Skip to content
English
Contact us
  • There are no suggestions because the search field is empty.

Defrost Mode parameters for the SCS Controller

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  −50 to 10 °C (or −35 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

^ The base firmware range is −35 to 10 °C with the expanded range for deep-freeze applications. 

* Not available on SCS500 variants

Time

Parameter name Digital display Increments & units Range Default
Maximum Defrost Cycle Time    dCt 1 min 0 to 180 mins  20 mins 
Maximum Defrost Interval   dEI 1 hour 1 to 48 hours  3 hours 

Defrost Type  

( 0 = disabled, 1 = Defrost Cycle using electric heater, 2** = Defrost Cycle using hot gas (reverse cycle), 3 = Defrost Cycle by turning off the Compressor (ambient
defrost), 4 = Defrost Cycle using electric heater + fan)


** FW versions 1592 and above.

 dtP integers   0 - 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

0 = probe temp
1 = set point
2 = blank
3 = dEF

4 = blinking dEF

 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