Mitsubishi SUZ-KA18NA2, Service Manual

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30
OCH688A
Inverter P.C. board
SUZ-KA18NA(H)2.TH
10-6. TEST POINT DIAGRAM AND VOLTAGE
-4 14 32 50 68 86 104
0
10
20
30
40
50
60
70
80
90
100
Temperature(°F)
Defrost thermistor(RT61)
Ambient temperature thermistor(RT65)
Outdoor heat exchanger temperature thermistor(RT68)
32 50 68 86 104 122 140 158 176
0
20
40
60
80
100
120
140
160
180
200
Temperature(°F)
Fin temperature thermistor(RT64)
5HVLVWDQFHNŸ
5HVLVWDQFHNŸ
Temperature (°F)
Discharge temperature thermistor (RT62)
5HVLVWDQFHNŸ
0
100
200
300
400
500
600
700
800
32 50 68 86 104 122 140 158 176 194 212 230 248
Fin temperature
thermistor/RT64
(CN642)
Ambient temperature
thermistor/RT65
(CN643)
Discharge temperature
thermistor/RT62
(CN641)
Defrost thermistor
/RT61(CN641)
DB61
260 - 370 V DC
Front side of unit
208/230 V AC
Output to
drive
compressor
(LDU,
LDV,
LDW)
(+) (-)
Fuse (F701)
T3.15AL250V
R.V.coil
(CN721)
208/230 V AC
Jumper wire for
changing defrost
setting (JS)
Signal of outdoor
fan motor (CN931)
208/230
V AC
Outdoor heat exchanger
temperature thermistor
/RT68 (CN644)
Jumper wire
for pre-heat
control setting
(JK)
Fuse (F801)
T3.15AL250V
Back side of unit
LEV (CN724)
Output to
drive outdoor
fan motor
(CN932)
LED
Defrost heater
(CN722)
Fuse (F62)
15 A 250 V
Fuse (F901)
T3.15AL250V
Smoothing
capacitor
(C63)
Smoothing
capacitor
(C62)
Smoothing
capacitor (C61)
Fuse (F61)
25 A 250V