User Manual
8. Lock parameters
In normal operating,press button and hold for 10 seconds to lock the parameters if OFF displayed
(No odification is allowed),or to unlock if ON is displayed. Parameter can be displayed only and can
not be modified if locked, but the adjustment of the set temp. is active.(the factory default is ON )
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Circuit Diagram
Notes for Installation
Accessories for the temperature controller
1. Sensor 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 controller.
2. When installation the probe shall be placed with the head upward and the wire downward; The evaporator
probe must be installed between the fins of the evaporator in the area,where probably the ice is the thickest.
Don't place the evaporator probe near the electric heater.
3.
The temperature controller can not be installed in the area with water drops.
1. One attached transformer
2. Two temperature sensors
3. One installation stand
4. One cover panel and 1 3 10mm screwφ ×
In case of long-distance sensor installation from the controller, the sensor cable may be prolonged up to
100 m max. without any re-calibration.
4.
Function details
1. Temperature controller
After turning on for one minute, the evap. fan operates, And after the delay time ,the compressor starts
operating when cold room temperature (set temp.+ Hysteresis ), and will be off when cold room
temperature set temp.
To protect the compressor, it can re-start unless the time when the compressor stops every time is longer
than the delay time (Parameter E4).
2. Defrost
It defrosts and heats only if the temp. of the evap. sensor is less than the defrost termination temperature
(Parameter F3).
Operating after a defrost interval time. it will be automatically in the status of defrost. If the temperature
of evap. sensor is less than the defrost termination temp. , the defrost LED will turn on, the heater
work, and the compressor and the evaporation fan will stop.
When the temp. of the evap. sensor is over the temp. of defrost termination; or the defrost duration ends,
the compressor will exit the defrost status. The heater will stop. After two minutes it will be in the normal
status of refrigeration, after one minute the evaporation fan will run.
When the defrost interval time is set 00 , the function of automatic defrost will be cancelled.
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 ends, normal display will be resumed after 20 minutes delay of room
temp. display. The defrost LED flashes during the delay.
4. Abnormal work mode:
When room sensor is short-circuited or overheated (more than / ) HH is displayed; when room
sensor open-circuit or too low (less than / ) LL is displayed. At that time the
compressor automatically by the cycle of 45 minutes on and 15 minutes off.
When evap. sensor fails or over the displayed range, the defrost termination will be just controlled by the
defrost duration. (Parameter F1)
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— ℃temperature is