Error mode detected by remote controller or central controller
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| Operation of diagnostic function |
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| Judgment and measures |
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| Check code |
| Cause of operation |
| Status of | Condition |
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| air conditioner |
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| Power supply error of remote controller, Indoor | |
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| EEPROM error | |
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| 1. | Check remote controller |
| Not displayed at all | No communication with master indoor unit |
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| 2. | Check remote controller. | ||||||||||||||
| • | Remote controller wiring is not correct. |
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| (Operation on |
| Stop | — | 3. | Check indoor power wiring. | |||||||||||||||
| remote controller | • | Power of indoor unit is not turned on. |
| 4. | Check indoor P.C. board. | |||||||||||||||
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| is impossible.) | • Automatic address cannot be completed. |
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| 5. | Check indoor EEPROM. | ||||||||||||||
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| (including socket insertion) |
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| → Automatic address repeating phenom- |
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| enon generates. |
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| No communication with master indoor unit |
| Stop |
| Receiving error from remote controller | ||
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| 1. | Check remote controller | |||
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| E01 | • | Disconnection of |
| (Automatic reset) | Displayed when | ||||||||||
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| 2. | Check remote controller. | |||||||||||||
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| ∗ 2 |
| remote controller and master indoor unit | ∗ | If center exists, | error is detected | ||||||||||
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| 3. | Check indoor power wiring. | |||||||||||||
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| (Detected by remote controller side) |
| operation continues. |
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| 4. | Check indoor P.C. board. |
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| Stop |
| Sending error of remote controller | |
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| E02 | Signal send error to indoor unit |
| (Automatic reset) | Displayed when | 1. Check sending circuit inside of remote | ||||||||||
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| (Detected by remote controller side) | If center exists, | error is detected |
| controller. | |||||||||||
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| operation continues. |
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| → Replace remote controller. |
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| Stop |
| 1. | In |
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| E09 | There are multiple main remote controllers. |
| Displayed when |
| there are multiple main units. | ||||||||||
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| (Detected by remote controller side) |
| (Sub unit | error is detected |
| Check that there are 1 main remote | ||||||||||
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| continues operation.) |
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| controller and other sub remote controllers. | |
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| L20 | Duplicated indoor central addresses on |
| Stop | Displayed when | 1. | Check setting of central control system | |||||||||
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| network address. (Network adapter SW01) | ||||
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| Central controller | communication of central control system |
| (Automatic reset) | error is detected | 2. | Check network adapter P.C. board. | ||||||||||||||
| (Detected by indoor/central controller side) |
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| L20 |
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| — |
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| 1. | Check communication wire / miswiring | ||||||||
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| ∗ 3 |
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| 2. | Check communication (U3, U4 terminals) | ||||||||
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| Communication circuit error of central |
| Continues | Displayed when | 3. | Check network adapter P.C. board. | |
| Central controller |
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| control system |
| 4. Check central controller (such as central | ||||||||||||||||||
| (By remote controller) | error is detected | |||||||||||||||||||
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| (Send) | ||||||||||||||||
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| (Detected by central controller side) |
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| control remote controller, etc.) | |||||||||||
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| C05 |
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| 5. | Check terminal resistance. | |||||||||
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| (Receive) |
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| C06 |
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| — | Indoor Gr sub unit error |
| Continuation/Stop | Displayed when | Check the check code of the corresponding | ||||||||||
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| (According | |||||
| Central controller | (Detected by central controller side) |
| error is detected | unit from remote controller. | ||||||||||||||||
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| to each case) | |||||||||||||||||||
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| P30 |
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∗2 The check code cannot be displayed by the wired remote controller. (Usual operation of air conditioner becomes unavailable.)
For the wireless models, an error is notified with indication lamp.
∗3 This trouble is related to communication of remote controller (A, B), central system