71
Back side of unit
-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
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(
:
)
Fin temperature thermistor(RT64)
Resistance(k
"
)
Resistance(k
"
)
Resistance(k
"
)
Output to drive
outdoor fan motor
(CN932)
Fin temperature
thermistor/R
T64 (CN662)
Ambient temperature
thermistor /R
T65 (CN663)
Discharge temperature
thermistor/R
T62 (CN661)
Defrost thermistor/R
T61 (CN661)
230V AC
Input
Front side of unit
325V DC
8V DC
5V
Output to
drive
compressor
(LDW,
LDV,
LDU)
JK,JGO
1. Inverter P.C. board
MXZ-2A40VA
MXZ-2A52VA
13-7. Test point diagram and voltage
5V DC 12V DC
FUSE(F801)
3.15V/250V
FUSE(F901)
3.15V/250V
To
interface
P.C.board
LEV A
(CN791)
LEV B
(CN792)
GND
5V DC
pulse wave
To fan motor
(
Outdoor heat
exchanger temperature
thermistor /R
T68 (CN661)
(
GND
12V
Primary current
R.V
.coil
X64
Zero cross
T
o display P
.C.board
OB377--3.qxp 05.12.14 3:34 PM Page 71
