Service manual

-20 -10 0 10 20 30 40
0
10
20
30
40
50
60
70
80
90
100
Temperature(:)
Temperature(:)
Discharge temperature thermistor (RT61)
0 102030405060708090100110120
0
100
200
300
400
500
600
700
0 1020304050607080
0
20
40
60
80
100
120
140
160
180
200
Temperature(:)
Resistance (k")
Resistance (k")
Resistance (k")
Defrost temperature thermistor (RT62)
Evaporation temperature thermistor (RT63)
Gas pipe temperature thermistor (RT6A,6B)
High-pressure protection thermistor (RT68)
Fin temperature thermistor (RT65)
127
MXZ-A18WV -
Outdoor Electronic control P.C. board
E1
230V AC 50Hz Input
( (
Gas pipe temperature A thermistor (RT6A) Gas pipe temperature B thermistor (RT6B)
(
CN 661
( ( (
Defrost temperature thermistor (RT62) Discharge temperature thermistor (RT61) Evaporation temperature thermistor (RT63)
(
High-pressure protect thermistor (RT68)
CN 662
)
(
CN663 Fin temperature thermistor (RT65)
CN721 Room A Linear expansion valve (LEV) 12V DC pulse wave
Rush current relay (–)
Outdoor fan “High” (–) Outdoor fan “Low” (–) R.V. coil (–) Common (+)
)
CN851 12V DC
(
Common (+)
(
Common (–)
(
CN722 Room B Linear expansion valve (LEV) 12V DC pulse wave
(
Common (+)
(
Common (–)
(
LED 2
CN601 5 ~ 10V DC Serial signal Room A
LED 1
(
CN602 5 ~ 10V DC Serial signal Room B
(
OB307A5.qxp 03.2.19 4:14 PM Page 127