Trouble shooting 19
OUTDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 2 :
Check Point 3 :
OK
OK
OK
OK
Heat Sink Temperature
Thermistor Error
Outdoor Unit Main PCB Circuit
Heat Sink Temperature Thermistor
When Heat Sink Temperature Thermistor open or short-circuit is
detected at power ON or while running the compressor.
1. Connector connection failure 2.Thermistor failure 3. Main PCB failure
Check Point 1 : Check connection of Connector
Check if connector is removed.
Check erroneous connection.
Check if thermistor cable is open.
>>Upon correcting the removed connector or mis-wiring, reset the power.
Check Point 2 : Remove connector and check Thermistor resistance value
Thermistor Characteristics (Approx. value)
If Thermistor is either open or shorted, replace it and reset the power.
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor (DC5.0V)
If the voltage does not appear, replace Main PCB.
02-29
TH
E
R
M
IS
TO
R
(D
IS
C
H
A
R
G
E
)
TH
E
R
M
IS
TO
R
(P
IP
E
)
TH
E
R
M
IS
TO
R
(O
U
TD
O
O
R
)
TH
ER
M
IS
TO
R
(H
EA
T
SI
N
K
)
B
R
O
W
N
B
LA
C
K
B
LA
C
K
B
LU
E
CN25
CN23 CN22 CN21
1 2
1 2
1 2
1 2
Refer to error code table.
30°C
6.10
9.73
12.4
16.1
Resistance
Value (k )
20°C
7.67
15°C
10°C
5°C
0°C
Temperature
1.79
1.25
0.89
Resistance
Value (k )
50°C
60°C
70°C
0.65
80°C
0.48
90°C
0.36
100°C
0.21
12.3
8.69
6.27
4.60
3.43
2.00
120°C
2.62
3.95
62.5
101
130
169
79.1
17.8
26.3
40.0
40°C
Temperature
AO*18L/ 24L
AO*30L
AO*18L/ 24L
AO*30L
