Mitsubishi Electric MUZ-LN25VG-E1 Service Manual page 71

12-6. TEST POINT DIAGRAM AND VOLTAGE
1. Inverter P.C. board
MUZ-LN25VG
Back side of unit
230 VAC
Fuse (F901)
T3.15AL250V
Output to
drive
compressor
(LDU,
LDV,
LDW)
Output to
drive outdoor
fan motor
(CN932)
Front side of unit
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 10
Temperature( )
OBH767G
MUZ-LN35VG
Smoothing
capacitor
DB61
(C63)
260 - 370 V DC
(-) (+)
Discharge temperature thermistor (RT62)
800
700
600
500
400
300
200
100
0
0 10 20 30 40 50 60 70 80 90 100 110 120
20 30 40
MUZ-LN50VG
Smoothing Smoothing
capacitor capacitor
(C62)
(C61)
(LN50)
Fuse (F801)
T3.15AL250V
Temperature (°C)
71
MUZ-LN50VG2- ,
E1
R.V. coil
(CN721)
230 V AC
LED
Jumper wire
for pre-heat
control setting
(JK)
Fin temperature thermistor(RT64)
200
180
160
140
120
100
80
60
40
20
0
0 10 20 30 40 50 60 70 80
Temperature( )
, ,
ET1 ER1 E2
Fuse (F701)
T3.15AL250V
230 V AC
Jumper wire for
changing defrost
setting (JS)