A summary of 'Defrost Mode' parameters for the SCS Controller including the digital display codes, increments and default settings.
The Defrost Cycle can be initiated or terminated by either time or temperature. During the Defrost Cycle the Normal Operational Mode is overridden to control the Compressor, Evaporator Fan, Lights, and if used, any valves or heater elements connected to the Relay.
Supported Defrost Cycle methods are hot gas defrost (reverse cycle), ambient defrost (with the compressor turned off), and a forced defrost (with an electric heater element). These parameters provide the options to control and configure the Defrost Cycle.
Temperature
| Parameter name | Digital display | Increments & units | Range | Default |
| Defrost Initiation Temperature | dIt | 1°C | -15 to 10°C or dISabled | dISabled |
| Defrost Termination Temperature | dtt | 1°C | 0 to 30°C | 30°C |
| Uninterrupted Pull Down Temperature* |
Pdn | 1 °C | 0 to 25 or dISabled |
dISabled |
* Not available on SCS500 variants
Time
| Parameter name | Digital display | Increments & units | Range | Default |
| Maximum Defrost Cycle Time | dCt | 1 min | 1 to 120 mins | 20 mins |
| Maximum Defrost Interval | dEI | 1 hour | 1 to 48 hours | 3 hours |
| Defrost Type | dtP | integers | 0 - 3,4** | 3 |
| Passive Dripping Time | dPt | 1 min | 0 to 30 mins | 0 min |
| Active Dripping Time*** | dAt | 1 min | 0 to 30 mins | 0 min |
** FW Versions 1592 and above
*** FW Versions 4010 and above
Lighting & Display
| Parameter name | Digital display | Increments & units | Range | Default |
| Display Value During Defrost Cycle# |
ddE | integers | 3 | 3 |
| Pre-time For Hot-gas Defrost** | n/a | 1 min | 0 to 240 mins | 0 min |
** FW Versions 1592 and above
# Not yet implemented