Obh629A - Mitsubishi Electric MUZ-SF25VE-E1 Service Manual

11-6. TEST POINT DIAGRAM AND VOLTAGE
1. Inverter P.C. board
MUZ-SF25VE MUZ-SF25VEH MUZ-SF35VE MUZ-SF35VEH
MUZ-SF42VE MUZ-SF42VEH MUZ-SF50VE MUZ-SF50VEH
Back side of unit
230 VAC
Fuse (F901)
T3.15AL250V
Output to
drive outdoor
fan motor
(CN932)
Output to
drive
compressor
(LDU,
LDV,
LDW)
LED
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( )

OBH629A

Smoothing
capacitor (C63)
DB61
MUZ-SF42/50
260 - 370 VDC
(-) (+)
Discharge temperature thermistor(RT62)
700
600
500
400
300
200
100
0
0 10 20
20 30 40
Smoothing
capacitor
(C62)
Fuse (F801)
T3.15AL250V
30 40 50 60 70 80 90 100 110 120
Temperature( )
44
Heater connector
(CN722)
Smoothing
R.V.coil
MUZ-SF25/35VEH
capacitor (CN721)
MUZ-SF42/50VEH
(C61) 230 VAC
Jumper wire for
changing defrost
setting (JS)
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
230 VAC
Jumper wire
for pre-heat
control setting
(JK)