2. Indoor unit failure mode table
Left lamp of OPERATION | Abnormal point | Condition |
| Correspondence | |
INDICATOR lamp | (Failure mode) |
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Not lighted | Normal | — |
| — | |
Room temperature | The room temperature thermistor short or | Refer to the characteristics of the room temperature | |||
open circuit is detected every 8 seconds dur- | |||||
thermistor | ing operation. | thermistor | |||
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Indoor coil | The indoor coil thermistor short or open circuit | Refer to the characteristics of the main indoor coil ther- | |||
thermistor | is detected every 8 seconds during operation. | mistor, the sub indoor coil thermistor | |||
Serial signal | The serial signal from outdoor unit is not re- | Refer to | "How to check miswiring and serial | ||
ceived for a maximum of 6 minutes. | signal error". |
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| The rotational frequency feedback signal is |
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Indoor fan motor | not emit during the 12 seconds the indoor fan | Refer to | "Check of indoor fan motor". | ||
| operation. |
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Indoor control | It cannot properly read data in the nonvolatile |
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memory of the indoor electronic control P.C. | Replace the indoor electronic control P.C. board. | ||||
system | |||||
board. |
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NOTE : Blinking patterns of this mode differ from the ones of TROUBLESHOOTING CHECK TABLE
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