54
Service Manual
Installation and Maintenance
Test Point SN Test Point Related Specication Test Value in normal condition
1 Between AC-L1 and N1 Neutral and live wire 165 V ~ 253 V
2 Left side of R201, radiator U404 DC bus bar 230 V ~ 380 V
3 Top of D304, Bottom of D304 IPM drive voltage +15V 13.5 V ~15.5 V
4 Top of C116, bottom of C116 Relay drive voltage +12V 11 V ~13 V
5 Right side of R228, left side of R228 PFC drive voltage +15V 13.5 V ~15.5 V
6 Left and top ends of U4, bottom of U4 Chip +3.3V 3.1 V ~3.3 V
7 Right and top ends of U4, bottom of U4 +5V 4.8 V ~5.1 V
8 Bottom of R506, bottom of U4 Outdoor unit receiving signal Fluctuate between 0 and 3.3V
9 Bottom of R523, bottom of U4 Outdoor unit sending signal Fluctuate between 0 and 3.3V
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