Troubleshooting
Disconnect Messages
Disconnect screens explain the reason that the inverter rejected an AC source. The unit returns to inverting mode (if turned on). The ERROR LED (see page 11) will not illuminate for a disconnect message, although it may flash for a concurrent warning following the disconnect. (See previous section.) If the AC source is removed, the warning and the LED will be blank, but the cause of the last disconnect will remain. See the system display manual for instructions on viewing disconnect messages. One or more messages in this menu will display yes in the MATE system display; Y in the MATE3. If a message says no (or N), it is not the cause of the disconnection.
Disconnect screens only display the reason for the disconnection; they cannot correct it. It is usually the result of external conditions, not an inverter fault. A few settings can be changed to accommodate problems with the AC source.
Disconnect messages are not the same as the Stop Sell Reasons (see next page), although they may be caused by the same circumstances. A
Table 7 Disconnect Troubleshooting
Message | Definition | Possible Remedy |
|
|
|
acin freq too high | The unit disconnects if the AC source | Check AC source. If it is a generator, |
| exceeds 55 Hz. | reduce speed. |
|
|
|
acin freq too low | The unit disconnects if the AC source | Check AC source. If it is a generator, |
| drops below 45 Hz. | increase speed. |
|
|
|
acin voltage > max | The unit disconnects if the AC source | Check AC source. The inverter’s |
| exceeds 252 Vac (default value). | acceptance range is adjustable. However, |
|
| this will accommodate an AC problem, not |
|
| fix it. |
|
|
|
acin voltage < min | The unit disconnects if the AC source | Check AC source. The inverter’s |
| drops below 208 Vac (default value). | acceptance range is adjustable. However, |
|
| this will accommodate an AC problem, not |
|
| fix it. |
|
|
|
39 |
