14. Troubleshooting Guide
14.1 Self Diagnosis Function
•The display screen of wireless remote control unit and the
Refer to the table below to identify and solve the cause of the problem, and then
•If the problem is solved and operation returns to normal. LED 1 illuminates and others LED are off.
Diagnosis | Abnormality |
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or | LED | LED | LED | LED | LED | LED | Abnormality | Protection | Problem | Check location | ||
display | Protection | 6 | 5 | 4 | 3 | 2 | 1 | Judgment | Operation | |||
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| control |
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| Indoor fan only |
| • Indoor/outdoor | |
| Indoor/outdoor |
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| After | operation can | Indoor/outdoor | wire terminal | |
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| ○ | start by | • Indoor/outdoor | ||||
H11 | abnormal |
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| operation for | communication | ||||
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| entering into | PCB | ||||||
| communication |
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| 1 minute | force cooling | not establish | • Indoor/outdoor | |
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| operation |
| connection wire | |
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| Total indoor | • Indoor/outdoor | |
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| capability more | ||
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| connection wire | ||
| Indoor unit |
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| than maximum | ||
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| 90s after |
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| ○ |
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| limit or less than | ||||
H12 | capacity |
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| ― | PCB | ||||
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| power supply | minimum limit, or | ||||||
| unmatched |
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| number of | • Specification and | |
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| combination table | ||
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| indoor unit less | ||
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| in catalogue | ||
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| than two | ||
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| Compressor |
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| Continuous |
| Compressor | • Compressor | |
H15 | temperature |
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| ○ | ○ | ― | temperature | temperature | ||
sensor |
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| for 5s | sensor open or | sensor lead wire | |||||
| abnormality |
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| short circuit | and connector | |
| Outdoor |
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| Current |
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| current |
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| transformer | • Outdoor PCB | |
H16 | transformer |
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| ― | ― | faulty or | faulty or | |||
| (CT) |
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| compressor | compressor faulty | |
| abnormality |
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| faulty |
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| Outdoor air |
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| Continuous |
| Outdoor air | • Outdoor air | |
H27 | temperature |
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| ○ | ○ |
| ― | temperature | temperature | ||
sensor |
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| for 5s | sensor open or | sensor lead wire | |||||
| abnormality |
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| short circuit | and connector | |
| Outdoor heat |
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| Outdoor heat | • Outdoor heat | |
| exchanger |
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| ○ | ○ | ○ | Continuous |
| exchanger | exchanger | |
H28 | temperature |
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| ― | temperature | temperature | |||||
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| for 5s | |||||||||
| sensor 1 |
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| sensor 1 open or | sensor 1 lead wire | |
| abnormality |
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| short circuit | and connector | |
| Outdoor heat |
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| Outdoor heat | • Outdoor heat | |
| exchanger |
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| Continuous |
| exchanger | exchanger | |
H32 | temperature |
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| ― | temperature | temperature | |||
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| for 5s | |||||||
| sensor 2 |
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| sensor 2 open or | sensor 2 lead wire | |
| abnormality |
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| short circuit | and connector | |
| Indoor/outdoor |
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| ○ |
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| Indoor and | • Indoor and | |
H33 | misconnection |
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| ― | ― | outdoor rated | outdoor units | |||
| abnormality |
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| voltage different | check | |
| Outdoor gas |
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| Heating | Outdoor gas pipe | • Outdoor gas pipe | |
| pipe |
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| Continuous | ||||
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| temperature | temperature | ||||
H36 | temperature |
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| protection | ||||||
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| for 5s | sensor open or | sensor lead wire | ||||||
| sensor |
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| operation only | short circuit | and connector | |
| abnormality |
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| Outdoor liquid |
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| Outdoor liquid | • Outdoor liquid | |
| pipe |
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| Continuous | Cooling | |||
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| ○ |
| ○ | ○ | pipe temperature | pipe temperature | ||||
H37 | temperature |
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| protection | |||||||
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| for 5s | sensor open or | sensor lead wire | |||||||
| sensor |
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| operation only | short circuit | and connector | |
| abnormality |
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| Outdoor high |
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| Continuous |
| High pressure | • High pressure | |
H64 | pressure |
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| ○ | ○ |
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| ― | sensor open | sensor | ||
sensor |
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| for 1 minutes | circuit during | • Lead wire and | |||||
| abnormality |
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| compressor stop | connector | |
| Outdoor fan |
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| 2 times |
| Outdoor fan motor | • Outdoor fan motor | |
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| lead wire and | ||||
| motor |
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H97 |
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| happen within | ― | lock or feedback | connector | |||||
mechanism |
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| lock |
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| 30 minutes |
| abnormal | • Fan motor lock or | |
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| block | ||
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26
