Trouble shooting 21 E41. 1
INDOOR UNIT Error Method:
Inlet air temp. Sensor Error
Indicate or Display:
Indoor Unit : Operation LED 4 times Flash, Timer LED 1 Times Flash,
Filter LED Continuous Flash.
Outdoor Unit : E.5 U.1
Error Code : 4 1
Detective Actuators:
Indoor Unit Controller PCB Circuit
Inlet air temp Sensor
Detective details:
When Inlet air temp. sensor open or shortage is detected
Forecast of Cause :
1. Connector defective connection 2. Sensor defective 3. Controller PCB defective
Check Point 2 : Remove connector and check Sensor resistance value
Sensor characteristics (Rough value)
If Thermistor is either open or shorted, replace it and reset the power.
Check Point 1 : Check connection of Connector
Check if connector is loose or removed
Check erroneous connection
Check if sensor cable is open
>>Reset Power when reinstalling due to removed connector or incorrect wiring.
6.5
35
8.0
30
10.012.515.820.225.933.6
3.032.772.502.221.941.661.391.15
3.683.483.27
2520151050
Temperature (
°C)
3.64.35.3
504540
OK
OK
Check Point 3 : Check voltage of Controller PCB (DC5.0V)
Corresponding connector
If the voltage does not appear, replace Controller PCB and set up the original address.
Cassette type
Duct type
Compact Wall mounted type
Wall mounted type
Floor / Ceiling type
Compact Floor type
CN8
Room temp. Sensor
(Black Wires)
Model Type
Resistance Value (k )
Temperature (°C)
DC
Voltage Value (V)
Voltage Value (V)
Resistance Value (k )
04-29
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