Hitachi RAS-(2-6)HVNP1(E), Service Manual

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General index
xi
SMGB0087 rev.0 - 12/2013
10.9.6 Removing electrical box ............................................................................................................................ 442
10.9.7 Removing the compressor ........................................................................................................................ 443
10.9.8 Removing High pressure switch and pressure switch for control .............................................................. 446
10.9.9 Opening electrical box (P-Mounting Plate) ................................................................................................ 446
10.9.10 Removing reversing and solenoid valves coils ........................................................................................ 447
10.9.11 Removing electronic expansion valve coil ............................................................................................... 447
10.9.12 Removing reversing valve ....................................................................................................................... 448
10.9.13 Removing Electronic expansion Valve and Solenoid Valve .................................................................... 449
10.9.14 Removing electrical components ............................................................................................................ 450
10.9.15 Removing other electrical components ................................................................................................... 451
11. Electrical checks of main parts ............................................................................453
11.1 Inverter ..................................................................................................................................................454
11.1.1 Specifications of inverter ........................................................................................................................... 454
11.1.2 Inverter time chart ...................................................................................................................................... 456
11.1.3 Protective function ..................................................................................................................................... 457
11.1.4 Overload control ........................................................................................................................................ 458
11.2 Thermistor .............................................................................................................................................459
11.3 Electronic expansion valve ...................................................................................................................462
11.4 High pressure protection device ...........................................................................................................463
11.5 Noise filter (NF) .....................................................................................................................................465
11.5.1 Noise filter for 3N~ (400V/50Hz) ................................................................................................................ 465
11.5.2 Noise filter for 1~ (230V/50Hz) .................................................................................................................. 466
11.6 Capacitor (CB1 CB2) 8/10/12 HP only ..................................................................................................467
11.7 Reactor (DCL) .......................................................................................................................................468
11.7.1 Reactor (DCL) for 3N~ (400V/50Hz) ......................................................................................................... 468
11.7.2 Reactor (DCL) for 1~ (230V/50Hz) ............................................................................................................ 468
11.8 Scroll compressor .................................................................................................................................469
11.8.1 Reliable mechanism for low vibrating and low sound ................................................................................ 469
11.8.2 Principle of compression ........................................................................................................................... 469
12. Maintenance notes ................................................................................................. 471
12.1 General notes .......................................................................................................................................472
12.1.1 Checking the power source and the wiring connection ............................................................................. 472
12.1.2 Burnt-out compressor due to an insufficient refrigerant charge ................................................................ 472
12.1.3 Insufficient cooling performance when a long piping is applied ................................................................ 473
12.1.4 Abnormally high operation sound (in the ceiling type indoor unit) ............................................................. 473
12.1.5 Alarm code “03” ......................................................................................................................................... 474
12.1.6 Not cooling well due to insufficient installation space for the outdoor unit ................................................ 474