Trouble shooting 12 OUTDOOR UNIT Error Method:
Outdoor temp. sensor error
Indicate or Display:
Refer to error code table.
Detective Actuators:
Outdoor unit Main PCB Outdoor temperature thermistor
Detective details:
When Outdoor temperature thermistor open or
Forecast of Cause :
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
OK |
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Check Pointi t 2 :: Remove connector and check Thermistor resistance value |
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Thermistor Characteristics (Approx. value) |
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Temperature |
| 0°C | 5°C | 10°C |
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| (4.0°F) | (5°F) | (14°F) | (23°F) | (32°F) | (41°F) | (50°F) |
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Resistance Value (k | ) | 109.0 | 80.56 | 60.23 | 45.40 | 34.57 | 26.53 | 20.56 |
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Temperature |
| 15°C | 20°C | 25°C | 30°C | 35°C | 40°C | 45°C | 50°C | 55°C |
| (59°F) | (68°F) | (77°F) | (86°F) | (95°F) (104°F)(113°F) (122°F)(131°F) | |||||
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Resistance Value (k | ) | 16.04 | 12.26 | 10.00 | 7.978 | 6.408 | 5.184 | 4.216 | 3.451 | 2.841 |
If Thermistor is either open or shorted, replace it and reset the power. |
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OK |
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Check Poiintt 3 :: Check voltage of Main PCB (DC5.0V) |
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Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor (DC5.0V)
THERMISTOR |
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(PIPE) | BLACK |
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| BLACK |
| BLACK |
THERMISTOR | BLACK |
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(DISCHARGE) |
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THERMISTOR |
(OUTDOOR) |
BLACK |
BLACK |
11
22 CN71
33
44
11
22 CN70
33
If the voltage does not appear, replace Main PCB.
