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LOAD LIMITING CONTROL ..............................150
CONTROLLER ......................................................153
Valve Controller & Control Algorithm ..............153
ECONOMIZER CONTROL ...................................156
CONDENSER FAN CONTROL ............................157
CONTROL OPERATION .......................................159
Local Current Limit Control ..............................161
Pulldown Current Limit Setpoint .......................161
REMOTE CURRENT LIMIT RESET ..................162
Sound Limit Controls .........................................164
SECTION 8 - MICROPANEL
VSD OPERATION & CONTROLS .......................166
VSD Cooling and Cooling Loop ........................168
VSD SAFETIES .....................................................172
IBGT Gate Driver (Hardware) Fault ..................175
Power Supply (Hardware) Fault .........................177
UNIT WARNINGS .................................................180
UNIT SAFETIES ....................................................184
SYSTEM SAFETIES..............................................186
STATUS KEY .........................................................192
UNIT DATA KEY ...................................................196
SYSTEM DATA KEY .............................................198
VSD DATA KEY ....................................................202
OPERATING HOURS & START KEYS ...............204
HISTORY KEY .......................................................205
Unit Data.............................................................207
VSD Data ............................................................207
System Data ........................................................208
Compressor Operating Hours & Starts ...............210
Chilled Liquid & Cooling Setpoints ..................210
Options................................................................210
Program Values ................................................... 211
SETPOINTS KEY ..................................................213
PROGRAM KEY ....................................................215
OPTIONS KEY .......................................................218
DATE/TIME & SCHEDULE KEY ........................222
Date/Time Key ....................................................222
Schedule Key ......................................................223
Unit Operating Schedule ....................................224
Sound Limit Schedule ........................................225
MANUAL OVERRIDE KEY .................................226
PRINT KEY ............................................................227
Operating Data Printout ......................................228
History Data Printout ..........................................229
SERVICE KEY .......................................................230
SYSTEM SWITCHES KEY ...................................236
SERIAL NUMBER PROGRAMMING .................237
JOHNSON CONTROLS
TABLE OF CONTENTS (CONT'D)
UNIT SETUP MODE .............................................240
DEFAULT PROGRAMMABLE VALUES ............242
SERIAL PORT CONNECTIONS ...........................243
ANALOG INPUT CONNECTIONS ......................244
DIGITAL INPUT CONNECTIONS .......................246
ANALOG OUTPUT CONNECTIONS ..................248
DIGITAL OUTPUT CONNECTIONS ...................250
& TRANSMITTED DATA .....................................252
SECTION 9 - MAINTENANCE
R-134A CONVERSION TABLES .........................258
MAINTENANCE ...................................................259
General Requirements ........................................259
MAINTENANCE REQUIREMENTS ...................260
TROUBLESHOOTING GUIDE ............................262
EVACUATING A SYSTEM ...................................264
WARRANTY POLICY ...........................................265
New Equipment ..................................................265
Reconditioned or Replacement Materials...........265
All Warranties are VIOD if .................................265
SENSOR INPUT VOLTAGE TABLE ....................266
VOLTAGE TABLE .................................................266
VOLTAGE TABLE .................................................268
RESISTANCE TABLE ...........................................269
& MAXIMUM VSD FREQUENCY ......................270
PRINTER WIRING ................................................271
Okidata 184.........................................................272
Weigh-Tronix IMP Model 2600 .........................272
Seiko ...................................................................272
OPERATING LOG .................................................273
Site and Chiller Info ...........................................273
Programmed Values ............................................273
Unit Operating Temperature, Pressures,
& Currents .......................................................274
System Operating Conditions .............................275
Water System Conditions ...................................276
Condensor Conditions ........................................276
RECOMMENDED SPARE PARTS .......................277
FORM 201.21-NM2 (616)
7
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