Mitsubishi Electric MXZ-2B30VA Service Manual page 83

11-7. TEST POINT DIAGRAM AND VOLTAGE
1. Inverter P.C. board
MXZ-2B30VA MXZ-2B40VA MXZ-2B52VA
Back side of unit
Output to
drive
compressor
(LDW,
LDV,
LDU)
Front side of unit
Fin temperature thermistor (RT64)
200
180
160
140
120
100
80
60
40
20
0
0 10 20 30 40 50 60 70 80
OBH554D
230V AC
Input
325V DC
Defrost thermistor (RT61)
Ambient temperature thermistor (RT65)
Outdoor heat exchanger
temperature thermistor (RT68)
100
90
80
70
60
50
40
30
20
10
0
-20 -10 0
8V DC
5V DC 12V DC
Discharge temperature thermistor (RT62)
700
600
500
400
300
200
100
0
0
10 20 30 40
83
FUSE(F801) FUSE(F901)
T3.15AL250V T3.15AL250V
Output to drive
outdoor fan motor
(CN932)
To fan motor
10 20 30 40 50 60 70 80 90 100 110 120
JK,JGO
To
interface
P.C. board
(CN937)
LEV A
(CN791)
LEV B
(CN792)