Error Code | Abnormal point and detection method | Cause | Countermeasure |
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| Freezing/overheating protection is | (Cooling or drying mode) | (Cooling or drying mode) |
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| working | 1 Clogged filter (reduced airflow) | 1 Check clogs of the filter. |
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| 1 Freezing protection (Cooling mode) | 2 Short cycle of air path | 2 Remove shields. |
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| The unit is in | 3 |
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| mode if pipe <liquid or condenser/evap- | operation out of the tolerance |
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| orator> temperature stays under | range |
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| 4 Defective indoor fan motor | 4 Measure the resistance of fan motor's winding. | ||
| the compressor started. Abnormal if it | • Fan motor is defective. | Measure the output voltage of fan's connector | |
| stays under | • Indoor controller board is | (FAN) on the indoor controller board. |
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| again within 16 minutes after | defective. | WThe indoor controller board should be |
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| resume prevention mode. |
| normal when voltage of AC 208/230V is |
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| detected while fan motor is connected. |
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| Refer to |
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| 5 Defective outdoor fan control | 5 Check outdoor fan motor. |
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| 6 Overcharge of refrigerant | 67 Check operating condition of refrigerant | |
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| 7 Defective refrigerant circuit | circuit. |
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| (clogs) |
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P6 | 2 Overheating protection (Heating mode) | (Heating mode) | (Heating mode) |
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| 1 Clogged filter (reduced airflow) | 1 Check clogs of the filter. |
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| The units is in | 2 Short cycle of air path | 2 Remove shields. |
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| prevention mode if pipe <condenser / | 3 Overload (high temperature) |
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| evaporator> temperature is detected as | operation beyond the tolerance |
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| over 70:(158˚F) after the compressor | range |
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| started. Abnormal if the temperature of | 4 Defective indoor fan motor | 4 Measure the resistance of fan motor's winding. | |
| over 70:(158˚F) is detected again with- | • Fan motor is defective. | Measure the output voltage of fan's connector | |
| in 10 minutes after | • Indoor controller board is | (FAN) on the indoor controller board. |
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| prevention mode. | defective. | WThe indoor controller board should be |
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| normal when voltage of AC 208/230V is |
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| detected while fan motor is connected. |
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| Refer to |
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| 5 Defective outdoor fan control | 5 Check outdoor fan motor. |
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| 6 Overcharge of refrigerant | 6~8Check operating condition of refrigerant | |
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| 7 Defective refrigerant circuit | circuit. |
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| (clogs) |
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| 8 Bypass circuit of outdoor unit |
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| is defective. |
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| Pipe temperature | 1 Slight temperature difference | 1~4 Check pipe <liquid or condenser / |
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| <Cooling mode> | between indoor room | evaporator> temperature with room |
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| Detected as abnormal when the pipe tem- | temperature and pipe <liquid | temperature display on remote controller | |
| perature is not in the cooling range 3 min- | or condenser / evaporator> | and outdoor controller circuit board. |
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| utes after compressor start and 6 minutes | temperature thermistor | Pipe <liquid or condenser / evaporator> |
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| after the liquid or condenser/evaporator pipe | • Shortage of refrigerant | temperature display is indicated by setting | |
| is out of cooling range. | • Disconnected holder of pipe | SW2 of outdoor controller circuit board as | |
| Note 1) It takes at least 9 minutes to | <liquid or condenser / | follows. |
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| detect. | evaporator> thermistor |
| ) |
| Note 2) Abnormality P8 is not detected in | • Defective refrigerant circuit | Conduct temperature check with outdoor | |
| drying mode. | 2 Converse connection of | ||
| controller circuit board after connecting | |||
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| Cooling | extension pipe (on plural units | ||
| TH: Lower temperature between liquid pipe | connection) |
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| temperature (TH2) and | 3 Converse wiring of indoor/ | 23Check converse connection of extension | |
| condenser/evaporator temperature | outdoor unit connecting wire | pipe or converse wiring of indoor/outdoor | |
| (TH5) | (on plural units connection) | ||
| unit connecting wire. |
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P8 | TH1: Intake temperature | 4 Defective detection of indoor |
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| <Heating mode> | room temperature and pipe |
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| When 10 seconds have passed after the | <condenser / evaporator> |
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| compressor starts operation and the hot | temperature thermistor |
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| adjustment mode has finished, the unit is | 5 Stop valve is not opened |
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| detected as abnormal when | completely. |
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| condenser/evaporator pipe temperature is |
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| not in heating range within 20 minutes. |
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| Note 3) It takes at least 27 minutes to |
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| detect abnormality. |
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| Note 4) It excludes the period of defrosting |
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| (Detection restarts when defrosting |
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| mode is over) |
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| Heating range:3 deg C[5.4deg |
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