Model: SF-283F Digital Temperature Controller
Features of Function
It is an intelligent controller and applicable to the compressor of one HP.
（ Include 1HP ）
Temperature Display / Temperature Control / Defrost by turning off comp.
／ Light control / Fan control
High, low temperature alarm/ Value Storing /Parameter Locking/Self Testing
Specifications
When deliver: E1 adjust to -20 (-04 ℉ )
1. Power supply input: 220~240VAC
2. Temperature sensor: NTC, one sensor, 3.5 meters long, neither positive nor negative
3. Range of temperature display:
－
45 ～ 99 ℃ (-49~210 ℉ ) Accuracy:
± ℃ ± ℉
4. Range of set temperature: E1~E2
5. Dimension:178(Length) × 31(Width) ×
Factory default : 05
34(Depth)mm
℃
/41
℉
Mounting hole dimension:172(Length) × 26(Width)mm
6. Temperature of the operating environment: — 10 ～ 60 ℃ (14~140 ℉ )
Relative Humidity:20%~90% (Non-condensing)
7. Relay output contact capacity
Compressor: N. O. 30A/250VAC
(applicable to one HP Compressor, if more it needs to connect an AC contactor)
Evap. Fan: N. O. 10A/250VAC Light: N. O. 10A/250VAC Defog: N. O. 10A/250VAC ress button t button to exit the adjustment and display the cold-room temperature. If no more button is pressed within 6 seconds, the cold-room temperature will be displayed. (Set temperature adjustment range: parameter E1
～
E2)
2. Power ON/OFF:Press button for 3 seconds to turn off refrigeration work mode and temperature display,
“
---
” will be displayed, and all the control outputs will be stopped(Except for the light). Press button again for once, the measured temperature will be displayed, refrigeration work mode will be started after delay time.
3.
Refrigerating LED: During refrigeration, the LED is on; When the cold room temp. is constant, the LED is off; During the delay process, the LED flashes.
4. Defrost LED: during defrosting, the LED is on; When it exit defrost, the LED is off.
5. Defog LED: During defog, the defog LED is on; When it exit defog, the LED is off.
6. Light LED: When it connects the light, the light LED is on. When it disconnects the light, the LED is off.
7. Manual start/stop defrost: Press button and hold for 6 seconds to defrost or stop defrost
8. Light: Press button, the light is connected. Press the button again, the light is disconnected.
9. When first time power on, press button for once to cancel compressor delay and start the compressor.
10. Defog control: Press button for once, to connect or disconnect the defog heater. When power on, the defog will start automatically, when power off, it is disconnected.
11. Check the condenser cleaning accumulated time: Long press for 6 seconds, flash display the accumulated power on operation days.
12. Condenser alarm control: long press and for 6 seconds can turn on or turn off the alarm function, flash display OFF or ON. The factory default in ON.
13. Parameter setup
Press button and hold for 6 seconds to enter the parameter setup mode while E1 flashes.
Press again button to select the parameters.
Press or button, the value of parameter will be displayed and can be modified and stored.
If no more button is pressed within 6 seconds, it will return to normal operation.
Parameter Function Set range Default Parameter Function
E1
E2
Lower set point limit
Higher set point limit
－
－
49
45
℉
℃
～ set temp.
Set temp.
～
113 ℉
45 ℃
32 ℉
00 ℃
46
℉
08
℃
C1
C2
C3
High temp. alarm
Low temp. alarm
Alarm delay time
Set range
C2 ～
113 ℉
45 ℃
－
－
49
45
℉
℃
～ C1
00 ～ 90min
Default
59 ℉
15 ℃
23 ℉
-05 ℃
90min
E3
E4
E5
F1
Temp. hysteresis
Comp. Start delay time
Offset on room temp.
