Mitsubishi Electric MXZ-2F33VF -E1 Service Manual page 176

12-7. TEST POINT DIAGRAM AND VOLTAGE
1. Inverter P.C. board
MXZ-2F33VF MXZ-2F42VF
MXZ-2F33VF2 MXZ-2F42VF2 MXZ-2F53VF2 MXZ-2F53VFH2
MXZ-2F33VF3 MXZ-2F42VF3 MXZ-2F53VF3 MXZ-2F53VFH3
Back side of unit
220-230-240 V AC 280 - 370 V DC
(LD66A, LD70) (DB61(+), (-))
Output to
Output to drive
drive
compressor
outdoor fan
(LDU, LDV, LDW)
motor
Fin temperature
(CN932)
thermistor/RT64
(CN642)
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 (°C)
OBH790H
MXZ-2F53VF
FUSE (F901)
T3.15AL250V
Signal of
outdoor fan motor
(CN931)
Ambient temperature
thermistor /RT65
(CN643)
Discharge temperature thermistor (RT62)
800
700
600
500
400
300
200
100
0
20 30 40 0 10 20 30 40 50 60 70 80 90 100 110 120
MXZ-2F53VFH
Smoothing capacitor FUSE (F801)
(C61, C62, C63) T3.15AL250V
Outdoor heat
exchanger temperature
thermistor /RT68 (CN644)
Discharge temperature
thermistor/RT62 (CN641)
Defrost thermistor/RT61 (CN641)
Temperature (°C)
176
R.V. coil/21S4 (CN721)
Heater (CN722)
MXZ-2F53VFH, MXZ-2F53VFH2,
MXZ-2F53VFH3
FUSE (F701)
T3.15AL250V
220-230-240 V AC
(X64
Connect to
outdoor dis-
play P.C.
board
(CN935)
220-230-240 V AC
(LD61, LD62)
220-230-240 V AC
(CN601
Serial signal A
(CN601
Serial signal B
(CN601
CN602
LEV A coil
(CN724)
LEV B coil
(CN725)
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 (°C)
, LD66B)
, )
, )
,
)