Sensor Characteristics (Rough value)
If Thermistor is either open or shorted, replace it and reset the power.
Trouble shooting 22 E42. 1
INDOOR UNIT Error Method:
Indoor unit Heat Ex. inlet temp.
sensor Error
Indicate or Display:
Indoor Unit : Operation LED 4 times Flash, Timer LED 2 Times Flash,
Filter LED Continuous Flash.
Outdoor Unit : E.5 U.1
Error Code : 4 2
Detective Actuators:
Indoor Unit Controller PCB Circuit
Heat Exchanger Inlet temp. Sensor
Detective details:
When open or shorted Heat Exchanger Inlet temp. sensor is detected
Forecast of Cause :
1. Connector defective connection 2. Sensor defective 3. Controller PCB defective
Check Point 1 : Check connection of Connector
Check if connector is loose or removed
Check erroneous connection
Check if thermistor cable is open
>>Reset Power when reinstalling due to removed connector or incorrect wiring.
OK
OK
Check Point 2 : Remove connector and check sensor resistance value
Check Point 3 : Check voltage of Controller PCB (DC5.0V)
Corresponding connector
Heat Ex Inlet temp. Sensor
(Black Wires)
Model Type
32.4
35
40.0
30
49.862.579.1100.9129.8168.6
3.032.772.502.221.931.651.391.14
2520151050
Temperature (
°C)
17.821.626.3
3.693.493.27
504540
Temperature (°C)
DC
Voltage Value (V)
Resistance Value (k )
Voltage Value (V)
Resistance Value (k )
04-30
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
CN5 or CN9
CN9
CN5 or CN20
CN5 or CN9
CN9
CN5
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