| Document type | Service Information Letter |
|---|---|
| Document number | SI0164 |
| Equipment | YK Centrifugal Chiller |
| Brand | YORK |
| File size | 0.1 MB |
Fault codes in this document
CHILLED AND CONDENSER WATER – FLOW SWITCH SHUTDOWNS
| Code / display | Meaning | Cause | Action | Page |
|---|---|---|---|---|
| Leaving Chilled Liquid – Flow Switch Open | Chilled water flow switch shutdown. | The chilled water flow switch has remained open for 5 continuous seconds (2 continuous seconds with software version C.OPT.01.15A.xxx and earlier) while the chiller is running, or failed to close during the Pre-Lube period. | The chiller will automatically restart when the flow switch closes. | 1 |
| Condenser – Flow Switch Open | Condenser flow switch shutdown. | The condenser flow switch has remained open for 30 continuous seconds (2 continuous seconds with software version C.OPT.01.15A.xxx and earlier) while the chiller is running. This check is bypassed for the first 30 seconds of "System Run". | 1 |
CURRENT IMBALANCE MESSAGES
| Code / display | Meaning | Cause | Action | Page |
|---|---|---|---|---|
| Motor or Starter – Output Current Imbalance | Safety shutdown message, used for both Variable Speed Drives and Style B Solid State Starters. Combines the former messages "Motor or Starter – Current Imbalance" and "LCSSS – Output Current Imbalance" into one message. | 1 | ||
| Motor or Starter – Current Imbalance | Former safety shutdown message; combined into "Motor or Starter – Output Current Imbalance" in this software version. | 1 | ||
| LCSSS – Output Current Imbalance | Former safety shutdown message; combined into "Motor or Starter – Output Current Imbalance" in this software version. | 1 |
MOTOR LUBRICATION WARNINGS AND SHUTDOWN
| Code / display | Meaning | Cause | Action | Page |
|---|---|---|---|---|
| Motor-Bearing Lube Suggested | Motor lubrication warning (reminder); sent to the Microgateway as Warning Code 36. | Occurs at the associated elapsed run time since last lubrication when the AUTO LUBE setpoint is DISABLED (chiller not equipped with automatic Motor Lubrication hardware). | When the chiller is equipped with Automatic Motor Lubrication hardware, the AUTO LUBE Setpoint must be ENABLED; with this setting, no lubrication warnings or shutdown will occur. | 3 |
| Motor-Bearing Lube Required | Motor lubrication warning (reminder); sent to the Microgateway as Warning Code 37. | Occurs at the associated elapsed run time since last lubrication when the AUTO LUBE setpoint is DISABLED (chiller not equipped with automatic Motor Lubrication hardware). | When the chiller is equipped with Automatic Motor Lubrication hardware, the AUTO LUBE Setpoint must be ENABLED; with this setting, no lubrication warnings or shutdown will occur. | 3 |
| Motor-Lack of Bearing Lubrication | Motor lubrication safety shutdown; sent to the Microgateway as Warning Code 38. | Occurs at 1400 hours since last lubrication when the AUTO LUBE setpoint is DISABLED and the SHUTDOWN Setpoint enables the safety shutdown. | The SHUTDOWN Setpoint enables or disables this safety shutdown per the customer's preference. If enabled, the safety shutdown will occur at the normal 1400 hours; if disabled, a warning will be displayed but the safety shutdown will not occur. | 3 |
MICROGATEWAY - MOTOR LUBRICATION WARNING CODE CORRECTION
| Code / display | Meaning | Cause | Action | Page |
|---|---|---|---|---|
| Condenser – High Pressure Limit | Microgateway warning code 5. Listed only as the code that previous software versions incorrectly sent to the Microgateway for the Motor Lubrication Warning "Motor-Bearing Lube Suggested"; corrected in this software version. | 3 |
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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.