2. OTHER TROUBLES AND CAUSES
Auto vanes do not work. |
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| Auto vane motor does not work. |
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| Connector is poorly connected. |
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| Auto vane motor is poorly assembled. | ||
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| Indoor controller board is damaged. | ||
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Auto vane motor is damaged. Auto vane motor relay is damaged.
Unit stops after 5 to | Protection function is working. | Refer to check code on remote controller display. | |
20 seconds operation | |||
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Power ON/OFF button is not available.
Indoor/outdoor connecting wire is connected incorrectly.
Indoor/outdoor connecting wire shorts. Compressor protector is damaged. Defroster is broken.
Remote controller is damaged. Transmission wire is poorly connected
Transmission wire is damaged. Connector is poorly connected.
Check | Diagnosis of malfunction |
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| Check points |
code |
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1 | Abnormality of room temper- | 1) | Bad contact of thermistor | 1) | Check the thermistor. | |
| ature thermistor (RT1) | 2) | Damaged thermistor | 2) Measure the resistance of the thermistor. | ||
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| Normal resistance should be as follows. | |
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| 32°F····15kΩ | 86°F·····4.3kΩ |
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| 50°F······9.6kΩ 104°F·····3.0kΩ | |
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| 68°F······6.3kΩ |
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2 | Abnormality of indoor coil |
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| If the resistance is normal, replace the indoor | |||
| thermistor (RT2) |
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| controller board. | |
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4 | Abnormality of drain sensor | 1) Bad contact of transmission | 1) | Check the connector. | ||
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| wire | 2) | Measure the resistance of the thermistor | |
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| 2) | Damaged thermistor |
| (between ➃ - ➄of CN50). | |
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| As for the normal resistance, refer to the case | |
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| of 1. |
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| If the resistance is normal, replace the indoor con- | ||
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| troller board. |
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5 | Malfunction of drain pump | 1) | Malfunction of drain pump | 1) Check the drain pump. | ||
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| 2) | Damaged drain sensor | 2) ● Check the drain sensor. | ||
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| ● Check the drain sensor heater. Normal resis- | |
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| tance should be 82Ω . (between 1 - 3of | |
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| CN50). |
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| If the resistance is normal, replace the indoor con- | ||
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| troller board. |
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6 | Coil frost protection is work- | 1) | Short cycle of air cycle | 1) | Clear obstructions from the air cycle. | |
| ing. | 2) | Dirty air filter | 2) | Clean the air filter | |
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| 3) | Damaged fan | 3) | Check the fan. |
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| 4) Abnormal refrigerant | 4) | Check the refrigerant temperature. | ||
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8 | Abnormality in outdoor unit | 1) Wrong wiring of indoor/outdoor | 1) | Check the indoor/outdoor connecting wire. | ||
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| connecting wire | 2) | Change the connection of electric wiring. | |
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| 2) | Reversed phase | 3) | Check the protection device. | |
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| 3) | Protection device is working | 4) | Measure the resistance of the outdoor coil ther- | |
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| 4) Damaged outdoor coil thermis- |
| mistor. If the resistance is normal, replace the | ||
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| outdoor controller board. | |
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❈The number of check code shows times of Buzzer sound.
42
