AES Battery Chamber Alarm Guide

AES’ SAFE battery chambers have a number of different alarms in place to ensure chamber safety and efficiency. If your chamber is in an alarm state, you can view which specific alarm is being triggered by tapping the arrow at the top of the controller screen and clicking on the Alarms tab. You can also view the Alarm message on the chamber’s AESONE CONNECT® dashboard. A list of potential alarm messages, what they indicate, and how they can be resolved are listed below.

Circ Fault

Indicates that the chamber’s circulation fan has stopped running, this can usually be resolved by resetting the fan’s breaker switch but if that doesn’t resolve the issue the fan motor has most likely failed and needs to be replaced.

Temp Safety

Traces back to the chamber’s limit controller and usually results from the chamber’s temperature exceeding the high or low limit set on the limit controller. To clear this alarm, adjust the high/low limits accordingly or wait for the chamber’s temperature to fall back within the limit range.

HS Compressor

Short for High Stage Compressor Pressure Safety, this alarm indicates that the refrigeration circuit’s pressure limit is being exceeded. This typically requires a refrigeration technician to resolve.

PLC Comm Loss

Indicates that the Watlow controller has lost communication with the PLC controller. This may be able to be cleared by switching the power switch on the PLC to Stop, waiting ten seconds, and switching it back to Run; if that doesn’t work reach out to AES Support for further troubleshooting.

VFD Alarm

Indicates an issue with the VFD controller that controls the speed of the chamber’s circulation fan; reach to AES support for further troubleshooting.

Burst Disk

Indicates the rupture disk on the side of the chamber has either come unplugged from the main controller or has burst. If the latter happens, reach out to AES Parts team to order a replacement.

External Enable

Refers to the green terminal on the back of the chamber pictured below. The chamber comes with a jumper cable connected between ports 1 and 2 on this terminal, the External Enable alarm typically indicates that this cable has been removed.

E-Stop

Refers to the red Emergency Stop button on the front of the chamber, this alarm will be triggered if that button is pressed in. To clear the alarm, pull the button back out.

Over Temp

Indicates that one of the chamber’s product sensors has exceeded its temperature limit (typically set to 80C), the alarm will clear once the sensor’s reading falls below the limit.

Rapid Temp

Indicates that the ramp rate limit (typically set to 0.2C/second) has been exceeded on one of the product sensors. This alarm can either be cleared on the controller or by unplugging the sensors and plugging them back in.