(ECOi-Geräte)
1. Error Detection Method
It is judged an error if the computer detects an error signal from the HIC.
An error signal is issued by the HIC if abnormal heat occurs inside the HIC or if there is an overcurrent.
However, it is judged an error in the same way if the signal line from the HIC is not connected properly or opened.
2. Error Diagnosis
| 1 Wiring between HIC & outdoor control PC board |
1-1 | The wiring (power cord and signal line) between the HIC and the outdoor CR board is connected properly. | Yes | 1-2 | |
| No | Correct the wiring (connector) | ||||
| 1-2 | Everything is normal in the wiring (power cord & signal line) between the HIC and the outdoor CR board. Check the wiring one by one with a tester if there is opened and grounding. | Yes | 3-1: Single-phase model 2-1: 3-phase model |
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| No | Replace wiring | ||||
| 2 Check the outdoor unit CR PC board |
2-1 | The connector CN-PRY1 on the CR PC board is connected properly (locked). | Yes | 3-1 | |
| No | Correct the wiring (connector) | ||||
| 3 HIC poor radiation |
3-1 | The heat dissipating surface on the back of the HIC is in good contact with the heat sink (heat dissipating fins) of the electrical box. Check for looseness in the fastening screws and the condition of the heat-conducting putty. | Yes | 3-2 | |
| No | Tighten screw(s), add putty | ||||
| 3-2 | A good flow of cooling air passes through the heat sink (heat dissipating fins) of the electrical box. Check for debris blocking the fins. | Yes | 4-1 | ||
| No | Remove foreign matter | ||||
| 4 HIC overcurrent |
4-1 | The results of the pass/fail tests for the following HIC board IPM show it to be outside the range of the resistance of a conforming part. | Yes | Replace the HIC PC board | |
| No | 4-2 | ||||
| 4-2 | The inverter compressor was stopped/started more than 10 times and it triggered H31 at a high rate. If alarm code P16 occurs at times, refer to the alarm code P16. | Yes | Replace the HIC PC board | ||
| No | Refer to alarm code P16 | ||||
• HIC board IPM Pass/Fail Tests
✭ Conforming part resistance value (measure with an analog tester)
| Tester terminals |
||||||||
| + | P | NU | ||||||
| - | U | V | W | NU | U | V | W | P |
| Resistance value (ohm) |
1 k to 5 k | 1 k to 5 k | 1 k to 5 k | 5 k to 10 k | 100 k to ∞ | 100 k to ∞ | 100 k to ∞ | 100 k to ∞ |
| Tester terminals |
||||||||
| - | P | NU | ||||||
| + | U | V | W | U | V | W | ||
| Resistance value (ohm) |
100 k to ∞ | 100 k to ∞ | 100 k to ∞ | 1 k to 5 k | 1 k to 5 k | 1 k to 5 k | ||
Excepting the parts of “100 k to ∞”, it is acceptable if a small resistance value appears as a reference value unless the value is “0 = short-circuit”.