Omcan RS-CN-0250, Instruction Manual

Page: 11 / 20

11
Controller Instructions
E3 Temperature Hysteresis Approx. 00 – 10°C
Approx. 1 – 36°F
05°C
07°C
4°
E4 Compressor Start Delay Approx. 00 – 10 minutes 00° 0°
E5 Offset On Room Temperature Approx. -5°C - 5°C / F 00° -1°
E6 Offset On Evaporator Temperature Approx. -5°C - 5°C / F 00° 0°
F1 Maximum Defrost Duration Approx. 1 – 60 minutes 20° 25°
F2 Defrost Interval Time Approx. 00 – 24 hours 06° 4°
F3 Defrost Termination Temperature Approx. 0 – 20°C
Approx. 32°F - 68°F
12°C
54°F
20°
F4 Display During Defrost 00 = normal display
01 = Last value before
defrost
01° 0°
C1 Temperature Unit 00 = °C
01 = °F
00° 0°
CPA Changing Menu Password Approx. 00 – 90 (Setting
“00”, the menu password is
cancelled).
00° 0°
Notes:
• The parameters can be changed only after the correct PA is entered, or else it can only be checked.
Temperature controlling can be changed without the correct PA.
• PA is set “00”, no password required for checking and/or changing.
PARAMETER DETAILS
• Temperature controlling: After turning on for the delay time (E4), the compressor starts operating when
cold-room temperature is greater than the set temperature (set tempe hysteresis), and will be off
when cold-room temperature less than the set temperature. To protect the compressor, it can be restarted,
unless the time when the compressor stops is longer than the delay time (E4).
• Defrost by turning off: After a defrost interval, it begins automatic defrost function. Eg: When evaporator
sensor temperature is less than the defrost termination temperature (F3), the defrost LED is on and the
compressor stops. When evaporator sensor is greater than the defrost termination temperature or defrost
duration (F1) the defrost stops. After two (2) minutes of draining time, the cold-room temperature is greater
than (set tempe hysteresis) and the compressor starts. Tt goes back to refrigeration status. When
defrost interval time (F2) is set “00”, the function of automatic defrost will be cancelled. Temperature
displayed when defrost: If F4 is set “01”, it displays the temperature when defrost starts. After defrost, it will
continue to display this temperature for twenty (20) minutes and the defrost LED flashes, then come back
to normal temperature.
• Sensory work mode: If the cold-room sensor is short circuited or overheated, “HH” is displayed. If the cold-
room sensory has an open circuit or too low temperature, “LL” is displayed. The compressor automatically
has a cycle of forty-five (45) minutes on and fifteen (15) minutes off. When the evaporator sensor fails or it
is over the displayed range, the defrost termination will be just controlled by the defrost duration.