Fujitsu AO*24LMAKL, Service Instruction

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Trouble shooting 8
INDOOR UNIT
OUTDOOR UNIT Error Method:
Indicate or Display:
Indoor Unit : No LED
Outdoor Unit : LED 2 times blink
ERROR CODE : E : 0C
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 2 :
Check Point 3 :
18.1 26.9
20°C
41.1 64.5 81.8 105 135 176 Resistance Value (k )
15°C 10°C 5°C 0°C
Temperature
OK OK
OK OK
12.5
30°C 50°C 40°C 60°C
0.51
180°C
0.77
160°C
1.21 1.98 3.43 4.61 6.31 8.78 Resistance Value (k )
140°C 120°C 100°C 90°C 80°C 70°C
Temperature
TH
ER
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
E
R
M
IS
TO
R
(C
O
M
P
R
E
S
S
O
R
)
TH
E
R
M
IS
TO
R
(H
E
A
T
S
IN
K
)
B
R
O
W
N
B
LA
C
K
B
LA
C
K
B
LU
E
B
R
O
W
N
CN21 CN22 CN23 CN26 CN25
1 2 1 2 1 2 1 2 1 2
Outdoor Discharge Pipe Temperature
Sensor Error
Outdoor Unit Main PCB Circuit
Discharge Pipe Temperature Thermistor
When Discharge Pipe 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.
07-11