Arrived on site. Checked in with management. Inspected deli case. Found deli case attempting to start first compressor, then when second compressor would attempt to start system with shut down on safety. Found control throwing low-voltage symbols. Called Darren for tech-support. Found 20 amp breaker had been sharing a pole with another breaker, causing low-voltage for deli case. Replaced deli case 20 amp breaker to its own pole. Found controller for Delhi case had been burnt out from low-voltage. Replaced controller for deli case. Cycled system back on. System is performing properly at this time. Darren will be sending a new controller for deli case to Ambient Edge office. New controller will be swapped after time of arrival.