---
title: Supply parameters for the SCS Controller
description: The Supply Parameters configure acceptable limits for Voltage supply to the SCS Controller and configure associated alarms. This protects the refrigeration system from electrical damage.
---
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January 22, 2026
# Supply parameters for the SCS Controller
## The Supply Parameters configure acceptable limits for Voltage supply to the SCS Controller and configure associated alarms. This protects the refrigeration system from electrical damage.
- Find out how to [Edit parameter files using Field app](https://support.aofrio.com/read-parameter-files-using-field-app?hsLang=en)
**Maximum Run/Start Compressor Voltage**
The maximum Voltage at which the Compressor is allowed to start and run. After detecting an Over Voltage condition the Compressor is turned off. The minimum compressor off time must be exceeded before the compressor can turn back on. These events are logged in the SCS Controller.
| **Digital Display** | **Increments & units** | **Range** | **Default** |
| --- | --- | --- | --- |
| hPC | 1 Vac | 100 V to 265 V or disabled | 254 Vac |
**Minimum Start Compressor Voltage**
The minimum Voltage during which the Compressor is allowed to start. If it is below this Voltage then the Compressor cannot start. If the Voltage rises to an acceptable level then the Compressor can start, but only after the Voltage has been maintained for a delay period. These events are logged in the SCS Controller.
| **Digital display** | **Increments & units** | **Range** | **Default** |
| --- | --- | --- | --- |
| LPC | 1 Vac | 79 V to 203 V or disabled | 90 Vac |
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