46
Installation and Maintenance
Service Manual
●Outdoor unit:
Key detection point
"Test point NO." Test point Related elements Test value under normal condition
Test 1 Between A and C Neutral wire ,live wire 160V-265V
Test 2 Between B and C Neutral wire ,live wire 160V-265V
Test 3 Between D and E Electrolytic capacitor of DC bas bar DC 180V-380V
Test 4 Between F and G Electrolytic capacitor of switch power DC 180V-380V
Test 5 Both ends of diode D59 D59(IPM module +15V) DC 14.5V-15.5
Test 6
Both ends of electrolytic
capacitor C47
C47(+12V power) DC 12V-13V
Test 7
Both ends of electrolytic
capacitor C60
C60(+5V power) DC 5V
Test 8
Both ends of electrolytic
capacitor C73
C73(+3.3V power) DC 3.3V
Test 9 Between S and T Communication circular current DC 56V
Test 10 Between point N and GND
C50 to N terminal (ground) (signal receiving terminal of
outdoor unit)
Jumping between 0V and 3.3V
Test 11 U7 Between 1 and 2 at leading foot of U7 Jumping between 0V and 3.3V
Test 12 Between point M and GND
R77 to N terminal (ground) (signal receiving terminal of
outdoor unit)
Jumping between 0V and 3.3V
Test 13 U8 Between 3 and 4 at leading foot of U8 Jumping between 0V and 3.3V
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