A52x Series Electronic Refrigeration Controller with Adaptive Defrost Technical Bulletin
12
Figure 9: Compressor and Lo/Aux Relay States for Single Speed Evaporator Fan Operation in Normal
Refrigeration Mode: Continuous On Fan or Cycling Fan with Compressor
Figure 10: Compressor, Lo/Aux, and Hi-Spd Relay States for Two Speed Evaporator Fan Operation in
Normal Cooling Mode: Continuous High Speed Fan
Figure 11: Compressor, Lo/Aux, and Hi-Spd Relay States for Two Speed Evaporator Fan Operation in
Cooling Mode Set Up for Low Speed Fan when Compressor is Off, High Speed when Compressor is On
On
Off
On
Off
Off
On
Off
On
Off
On
Off
Off
On
Off
On
Compressor Relay
HI-SPD Relay
1-Speed Evap Fan
(On Continuous)
HI-SPD Relay
1-Speed Evap Fan
(Cycles with
Com pressor Relay)
Time
