Troubleshooting the E-4A Cabinet Control Enclosure Overheating

Overview

This error occurs when the temperature of the cabinet control enclosure is greater than 158°F (70°C). This temperature is measured by an internal temperature sensor that is part of the I/O board assembly in the top of the unit.

Note: Image is a bird's eye view from the top, with the cover removed.

Field Troubleshooting

Note: you can view the ambient temperature of the control enclosure by navigating to Home/Settings/Temperature Display (swipe left 10 times). The Ambient Temperature is located in the upper left corner of this display.

To avoid electrical shock or property damage, disconnect power before installing or servicing equipment. A qualified technician must perform the service procedures.

1. Unplug main power to unit and turn main power switch to off position.

2. Remove the top cover of the unit to gain access to the electrical components.

3. Visually inspect that both cooling fans are clean from dust and debris.

4. Reconnect power, and then turn on the unit (fans run after the unit is powered on for 30 seconds).

5. Verify both fans are running.

   • If fans are clean and running, skip to step 6.

   • If the fan(s) are NOT running, ensure 12VDC is supplied to the fan. If voltage is present, replace fan.

6. Measure the ambient temperature near the I/O board. If this temperature is lower than 100F (38C), replace the I/O board.