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| FILE NO. | ||
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| Table |
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| Diagnosis/Process flowchart |
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| Item |
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| Contents |
| Summary |
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| Preparation | Turn “OFF” the power |
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| Remove |
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| breaker, and remove 3P |
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| connector of |
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| compressor. |
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| connector which connects |
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| inverter and compressor. |
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| NG |
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| Check | • | Check whether 25 A fuse | If fuse was blown, |
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| Check 25 A fuse |
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| on the control board | be sure to check the | |||||||
| (Part No.F01). |
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| assembly is blown or not. | electrolytic capacitor | ||||
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| OK |
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| (F01) | and diode block. (DB01) | |||
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| Replace fuse. |
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| Check |
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| • | Connect discharge | |||||||
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| resistance (approx. | |
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| Check |
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| 100Ω 40W) or soldering | ||
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| iron (plug) between +, – | |||
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| electrolytic |
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| terminals of the electrolytic | ||
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| capacitor, |
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| capacitor (500∝F) |
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| diode block |
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| (DB01), etc. |
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| of C14 (with printed | |||
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| CAUTION HIGH VOLT- | |
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| AGE) on P.C. board. | |
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| Discharging position | Plug of |
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| Check |
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| (Discharging period | soldering | |
| terminal voltage |
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| NG |
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| 10 seconds or more) | iron | |||
| of electrolytic |
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| capacitor. |
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| Check |
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| OK |
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| electrolytic |
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| capacitor, |
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| diode |
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| (DB01), etc. |
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| Operation | Turn on power breaker, and |
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| Does outdoor |
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| NO |
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| operate the air conditioner in |
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| COOL mode by |
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| fan rotate? |
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| of the timer. |
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| YES |
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| Measurement | Measure terminal voltage of |
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| Does LED on control | YES |
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| electrolytic capacity. |
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| OK if 500∝F → |
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| board flash or go on? |
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| 500∝F: 400WV x 3 |
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| NO |
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| DC280 to 380 V |
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| Check |
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| After operation, turn off the | Remove CN300 by pushing | ||||||
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| Remove connector |
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| power breaker after 2 | the part an arrow because | |||||||||||
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| CN300 of outdoor |
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| Stop | minutes 20 seconds passed, | CN01 is a connector with | |||||||||||
| NG fan motor, and using |
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| and discharge the electrolytic | lock. |
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| a tester, check |
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| resistance value |
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| capacity by soldering iron. |
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| between every phase |
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| Check voltage between |
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| at motor side |
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| motor phases. |
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| OK |
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| Check | • | Is not winding |
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| Measurement |
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| outdoor |
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| • |
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| Is not frame grounded with |
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| fan motor. |
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| 1, 2 or 3? | → | Resistance between | ||
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| C |
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| phases should be approx. | |||||||
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| 55 to 77Ω . |
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| → | Should be 10MΩ | or |
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| more. |
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– 72 –