How to determine if the ISW-EN5040 or EN5040-T is indicating AC Loss or Low Battery.

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EN5040-T or ISW-EN5040-T LED Indications:

• RECEIVE- Flashes when the EN5040-T or ISW-EN5040-T receives any recognizable RF transmission.
• TRANSMIT- Lit steady when the EN5040-T or ISW-EN5040-T transmits an RF transmission.
• LOW BATT- Lit steady when the EN5040-T or ISW-EN5040-T has a low battery.
• POWER- Lit steady Green when the EN5040-T or ISW-EN5040-T receives AC input power. Lit steady Red when receiving back-up battery power.

The Power LED will light steady Red when running on back-up battery due to the loss of AC input power.

 The EN5040-T or ISW-EN5040-T will send RF Low Battery signal to the ISW-D8125CW-V2 for any of the following conditions:

1. Re-transmitting the RF Low Battery signal from a wireless transmitter.
2. Low internal back-up battery in the EN5040-T or ISW-EN5040-T
3. Loss of AC input to the EN5040-T or ISW-EN5040-T

The Power LED indicates power input to the EN5040-T or ISW-EN5040-T:

• Solid Green: AC is available.
• Solid Red: AC Loss; running on back-up Battery.