No. | Symptom | LED indication | Abnormal point/ | Condition | Correspondence | ||
Condition | |||||||
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| Outdoor unit | Low discharge tem- | Temperature of discharge temperature thermistor has been | •Refer to | "Check of LEV". | ||
18 | operates. | 2.5 seconds OFF | perature protection | 122 °F (50 °C) or less for 20 minutes. | •Check refrigerant circuit and refrig- | ||
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| erant amount. |
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| PAM protection PAM: | The overcurrent flows into IGBT (Insulated Gate Bipolar tran- | This is not malfunction. PAM protec- | |||
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| 2.5 seconds OFF | Pulse Amplitude | sistor : TR821) or when the | tion will be activated in the following | ||
19 |
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| Modulation | more, PAM stops and restarts. | cases; |
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| 1 Instantaneous power voltage drop | |||
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| (Short time power failure) | ||
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| 2 When the power supply voltage is | ||
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| high. |
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| Inverter check mode | The connector of compressor is disconnected, inverter check | •Check if the connector of the com- | |||
20 |
| 2.5 seconds OFF |
| mode starts. | pressor is correctly connected. | ||
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| Refer to | "How to check | ||
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| inverter/ compressor". | ||
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