40
-20
-10
0
10
20
30
40
0
10
20
30
40
50
60
70
80
90
100
Temperature (°C)
Defrost thermistor (RT61)
Temperature (°C)
Discharge temperature thermistor (RT62)
0
10
20
30
40
50
60
70
80
90 100 110 120
0
100
200
300
400
500
600
700
0 10 20 30 40 50 60 70 80
0
20
40
60
80
100
120
140
160
180
200
Temperature (°C)
Fin temperature thermistor (RT64)
Resistance (k
Ω
)
Resistance (k
Ω
)
Resistance (k
Ω
)
1. Inverter P.C. board
MUZ-HJ25VA MUZ-HJ35VA
11-6. TEST POINT DIAGRAM AND VOLTAGE
Back side of unit
Fin temperature
thermistor/R
T64
(CN642)
Discharge temperature
thermistor/R
T62
(CN641)
Defrost thermistor/R
T61
(CN641)
230 VAC
Jumper wire for changing
defrost setting (JS)
Front side of unit
DB61
250 V - 370 VDC
Output to
drive
compressor
(LDW,
LDV,
LDU)
LED
(+)
(-)
Fuse (F801)
T3.15AL250V
Jumper wire for pre-heat
control setting (JK)
230 VAC
LEV connector
(CN724)
Output to drive outdoor
fan motor (CN771)
R.V. coil
(CN721)
Smoothing
capacitor (C61)
Fuse (F701)
T3.15AL250V
OBH648A
