Mitsubishi Electric Mr.SLIM SUZ-M25VA-ER Technical & Service Manual page 36

11-6. TEST POINT DIAGRAM AND VOLTAGE
11-6-1. Inverter P.C. board
SUZ-M25VA.TH
SUZ-M25VAR1.TH
SUZ-M25VAR2.TH
SUZ-M25VA-ET.TH
SUZ-M25VA-ETR2.TH
SUZ-M25VA-ERR2.TH
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)
Front side of unit
Fin temperature
thermistor/RT64
(CN642)
Signal of outdoor
fan motor (CN931)
Ambient temperature
thermistor/RT65
(CN643)
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( )
OCH684G
SUZ-M35VA.TH
SUZ-M35VAR1.TH
SUZ-M35VAR2.TH
SUZ-M35VA-ET.TH
SUZ-M35VA-ETR2.TH
SUZ-M35VA-ERR2.TH
Smoothing
DB61
capacitor
260 - 370 V DC
(C63)
(-)
(+)
Fuse (F901)
T3.15AL250V
Defrost thermistor
/RT61(CN641)
Discharge temperature
thermistor/RT62
(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
SUZ-M50VA.TH
SUZ-M50VAR1.TH
SUZ-M50VAR2.TH
SUZ-M50VA-ET.TH
SUZ-M50VA-ETR2.TH
SUZ-M50VA-ERR2.TH
Smoothing
Smoothing
capacitor
capacitor (C61)
(C62)
(SUZ-M35/50)
Fuse (F801)
T3.15AL250V
LED
LEV (CN724)
Outdoor heat exchanger
temperature thermistor
/RT68 (CN644)
Temperature (°C)
36
R.V.coil
Defrost heater
(CN721)
(CN722)
230 V AC
Fuse (F701)
T3.15AL250V
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
0 10 20 30 40 50 60 70 80
Temperature( )
Fuse (F61)
25 A 250V
230 V AC