Contents
4-4-3 Water pump & flow switch OFF ...........................................................................................................................71
4-4-4 Water pump & flow switch ON ............................................................................................................................72
4-4-5 Hydro unit temperature sensor(open/short) ................................................................................................73
4-4-6 Communication error after finishing Tracking(Hydro unit)....................................................................74
4-5 Items to check before diagnostics ...............................................................................................................................75
4-5-1 Test run mode and view mode ............................................................................................................................75
4-5-2 Troubleshooting for outdoor unit ......................................................................................................................76
4-5-3 Troubleshooting for outdoor unit(cont.) .........................................................................................................77
4-6 Troubleshooting by symptoms .....................................................................................................................................78
4-6-1 Communication error after finishing tracking (E202) ...............................................................................78
4-6-2 Time out (1min.) of communication error between MAIN PBA and INV. PBA (E203) .................79
4-6-3 Temperature sensor error (E221, E231, E251, E320) ...................................................................................80
4-6-4 Fan error (E458, E475) ..............................................................................................................................................81
4-6-5 Compressor error (E461, E467) ............................................................................................................................83
4-6-6 Current trip error (E462, E463) .............................................................................................................................84
4-6-7 IPM(IGBT module) over current error (E464) .................................................................................................85
4-6-8 DC-link voltage under/over error (E466) .........................................................................................................87
4-6-9 GAS leak error (E554) ................................................................................................................................................88
4-6-10 The other errors ........................................................................................................................................................89
4-6-11 In case of heating at the cooling mode or cooling at the heating mode .....................................90
4-6-12 Outdoor unit is not powered on - Initial diagnosis ..................................................................................92
4-6-13 Outdoor unit power supply error ....................................................................................................................93
5. PCB Diagram ........................................................................................................... 94
5-1 Hydro unit ................................................................................................................................................................................94
5-2 Tank Integrated Hydro Unit / Hydro Unit
...............................................................................
96
5-3 Outdoor Unit...........................................................................................................................................................................98
6. Wiring Diagram ..................................................................................................... 108
6-1 Hydro unit .............................................................................................................................................................................108
6-1-1 1Phase Model ...........................................................................................................................................................108
6-1-2 3Phase Model ............................................................................................................................................................109
6-2 Outdoor Unit........................................................................................................................................................................110
6-3 Tank Integrated Hydro Unit ...........................................................................................................................................113
7. Piping Diagram ..................................................................................................... 114
7-1 Piping Diagram ..................................................................................................................................................................114
8. Reference Sheet .................................................................................................... 120
8-1 Index for Model Name.....................................................................................................................................................120
8-1-1 Outdoor Unit / Hydro Unit ..................................................................................................................................120