Outdoor Thermistor Error
OK
DC
CN144
(O
U
T
TE
M
P.
)
TH
ER
M
IS
TO
R
1 2 3
1 2 3
B
LA
C
K
B
LA
C
K
Outdoor temperature thermistor
Outdoor temperature thermistor short or open detected
1. Connector connection defective, open
2. Thermistor failure
3. Main PCB failure
OK
Check Point 1 : Check the connector connection and cable open
Connector connection state check
Cable open check
Check Point 2: Check the thermistor
Thermistor characteristics check (Disconnect the thermistor from the PCB and check.)
* For the thermistor characteristics, refer to the "Service Parts Information
8".
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Main PCB (CN144:1-3)
voltage value = 5V
Remove the thermistor from Main PCB, check the voltage.
Outdoor temperature thermistor (CN144:1-3)
If the voltage do not appear, replace Main PCB
, and execute
the check operation again.
If the voltage do not appear, replace Main PCB
02-33
Trouble shooting 28
Detective Actuators:
Detective details:
OUTDOOR UNIT Error Method:
Forecast of Cause :
Outdoor unit :
POWER
MODE
ERROR
2
7
(L1)
(L2)
(L6)
(L5)
(L4)
(L3)
4
PUMP
DOWN
LOW
NOISE
PEAK
CUT
Indicate or Display:
Economy lamp : Continuous flash.
ERROR CODE : [E : 74]
Indoor Unit : Operation lamp: 7 time Flash,
Timer lamp: 4 time Flash
