a generic "Warning Reset" message. | Reset using the WARNING RESET key. | 4 | |
| Purge High Pressure Warning | Manual reset warning. When acknowledged (by pressing the WARNING RESET button), the actual warning message being reset is now entered in the Security Log; previous versions logged a generic "Warning Reset" message. | Reset using the WARNING RESET key. | 4 | |
| Purge Float Switch Error Warning | Manual reset warning. When acknowledged (by pressing the WARNING RESET button), the actual warning message being reset is now entered in the Security Log; previous versions logged a generic "Warning Reset" message. | Reset using the WARNING RESET key. | 4 | |
| Excess Purge Warning | Manual reset warning. When acknowledged (by pressing the WARNING RESET button), the actual warning message being reset is now entered in the Security Log; previous versions logged a generic "Warning Reset" message. | Reset using the WARNING RESET key. | 4 | |
| Purge canister #X Full Warning | Manual reset warning. When acknowledged (by pressing the WARNING RESET button), the actual warning message being reset is now entered in the Security Log; previous versions logged a generic "Warning Reset" message. | Reset using the WARNING RESET key. | 4 | |
| Setpoint Override Warning | Manual reset warning. When acknowledged (by pressing the WARNING RESET button), the actual warning message being reset is now entered in the Security Log; previous versions logged a generic "Warning Reset" message. | Reset using the WARNING RESET key. | 4 | |
| Filter Not Running Warning | Manual reset warning. When acknowledged (by pressing the WARNING RESET button), the actual warning message being reset is now entered in the Security Log; previous versions logged a generic "Warning Reset" message. | Set when all of the following are true for 20 continuous seconds: chiller is running; filter is enabled; filter present status is true; run time greater than 20 seconds; filter operating mode is "stopped". | Released when the chiller is stopped; displayed until manually cleared using the WARNING RESET key when logged in at Operator (or higher) Access Level. | 4 |
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 YK 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.