Mitsubishi Electric MSZ-FD VA Series Service Manual page 52

11-6. TEST POINT DIAGRAM AND VOLTAGE
1. Inverter P.C. board
MUZ-FD25VA MUZ-FD25VAH MUZ-FD35VA MUZ-FD35VAH
Back side of unit
AC 230 V
Fuse (F901)
250 V 3.15 A
Output to
drive
compressor
(LDU,
LDV,
LDW)
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( )
Bus-bar voltage
DB61
DC 260 - 300 V
(-) (+)
Discharge temperature thermistor(RT62)
700
600
500
400
300
200
100
0
0 10 20
20 30 40
Smoothing
Smoothing
capacitor capacitor
(C63) (C62)
Fuse (F801)
250 V 3.15 A
30 40 50 60 70 80 90 100 110 120
Temperature( )
52
Smoothing
capacitor
Fuse (F701)
(C61)
250 V 3.15 A
LEV
Jumper wire for
connector
changing defrost
(CN724)
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( )
Heater
connector
(CN722)
MUZ-FD•VAH
R.V.coil
(CN721)
230 VAC
AC 230 V
Jumper wire
for pre-heat
control setting
(JK)