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1. Ideal for fan cooling &low temperature control2.With copy card function3.Can control 1HP compressor directly4.Manually, automatically defrost by electric heater5.Evap.fan control6.Time / temp.setting to end defrost7.Delay start8.Parameter locking9.Range: -45 to 66 degree C (±2 degree F)10.Accuracy: ±1 degree C (±2 degree F)11.Sensor: 2pcs, NTC(cold-room, defrosting)12.Power supply: 230VAC or 120VAC, 50 / 60Hz13.Compressor relay: 16A / 1HP14.Light relay: 10A / 250VAC15.Evap.fan: 8A / 250VAC16.Dimension: 77x35x30mm
| Parameter | Function | Set range | Default |
| E1 | Lower setpoint limit | -45oC/oF to Set temp. | -35oC/-31oF |
| E2 | Higher setpoint limit | Set temp. to 45oC/120oF | 20oC/68oF |
| E3 | Temp.Hysteresis | 1 to 10oC/1 to 18oF | 4oC/7oF |
| E4 | Comp.start delay time | 0 to 10Min | 2Min |
| E5 | Offset on room temp. | -20 to 20oC/-36 to 36oF | 0 |
| E6 | Offset on evap.temp. | -20 to 20oC/-36 to 36oF | 0 |
| F1 | Max.defrost duration | 1 to 60Min | 20Min |
| F2 | Defrost interval time | 0 to 24Hr | 6Hr |
| F3 | Defrost termination temp. | 0 to 20oC/32 to 68oF | 8oC/46oF |
| F4 | Display during defrost | 0=Normal display1=Last value before defrost | 0 |
| F5 | Fan operating function | 0=Parallel with comp.1=Continuous running except defrost | 0 |
| C1 | Temperature unit | C=Celsius F=Fahrenheit | C |
Digital Temperature Controller SF-634