Mitsubishi Electric Mr.Slim MUZ-FD09NA Service Manual page 31

10-6. TEST POINT DIAGRAM AND VOLTAGE
1. Inverter P.C. board
MUZ-FD09NA MUZ-FD12NA
Back side of unit
AC 208/230 V
Fuse (F901)
250 V 3.15 A
Output to
drive com-
pressor
(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
-4 14 32 50
Temperature(°F)
Smoothing
capacitor
DB61
(C63)
DC260 ~300 V
(-) (+)
Discharge temperature thermistor(RT62)
700
600
500
400
300
200
100
0
32 50 68
68 86 104
Smoothing
Smoothing
capacitor
capacitor
(C62) (C61)
Fuse (F801)
250 V 3.15 A
LEV
connector
(CN724)
86 104 122 140 158 176 194 212 230 248
Temperature(°F)
31
Fuse (F701)
250 V 3.15 A
R.V. coil
(CN721)
208/230 VAC
Jumper wire
Jumper wire for
for pre-heat
changing defrost
control setting
setting (JS)
(JK)
Fin temperature thermistor(RT64)
200
180
160
140
120
100
80
60
40
20
0
32 50 68 86 104 122 140 158 176
Temperature(°F)
AC208/230 V