Ceiling Cassette & High Static Ducted Indoor & Outdoor Units

Part 4 Trouble Shooting
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Only for training and service purposes
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Check Point
1. Check the power source.(230V ±15%)
2. Check the fan operation is right.
3. Check the current.
4. Check the install condition.
5. Check the CT Sensor Output signal
(LUU247HV - Check output the CT Sensor : DC 2.5±0.2V)
LUU367HV / LUU427HV - Check output pin 2.3 of the CT Sensor : DC 2.5±0.2V
IN/I
GND
<CT Sensing Check Point>
Black
Red
Vdc
<CT Sensing Check Point>< Inverter PCB>
1
2
3
Vdc
* AUUW18GD2[LUU187HV] / AUUW24GD2[LUU247HV]
* AUUW36GD2[LUU367HV] / AUUW42GD2[LUU427HV]