York YK Service Manual

YORK INTERNATIONAL
2
TABLE OF CONTENTS
VSD OIL PUMP GENERAL INFORMATION .......................................................................3
VSD Oil Pump Style Variations ...................................................................................................3
VSD Oil Pump Drive Overview ..................................................................................................3
Known Problems ..........................................................................................................................3
VARIABLE SPEED OIL PUMP DRIVE OPERATION MODEL D CHILLER ...............4
Microcomputer Control Center Operation ...................................................................................4
Automatic Speed Control ............................................................................................................. 6
Manual Speed Control .................................................................................................................. 8
Programming ................................................................................................................................8
Micro Board Changes .................................................................................................................. 9
Standby Lubrication ......................................................................................................................9
SAFETY SHUTDOWNS............................................................................................................ 10
High Oil Flow ............................................................................................................................. 10
Oil Pump Operation After Power Failures................................................................................. 10
Diagnostic Software - Digital Outputs ....................................................................................... 10
FAULT INDICATIONS FROM THE VSOP DRIVE ............................................................11
Oil Pump Drive Status LED.......................................................................................................11
VSOP Drive Okay Relay...........................................................................................................11
Auto-Resettable Shutdowns .......................................................................................................11
Non-Auto-Resettable Shutdowns............................................................................................... 12
TROUBLESHOOTING GUIDE.............................................................................................. 13
DRIVE REPLACEMENT INSTRUCTIONS ........................................................................ 14
MOST FREQUENTLY ASKED QUESTIONS ..................................................................... 16
REMOTE KEYPAD UNIT ....................................................................................................... 17
Operating Instructions ................................................................................................................ 17
SERVICE PARTS LIST ............................................................................................................. 17
MOD D CHILLERS
VSD OIL PUMP GENERAL INFORMATION .................................................................... 18
Objective .................................................................................................................................... 18
VSD Oil Pump Drive Overview ................................................................................................ 18
SAFETY SHUTDOWNS............................................................................................................ 19
Pressure Setpoint Not Achieved The Safety Shutdown OIL – VARIABLE SPEED PUMP –
PRESSURE SETPOINT NOT ACHIEVED has replaced the message for HIGH OIL FLOW .. 19
Diagnostic Software ................................................................................................................... 19
VSOP Drive Okay Relay...........................................................................................................19
Auto Re-settable Shutdowns ......................................................................................................19
Non Auto Re-settable Shutdowns .............................................................................................. 19
TROUBLESHOOTING ............................................................................................................ 20
MOD E CHILLERS

York YK Specifications

General

Model	YK
Type	Centrifugal Chiller
Refrigerant	R-134a
Frequency	50/60 Hz
Compressor Type	Centrifugal
Application	Commercial and Industrial
Cooling Capacity Range	400 to 2, 500 tons
Full Load Efficiency	0.50 to 0.60 kW/ton
Efficiency	Varies by model (See specific model data)
Operating Temperature Range	Varies by model (See specific model data)