50
1. Inverter P.C. board
MUZ-EF25VE MUZ-EF25VEH MUZ-EF35VE MUZ-EF35VEH MUZ-EF42VE MUZ-EF50VE
11-6. TEST POINT DIAGRAM AND VOLTAGE
Fin temperature
thermistor/R
T64
(CN642)
Ambient temperature
thermistor/R
T65
(CN643)
Discharge temperature
thermistor/R
T62
(CN641)
Defrost thermistor
/R
T61(CN641)
DB61
260 - 370 VDC
Front side of unit
230 VAC
Smoothing
capacitor
(C62)
Output to
drive
compressor
(LDU,
LDV,
LDW)
(+)
(-)
Fuse (F701)
T3.15AL250V
Smoothing
capacitor
(C61)
Smoothing
capacitor (C63)
MUZ-EF42/50VE
Fuse (F901)
T3.15AL250V
R.V.coil
(CN721)
230 VAC
Jumper wire for
changing defrost
setting (JS)
Signal of outdoor
fan motor (CN931)
230 VAC
Outdoor heat exchanger
temperature thermistor
/R
T68 (CN644)
Jumper wire
for pre-heat
control setting
(JK)
Heater connector
(CN722)
MUZ-EF25/35VEH
MUZ-EF42/50VE
Fuse (F801)
T3.15AL250V
Back side of unit
LEV connector
(CN724)
Output to
drive outdoor
fan motor
(CN932)
LED
-20
-10
0
10
20
30
40
0
10
20
30
40
50
60
70
80
90
100
Temperature( )
Defrost thermistor (RT61)
Ambient temperature thermistor (RT65)
Outdoor heat exchanger temperature thermistor (RT68)
0
10 20 30 40 50 60 70 80
0
20
40
60
80
100
120
140
160
180
200
Temperature( )
Fin temperature thermistor (RT64)
Resistance(k )
Resistance(k )
0
100
200
300
400
500
600
700
800
0
10 20 30 40 50 60 70 80 90 100 110 120
Temperature( )
Discharge temperature thermistor (RT62)
Resistance(k )
OBH590G
