Maintenance Notes - Hitachi UTOPIA RAS-4HVRP2E Service Manual

11 Maintenance notes

Index
11.1 General notes ...................................................................................................................................... 326
11.1.1 Checking the power source and the wiring connection ............................................................................. 326
11.1.3 Insufficient cooling performance when a long piping is applied ................................................................. 326
11.1.4 Abnormally high operation sound (in the ceiling type indoor unit) ............................................................. 327
11.1.5 Alarm code "31" ......................................................................................................................................... 327
11.1.6 Not cooling well due to insufficient installation space for the outdoor unit ................................................. 327
11.2 Maintenance work ............................................................................................................................... 328
11.3 Service and maintenance record......................................................................................................... 329
11.4 Service and maintenance record using the 7-segment display ........................................................... 330
11.4.1 Information of Indoor unit ........................................................................................................................... 332
11.4.2 Information of cause code of alarm ........................................................................................................... 332
11.4.3 Information of cause code of alarm record ................................................................................................ 332
11.5 Service and maintenance table through the remote control switch ..................................................... 333
11.5.1 RAS-3HVRC2 ............................................................................................................................................ 333
11.5.2 RAS-(4-6)(V)(R/N)(C/P)2E ........................................................................................................................ 335
11.6 Refrigerant collection method.............................................................................................................. 336
11.6.1 Refrigerant collection method when replacing the parts of outdoor unit .................................................... 336
11.6.2 Refrigerant collection method when replacing indoor unit ......................................................................... 338
323 SMGB0136 rev.0 - 07/2021
11 .
M a i n t e n a n c e n o t e s
11