Hitachi RAS-4-HNPE - Electrial Checks of Main Parts; Maintenance Notes

General Index
xi
SMGB0079 rev.0 - 01/2013
10.4.3.6 Removing electrical box .................................................................................................. 426
10.4.3.7 Removing High pressure switch and pressure switch for control .................................... 430
10.4.3.8 Opening electrical box (P-Mounting Plate) ...................................................................... 430
10.4.3.9 Removing reversing and solenoid valves coils ................................................................ 431
10.4.3.10 Removing electronic expansion valve coil ..................................................................... 432
10.4.3.11 Removing reversing valve ............................................................................................. 433
10.4.3.12 Removing Electronic expansion Valve and Solenoid Valve .......................................... 434
10.4.3.13 Removing electrical components .................................................................................. 435
10.4.3.14 Removing other electrical components ......................................................................... 437
11. Electrial checks of main parts ................................................................................. 439
11.1 Inverter ..................................................................................................................................................440
11.1.1 Specications of inverter ........................................................................................................................... 440
11.1.2 Inverter time chart ...................................................................................................................................... 442
11.1.3 Protective function .................................................................................................................................... 443
11.1.4 Overload control ........................................................................................................................................ 444
11.2 Thermistor .............................................................................................................................................445
11.3 Electronic expansion valve ...................................................................................................................447
11.4 High pressure protection device ...........................................................................................................448
11.5 Noise lter (NF) .....................................................................................................................................450
11.5.1 Noise lter for 3N~ (400V/50Hz) ................................................................................................................ 450
11.5.2 Noise lter for 1~ (230V/50Hz) .................................................................................................................. 451
11.6 Capacitor (CB1 CB2) ............................................................................................................................452
11.7 Reactor (DCL) .......................................................................................................................................453
11.7.1 Reactor (DCL) for 3N~ (400V/50Hz) ......................................................................................................... 453
11.7.2 Reactor (DCL) for 1~ (230V/50Hz) ............................................................................................................ 453
11.8 Scroll compressor .................................................................................................................................454
11.8.1 Reliable mechanism for low vibrating and low sound ................................................................................ 454
11.8.2 Principle of compression ........................................................................................................................... 454
12. Maintenance notes ...................................................................................................455
12.1 General notes .......................................................................................................................................456
12.1.1 Checking the power source and the wiring connection ............................................................................. 456
12.1.2 Burnt-out compressor due to an insufcient refrigerant charge ................................................................ 456
12.1.3 Insufcient cooling performance when a long piping is applied ................................................................ 457
12.1.4 Abnormally high operation sound (in the ceiling type indoor unit). ............................................................ 457
12.1.5 Alarm code “31” ......................................................................................................................................... 458
12.1.6 Not cooling well due to insufcient installation space for the outdoor unit ................................................ 458
12.2 Maintenance work.................................................................................................................................459