Mitsubishi Electric MXZ-2D33VA-E1 Service Manual page 91

11-7. TEST POINT DIAGRAM AND VOLTAGE
1. Inverter P.C. board
MXZ-2D33VA MXZ-2D40VA MXZ-2D53VA MXZ-2D53VAH
Back side of unit
230V AC 250 - 325V 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
Fin temperature thermistor (RT64)
200
180
160
140
120
100
80
60
40
20
0
0 10 20 30 40 50 60 70 80
OBH626B
FUSE (F901) Smoothing capacitor
T3.15AL250V (C61, C62, C63)
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
FUSE (F801)
T3.15AL250V
Outdoor heat
exchanger temperature
thermistor /RT68 (CN644)
Discharge temperature
thermistor/RT62 (CN641)
Defrost thermistor/RT61 (CN641)
Discharge temperature thermistor (RT62)
700
600
500
400
300
200
100
0
0
10 20 30 40
91
R.V. coil (CN721)
Heater (CN722)
MXZ-2D53VAH
FUSE (F701)
T3.15AL250V
230V AC
(X64
Connect to
outdoor dis-
play P.C.
board
(CN935)
230V AC
(LD61, LD62)
230V AC
(CN601
Serial signal A
(CN601
Serial signal B
(CN601
CN602
LEV A coil
(CN724)
LEV B coil
(CN725)
10 20 30 40 50 60 70 80 90 100 110 120
, LD66B)
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