Service Manual

28
OCH699
Inverter P.C. board
SUZ-KA09NA(H)2.MX SUZ-KA12NA(H)2.MX SUZ-KA15NA(H)2.MX
10-6. 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
208/230 VAC
Smoothing
capacitor (C62)
Output to
drive
compressor
(LDU,
LDV,
LDW)
(+)(-)
Fuse (F701)
T3.15AL250V
Smoothing
capacitor (C61)
Fuse (F901)
T3.15AL250V
R.V.coil
(CN721)
208/230 VAC
Jumper wire for
changing defrost
setting (JS)
Signal of outdoor fan motor (CN931)
208/230 VAC
Outdoor heat exchanger temperature thermistor /RT68 (CN644)
Jumper wire for pre-
heat control setting
(JK)
Heater connector
(CN722)
(SUZ-KA09/
12/15NAH2)
Fuse (F801)
T3.15AL250V
Back side of unit
LEV connector (CN724)
Output to
drive outdoor
fan motor
(CN932)
LED
-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)
Resistance(kΩ)
Resistance(kΩ)
Temperature (°F)
Discharge temperature thermistor (RT62)
Resistance (kΩ)
0
100
200
300
400
500
600
700
800
32 50 68 86 104 122 140 158 176 194 212 230 248
Smoothing
capacitor (C63)