Hitachi RAS-8FSXN - Page 7

11.3.5 Thermistor for super cooling bypass and main line temperature of outdoor unit........................ 338
11.4 Electronic expansion valve......................................................................................................... 339
11.5 Pressure sensor......................................................................................................................... 340
11.5.1 High pressure control.................................................................................................................. 340
11.5.2 Low pressure control................................................................................................................... 340
11.6 High pressure protection device................................................................................................. 341
11.7 Noise filter (NF1, NF2)............................................................................................................... 342
11.8 Capacitors (CB1 and CB2 / CB3)............................................................................................... 344
11.9 Reactor (DCL1 and DCL2)......................................................................................................... 345
12 Maintenance notes.......................................................................................... 347
12.1 Checking the power source and the wiring connection.............................................................. 348
12.2 Burnt-out compressor due to an insufficient refrigerant charge................................................. 349
12.3 Alarm code "31".......................................................................................................................... 350
12.4 Not cooling well due to insufficient installation space for the outdoor unit................................. 351
12.5 Precautions in the event of refrigerant leaks.............................................................................. 352
12.5.1 Maximum permissible concentration of hydrofluorocarbon (HFC).............................................. 352
12.5.2 Calculation of the refrigerant concentration................................................................................ 352
12.5.3 Countermeasures in the event of refrigerant leaks..................................................................... 352
12.6 Maintenance work...................................................................................................................... 354
12.7 Service and maintenance table through the 7-segment display................................................. 355
12.8 Service and maintenance table through the remote control switch............................................ 357
12.9 Service and maintenance table.................................................................................................. 359
12.10 Saturation curve for refrigerant................................................................................................... 361
12.11 Mollier chart for R410A............................................................................................................... 362
12.12 How to collect refrigerant............................................................................................................ 363
Index
vii
SMGB0065 rev. 1 - 12/2010