Whenever power is applied, the relay switches ON (17-18) for the motor command, signalized by the LED "OUT" and appears on the display an indication of the value of the motor’s consumption intensity.
If the minimum intensity limit is reached by a period of time (tS), programmable by the user, the output relay (17-18) turns OFF and it indicates on the display, intermittently, the open command message “CO” and the remaining period of time (“t”) (hours) for the automatic re-start to happen. The re-start is made automatically after the programmed period of time is finished or if the start / stop command closes (8-9), signalized by the LED “COM”.
If the maximum intensity limit is exceeded through a period of time (Td) superior to 4 or 8 seconds, accordingly to the verified overcharge, the output relay (17-18) will turn OFF, indicating on the display the overcurrent error message “EIH”, and the alarm output (15-16) turns ON, being signalized by the LED “AL”. The automatic re-start may only be made manually, by pressing the reset key or by momentarily cutting the power supply.
If the operating period of time of the motor exceeds the maximum programmed limit, it will appear on the display, intermittently, the message "EOH", and the period of time occurred (minutes) and the current value. The alarm output (15-16) is activated.
When, in a 5 minute period it is verified an excessive amount of starts, the alarm output (15-16) is activated by 1 minute and will appear on the display, intermittently, the message "ESH", and the current value. This message is automatically disabled when the starting procedure is normalized.
When, in a 15 minute period of time, it is verified an excessive amount of starts, the output relay (17-18) will turn OFF, indicating on the display the error message for excessive number of starts “ESH”, and the alarm output (15-16) will be active. The relay’s rearm may only be made manually by pressing the reset key or by momentarily cutting the power supply.
The manual start may be forced, even if the start / stop command (8-9) is open, by pressing the “increase” key for 2 s.
The limit values for the tension are pre-defined in 195 V for the minimum tension and 245 V for the maximum tension. Exceeding these limits will not change the relays operation, causing this only to indicate an intermittent error message of low-tension “EUL” of high-tension “EUH”, respectively.