Trouble shooting 18-2
OUTDOOR UNIT Error Method:
Detective Actuators:
Detective details:
Forecast of Cause :
4.77
77°F
5.98
68°C
7.56Resistance Value (k )
59°F14°FTemperature(°F)
3.84
86°F
Heat Ex. MID Thermistor Error
Outdoor Unit Main PCB Circuit
Heat Exchanger Temperature Thermistor
When Heat Exchanger 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 miss-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.
OK
OK
23°F 32°F 41°F 50°F
27.8 21.0 16.1 12.4 9.63
Indicate or Display:
Outdoor Unit : LED 1 : 16 time Flash
Indoor Unit : Operation lamp: 7 time Flash, Timer lamp: 3 time Flash
Economy lamp: Continuous flash.
ERROR CODE : [E : 73]
Check Point3: Check voltage of Main PCB (DC5.0V)
Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor (DC5.0V)
02-23
THERMISTOR
(DISCHARGE)
BROWN
BROWN
1
2
1
2
THERMISTOR
(COMPRESSOR)
1
2
BLUE
BLACK
BLACK
THERMISTOR
(HEAT SINK)
THERMISTOR
(OUTDOOR)
THERMISTOR
(PIPE)
1
2
1
2
CN25
CN26
CN23
CN22
CN21
BLACK
1
2
BLACK
THERMISTOR
(PIPE MID)
CN24
WHITE
GREEN
BLUE
RED
YELLOW
If the voltage does not appear, replace Main PCB.
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