Max. Defrost duration
02 ～ 36 ℉
01 ～ 20 ℃
00
～
10min
－ 18 ～ 18 ℉
－
10
～
10
℃
01 ～ 60min
0 5 ℉
0 3 ℃
3m i n
0 0 ℉
0 0 ℃
28min
H1 Fan control
H2
CF
P1
Fan retardant time when synchronized
Temperature unit
Condenser cleaning alarm time
00=Parallel with comp.(stop w hen defrost)
01 = Continuous running
(stop when defrost)
02= Parallel with comp. (S tart when defrost)
03=keep running(start when defrost)
00 ～ 120s
℃
=Celsius
℉
=Fahrenheit
01 ～ 120days
0 3
0 0 s
℃
60days
F2
F4
Defrost interval time
Disp lay during defrost
00 ～ 24hr
00=Normal display
01 = Last value before defrost
02=di splay DEF
6 hr
0 1
P2
P3
Compressor continuous work time
Compressor force stop time
01 ～ 120minutes
00=cancel force stop
00 ～ 90min
00m in
03min
14. Paramet ers Locking
Press button and hold for 6 seconds to lock the parameters if "LOC" is displayed, or to unlock if " OP is displayed. Parameters can be displayed only and can not be modified if locked. (The set temperature adjustment is still active) (The factory default is OP )
15.
The customer default resumption: press button and " and flashes, at this time will resume to factory defaults.
16. When adjusting the inner parameters, long press button, COP will be displayed, the current parameters will be saved as factory defaults.
17. Resume factory defaults: Press at the same time for 6 seconds, flash display CLE.
Function details
1. Temperature Control
After turning on for the delay time , the compressor starts operating when cold-room temperature
≥
(set temperature+ Hysteresis E3), and will be off when cold-room temperature
≤ set temperature.
2.
To protect the compressor, it can not be re-started unless the time when the compressor stops every time is longer than the delay time(Parameter E4).
Defrost by turning off compressor
After a defrost interval will automatically enter the defrost state. The defrost LED is on, the compressor stops.
When defrost duration ends, will exit defrost state. When cold room temperature is more than (set temp. + temp.
Hysteresis E3), the compressor starts.
3. Display during defrost
When setting the parameter F4=1, the room temp. is locked during defrost, and the last value before defrost is displayed.
When defrost en ds, norm al displ ay wil l be resumed after 20 minut es del ay or ( temperature is lower than the set temperature).
4. Fan work mode
When F4=2, dEF will be d isplayed.
when the cold-room
The fan will work according to H1; when synchronized with comp., Delay H2 time and then start or stop.
5. Compressor force stop work mode: when first time power on or after stand by and start, it will start this work mode only when compressor reach the set temperature and stop or pass one defrost by turning off compressor. When the compressor continuously work time
≥
P2, the compressor will stop for P3 and then re countdown.
6. High, low temperature over limit alarm
High temperature alarm: After the first time turning off, when cold room temperature is higher than high temperature alarm value C1, and duration more than alarm delay time (C3), will alternate display HI and the cold room temperature.
When the cold room temperature is lower than high temperature alarm C1, will exit alarm, and the cold room temperature will resumed to be displayed.
Low temperature alarm: When cold room temperature is lower than low temperature alarm value C2, and duration more than alarm delay time (C3), will alternate display L0 and cold room temperature. When cold room temperature is more than low temperature alarm value C2, will exit alarm and resume cold room temperature display.
When alarm, the buzzer sound , press random button to cancel the sound.
display cold room temperature and Cln. At this time, press random button to cancel the sound, after 2 minutes it will exit the alarm, the accumulated time will be cleared and will recount, it will resume normal display. During alarm state power off or shut down, when next time power on will keep alarming.
Alarm test: When turning on the condenser cleaning alarm function, when power on within 10 seconds, long press and for 6 seconds, flash display tes, the previous accumulated time will be cleared. After 5 minutes, will start the alarm.
8.
Abnormal work mode
When the room sensor is short-circuited or overheated (more than 99 ℃ /210 ℉ ) "HH will be displayed ;When the room sensor is open-circuited or temperature is too low ( less than － 45 ℃ /-49 ℉ ) LL will be displayed. At that time the compressor works automatically by the cycle of 30 minutes on and 15 minutes off.
9. Circuit Diagram
C onnect the el ectric control board
Connect the meter head
Notes for Installati on
1. The sens or cable leads must be kept separately from main voltage wires in order to avoid high frequency noise induced. Separate the power supply of the loads from the power supply of the c ontroller.
2. When inst all the sensor, it shall be placed with the head upward and the wire downward.
3.
In case of l ong-distance sensor installation from the controller, the s ensor cable may be prolonged up to
100 m max. without any re-calibration.
4.
The temperature controller can not be installed in the area with water drops.
5. The temperature controller can not be installed in the corrosive and strong electromagnetic pulse interference places.
Accessories for the temperature controller
1. One temperature sensor 2. One connecting wire
