Trouble shooting 9
OUTDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators: Detective details:
Forecast of Cause :
OKOK
OKOK
Heat sink thermistor (inverter) error
Outdoor unit Inverter PCB
Heat sink temperature thermistor (INV)
When Heat sink temperature thermistor (INV) open or
short-circuit is detected at power ON or while running the compressor.
1. Connector connection failure 2. Thermistor failure 3. Inverter PCB failure
Check Point 1 : Check connection of connector
Check if connector is removed.
Check if connector is 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 Inverter 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 Inverter PCB.
02-11
Refer to error code table.
94.3 49.6 27.4 15.8 9.5 5.9 3.8 2.5
1.7 1.2 0.8 0.6 0.4
-30 -20 -10 0 10 20 30 40
50 60 70 80 90
Temperature (°C )
Resistance value (k )
Temperature (°C )
Resistance value (k )
CN800
THERMISTOR
( HEATSINK INV. TEMP.)
1 2
1 2
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