York Floor Ceiling R-410A 50Hz Service Manual download pdf (Page 8)

General information

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c. This process controls the On/Off time of the valve and the rotating refrigerants in the

circle thus adjusting the capacity.

d. The cooling capacity of the outdoor units is adjusted automatically, according to the

number of operating indoor unit(s).

[3] PWM (Pulse Width Modulation) Valve

PWM valve is the valve to take away the fixed scroll by lifting up through the difference

of pressure after the digital scroll compressor being connected to the outlet and inlet of suction.

Therefore, the capacity of compressor is controlled automatically according to the operation

status such as loading when the valve is closed or unloading when the valve is opened. PWM

means the ON/OFF signal to the valve for loading /unloading.

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TECHNICAL SERVICE MANUAL 1
Part I General Information 5
Contents 18
Part 3 Outdoor 27
YDS-100WC15/35 50
YDS-140WC15/35 50
A 624 1030 52
B 55 52
C 1030 52
Part 4.1 Four-way cassette 72
Piping: 8m (horizontal) 79
Notes: 80
YDS-28-80KC 230 170 89
YDS-90-140KC 300 190 89
Indoor unit H(mm) 90
YDS-28-80KC ≥260 90
YDS-90-140KC ≥300 90
YDS-22-56GC ≥280 90
- 100 101
- 101 102
Part 4.2 Wall Mounted 103
- 103 104
- 104 105
- 105 106
- 106 107
- 107 108
3. Capacity table 109
- 109 110
- 110 111
- 111 112
- 112 113
- 114 115
- 115 116
- 116 117
- 117 118
YDS-45-56EC/HC 119
- 119 120
- 120 121
- 121 122
- 122 123
- 123 124
- 124 125
- 125 126
- 126 127
- 127 128
- 128 129
- 129 130
- 130 131
- 131 132
- 132 133
- 133 134
- 134 135
- 135 136
- 136 137
- 137 138
- 138 139
- 139 140
- 140 141
- 141 142
- 142 143
- 143 144
- 144 145
- 145 146
- 146 147
- 147 148
- 148 149
- 149 150
- 150 151
Part 4.4 Medium ESP Duct 152
- 152 153
- 153 154
- 154 155
- 155 156
- 156 157
- 157 158
- 158 159
- 159 160
- 160 161
- 161 162
- 162 163
- 163 164
- 164 165
- 165 166
- 166 167
- 168 169
- 169 170
- 170 171
- 171 172
- 172 173
- 173 174
- 174 175
- 175 176
- 177 178
- 178 179
- 179 180
- 180 181
- 181 182
- 182 183
- 183 184
- 184 185
- 185 186
- 186 187
- 187 188
- 188 189
- 189 190
- 190 191
- 191 192
- 192 193
- 193 194
- 194 195
- 195 196
- 197 198
- 198 199
- 200 201
- 201 202
- 202 203
- 203 204
- 204 205
- 205 206
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- 209 210
- 210 211
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- 212 213
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- 214 215
- 215 216
- 216 217
- 217 218
- 218 219
- 219 220
- 220 221
- 221 222
- 222 223
- 223 224
- 224 225
- 225 226
- 226 227
- 227 228
- 229 230
- 232 233
- 233 234
- 234 235
- 235 236
- 237 238
- 238 239
Part 5 Installation 240
- 240 241
- 241 242
- 242 243
- 243 244
- 244 245
- 245 246
- 246 247
- 249 250
- 250 251
- 252 253
- 253 254
- 254 255
- 255 256
- 256 257
- 257 258
- 259 260
- 260 261
- 261 262
- 262 263
- 263 264
- 264 265
- 265 266
- 266 267
- 267 268
- 268 269
- 269 270
- 270 271
- 271 272
- 272 273
- 273 274
- 275 276
- 276 277
- 277 278
- 278 279
- 279 280
Gr ounded wi r e 281
- 281 282
- 282 283
- 283 284
- 284 285
- 285 286
- 286 287
- 287 288
Part 6 Control System 289
- 289 290
- 290 291
- 292 293
- 293 294
- 295 296
- 298 299
- 299 300
- 300 301
- 301 302
- 302 303
- 303 304
- 304 305
- 305 306
- 306 307
- 307 308
- 308 309
- 309 310
- 310 311
- 311 312
- 312 313
- 313 314
- 314 315
- 315 316
- 316 317
- 317 318
- 318 319
- 319 320
- 320 321
- 321 322
- 322 323
- 323 324
- 325 326
- 327 328
- 328 329
- 329 330
- 330 331
- 331 332
- 332 333
- 333 334
- 334 335
- 335 336
- 336 337
- 337 338
- 338 339
- 339 340
- 340 341
- 341 342
- 342 343
- 343 344
- 344 345
- 345 346
- 346 347
- 347 348
- 348 349
- 349 350
- 350 351
- 351 352
- 352 353
- 353 354
- 354 355
- 355 356
- 356 357
- 357 358
- 358 359
- 359 360
- 360 361
- 361 362
- 362 363
- 363 364
- 364 365
- 365 366
- 366 367
- 367 368
- 368 369
- 369 370
- 370 371
- 371 372
- 372 373
- 373 374
- 374 375
- 375 376
- 376 377
- 377 378
- 378 379
- 379 380
- 380 381
- 381 382
- 382 383
- 383 384
Form No. 035M00457-000 385
2009 Johnson Controls, Inc 385

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York Floor Ceiling R-410A 50Hz Service Manual Page 8

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