Table Of Contents - Hitachi Utopia RPI-2.5HRG Service Manual

No.
1. TROUBLESHOOTING ............................................................................................................................... 1-1
1.1 Initial Troubleshooting .......................................................................................................................... 1-1
1.1.1 Rotary Switch and Dip Switch Setting .......................................................................................... 1-1
1.1.2 Checking of Electrical Wiring ........................................................................................................ 1-5
1.1.3 Checking by 7-Segment Display ................................................................................................. 1-6
1.1.4 Failure of Power Supply to Indoor Unit and Remote Control Switch ............................................ 1-7
1.1.5 Abnormal Transmission between Remote Control Switch and Indoor Unit .................................. 1-8
1.1.6 Abnormalities of Devices .............................................................................................................. 1-9
1.2 Troubleshooting Procedure .................................................................................................................. 1-17
1.2.1 Alarm Code Table ......................................................................................................................... 1-17
1.2.2 Troubleshooting by Alarm Code ................................................................................................... 1-18
1.2.3 Troubleshooting in Check Mode by Remote Control Switch ........................................................ 1-53
1.2.4 Troubleshooting by 7-Segment Display ........................................................................................ 1-59
1.2.5 Protection Control Code on 7-Segment Display ........................................................................... 1-61
1.2.6 Function of LEDs .......................................................................................................................... 1-62
1.3 Procedure of Checking Each Main Parts ............................................................................................. 1-64
1.3.1 Self-Checking of PCBs using Remote Control Switch .................................................................. 1-64
1.3.2 Self-Checking of Remote Control Switch ..................................................................................... 1-66
1.3.3 Procedure of Checking Other Main Parts ..................................................................................... 1-68
2. SERVICING ................................................................................................................................................ 2-1
2.1 Outdoor Unit ......................................................................................................................................... 2-1
2.1.1 Removing Service Cover .............................................................................................................. 2-1
2.1.2 Removing Air Outlet Grille ............................................................................................................ 2-1
2.1.3 Removing Outdoor Fan ................................................................................................................ 2-2
2.1.4 Removing Outdoor Fan Motor ...................................................................................................... 2-2
2.1.5 Removing Compressor ................................................................................................................. 2-3
2.1.6 Removing High Pressure Switch and Pressure Switch for Control .............................................. 2-5
2.1.7 Removing Coil for Reversing Valve .............................................................................................. 2-6
2.1.8 Removing Coil for Expansion Valve ............................................................................................. 2-7
2.1.9 Removing Printed Circuit Board (PCB1) ...................................................................................... 2-8
2.1.10 Removing ISPM and ACT Module ................................................................................................ 2-9
2.1.11 Removing Electrical Components ................................................................................................ 2-11
2.2 Indoor Unit
* Refer to Service Manual P5413553
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