SI0252 — YK Centrifugal Chiller - Software Enhancements (V23), Control Panel

Document type	Service Information Letter
Document number	SI0252
Equipment	YK Centrifugal Chiller
Brand	YORK
File size	0.4 MB

Fault codes in this document

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.

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.