Error Code | Abnormal point and detection method | Cause | Countermeasure | |
| Remote controller transmission |
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| error(E3)/signal receiving error(E5) | 2 remote controllers are set as | Set a remote controller to main, and the | |
| Abnormal if remote controller could not | “main.” | other to sub. | |
| find blank of transmission path for 6 sec- | (In case of 2 remote con- |
| |
| onds and could not transmit. | trollers) | Remote controller is connected with only one | |
| (Error code: E3) | Remote controller is connected | ||
| Remote controller receives transmitted | with 2 indoor units or more. | indoor unit. | |
| data at the same time, compares the | Repetition of refrigerant | The address changes to a separate setting. | |
| data, and when detecting it, judges | address | ~ Diagnose remote controller. | |
| different data to be abnormal 30 | Defective transmitting receiving | ||
E3 | continuous times. (Error code: E3) | a) When “RC OK” is displayed, remote con- | ||
circuit of remote controller | ||||
or |
| trollers have no problem. | ||
| Defective transmitting receiving | |||
Abnormal if indoor controller board could | Turn the power off, and on again to check. | |||
E5 | ||||
circuit of indoor controller board | ||||
| not find blank of transmission path. | When becoming abnormal again, replace | ||
| (Error code: E5) | Noise has entered into trans- | indoor controller board. | |
| Indoor controller board receives trans- | mission wire of remote control- | b) When “RC NG” is displayed, replace | |
| mitted data at the same time, compares | ler. | remote controller. | |
| the data,and when detecting it, judges |
| c) When “RC E3” or “ERC | |
| different data to be abnormal 30 |
| played, noise may be causing abnormal- | |
| continuous times. (Error code: E5) |
| ity. | |
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| Indoor/outdoor unit communication | Contact failure, short circuit or, | Check LED display on the outdoor control | |
| error (Signal receiving error) | miswiring (converse wiring) of | circuit board. (Connect | |
| Abnormal if indoor controller board | indoor/outdoor unit connecting | tool, | |
| cannot receive any signal normally for 6 | wire | Refer to | |
| minutes after turning the power on. | Check disconnection or looseness of indoor/ | ||
| Defective transmitting receiving | |||
| Abnormal if indoor controller board | outdoor unit connecting wire of indoor unit or | ||
| circuit of outdoor controller | |||
| cannot receive any signal normally for 3 | outdoor unit. | ||
| circuit board. | |||
| minutes. | Check all the units in case of twin indoor | ||
E6 | Consider the unit as abnormal under | Defective transmitting receiving | unit system. | |
the following condition: When 2 or more | circuit of indoor controller board | - Turn the power off, and on again to check. | ||
| indoor units are connected to an | Noise has entered into indoor/ | If abnormality generates again, replace | |
| outdoor unit, indoor controller board | outdoor unit connecting wire. | indoor controller board or outdoor | |
| cannot receive a signal for 3 minutes | controller circuit board. | ||
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| from outdoor controller circuit board, a |
| Other indoor controller board may have | |
| signal which allows outdoor controller |
| defect in case of twin indoor unit system. | |
| circuit board to transmit signals. |
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| Indoor/outdoor unit communication | Defective transmitting receiving | - Turn the power off, and on again to check. | |
| error (Transmitting error) | circuit of indoor controller board. | If abnormality generates again, replace | |
| Abnormal if indoor controller board | Noise has entered into power | indoor controller board. | |
E7 | receives “1” 30 times continuously when | supply. |
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indoor controller board transmits “0” signal. | Noise has entered into outdoor |
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| control wire. |
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| Indoor controller board | Defective indoor controller | Replace indoor controller board. | |
| Abnormal if data cannot be read normally | board |
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Fb | from the nonvolatile memory of the indoor |
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controller board. |
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| Remote controller control board | Defective remote controller | Replace remote controller. | |
| Abnormal if data cannot be read nor- |
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| mally from the nonvolatile memory of the |
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| remote controller control board. |
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| (Error code: E1) |
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E1 | Abnormal if the clock function of remote |
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or |
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controller cannot be operated normally. |
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E2 |
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(Error code: E2) |
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