Mitsubishi Electric MSZ-FD VA Series Service Manual page 54

3. Noise filter P.C. board
MUZ-FD50VA
CN901
To electronic
control P.C.
board
CN912
R.V. coil
230 VAC
230 VAC
Output
4. Outdoor power board
MUZ-FD50VA
325-370 VDC
Output
(Red)
(+) 1
(–) 3
(White)
CN903
CN902
To power
To power
board
board
F64 FUSE
NR64 VARISTOR
250 V 2 A
54
230 VAC
Input
CN61
230 VAC
Output
Connect to the compressor
Voltage among phases: 5 to 180 V
Connect to the earth
CN2
Connect to the controller board
(+)1-5(–): Signal transmission
(To electronic control P.C. board)
5 VDC pulse wave
(+)2-5(–): Zero cross signal
3-4 : Not used
(+)6-5(–): 15 V
(+)7-5(–): 15 V
CN3
Fin temperature thermistor RT64
Signal reception (From
electronic control P.C. board)
5 VDC pulse wave
CN5
Primary current detection
(Connect to the noise filter)