Service manual

44
-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)
Temperature( )
Discharge temperature thermistor(RT62)
0 102030405060708090100110120
0
100
200
300
400
500
600
700
0 1020304050607080
0
20
40
60
80
100
120
140
160
180
200
Temperature( )
Fin temperature thermistor(RT64)
Resistance(k )
Resistance(k )
Resistance(k )
1. Inverter P.C. board
MUZ-SF25VE MUZ-SF25VEH MUZ-SF35VE MUZ-SF35VEH
MUZ-SF42VE MUZ-SF42VEH MUZ-SF50VE MUZ-SF50VEH
11-6. TEST POINT DIAGRAM AND VOLTAGE
Fin temperature thermistor/RT64 (CN642)
Ambient temperature thermistor/RT65 (CN643)
Discharge temperature thermistor/RT62 (CN641)
Defrost thermistor /RT61(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-SF42/50
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 /RT68 (CN644)
Jumper wire
for pre-heat
control setting
(JK)
Heater connector
(CN722)
MUZ-SF25/35VEH
MUZ-SF42/50VEH
Fuse (F801)
T3.15AL250V
Back side of unit
LEV connector (CN724)
Output to
drive outdoor
fan motor
(CN932)
LED
OBH629