Mitsubishi Electric MUZ-EF25VG Service Manual page 49

12-6. TEST POINT DIAGRAM AND VOLTAGE
1. Inverter P.C. board
MUZ-EF25VG MUZ-EF35VG
MUZ-EF25VGH MUZ-EF35VGH
Back side of unit
230 V AC
Fuse (F62)
15 A 250 V
Output to
drive
compressor
(LDU,
LDV,
LDW)
Output to
drive outdoor
fan motor
(CN932)
Fin temperature
thermistor/RT64
(CN642)
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( )
OBH832
MUZ-EF42VG
DB61
Smoothing
260 - 370 V DC
capacitor
(-)
(+)
(C63)
Fuse (F901)
T3.15AL250V
Signal of outdoor
fan motor (CN931)
Ambient temperature
thermistor/RT65
(CN643)
Defrost thermistor
/RT61(CN641)
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-EF50VG
Smoothing Smoothing capacitor (C61)
capacitor (MUZ-EF42/50VG)
(C62)
Expansion valve coil/
LEV (CN724)
Outdoor heat exchanger
temperature thermistor
/RT68 (CN644)
Discharge temperature
thermistor/RT62
(CN641)
Temperature (°C)
49
R.V.coil/21S4
(CN721) 230 V AC
Defrost heater
(CN722)
(MUZ-EF•VGH)
Fuse (F801)
T3.15AL250V
LED
Jumper wire for
changing defrost
setting (JS)
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( )
Fuse (F701)
T3.15AL250V
Fuse (F61)
25 A 250V
230 V AC