User Guide
Main Function:
The controller is a constant temperature controller (refrigeration + electric heating), it can switch
automatically from refrigeration mode to heating mode, and it contains the function of compressor boot
delay protection, temperature sensor error alarm.
Specs:
�� Temperature display range: -50～125°C（The step between -9.9 and 99.9°C is 0.1°C，else 1°C)
�� Temperature setting range: -45～120°C（The step between -9.9 and 99.9°C is 0.1°C，else 1°C)
�� Power supply: AC 240V±10% （Refer to the wiring diagram）
�� Operation environment: temperature -10℃～45℃, humidity≤85%.
�� Relay contact capability: 20A/250VAC (Pure resistive load)
�� Temperature sensor: NTC R25=5kΩ, B (25/50) = 3470K + 5 metre length
Size 11cm wide, 5.5cm high, 9cm deep.
Operating Guide
What’s the meaning of the index lights on the panel?
The function of the LED on the panel is showing below:
|
LED
|
LIGHT
|
FLASH
|
|
Temperature setting
|
In the state of temperature setting
(not revised)
|
In the state of temperature setting
(has been revised)
|
|
Difference setting
|
In the state of temperature difference
setting (not revised)
|
In the state of temperature difference setting
(has been revised)
|
|
Refrigeration
|
Refrigerating
|
The state of compressor boot delay protection
|
|
Heat
|
Heating
|
-
|
The meaning of the nixietube display
The nixietube usually shows temperature, if it shows “EE”, it means the temperature sensor is short, and “-EE” means the temperature sensor is open.
How to set the temperature?
Press the key “set” and hold it for 2 seconds, the Micro-controller displays temperature that is the “set
temperature”, then using “up arrow” key or “down arrow” key can change the parameter（“up arrow”adds 0.1°C，“down arrow”minuses 0.1°C，press and hold them over 0.5 seconds can add or minus rapidly）. After setting, press the key “set”
again, you will enter the “temperature difference”, then using “up arrow” key or “down arrow” key can change the
parameter. Press the key “set”, to exit the state of setting after finishing.
Notice：
1. In the state of temperature setting，it will exit the state of setting if no one presses the key
within 30 seconds.
2. The value can be only saved after exiting the state of setting. The value which has been
set can not be saved if the power is off before exiting the state of setting.
Advanced Operation
The controller can adjust some internal parameter to meet all kinds of need. The parameter is supplied
for special technologist, and common users don’t need to know. Please don’t change the internal parameter
of the controller casually, lest lead to the abnormity of the controller. The way to set the internal parameter
is as below:
Use the code to enter the state of parameter setting, the code is “up-down-up-down-up-up-down”，
Press the key”up arrow”,”down arrow” continuously in the state of showing current temperature, and it must be finished
within 3 seconds，if the code is right, you can enter the state of parameter setting, here the nixietube
shows “Fxx”，there into xx is a number，it means parameter code.
Use ”up arrow” or ”down arrow” to select the parameter code，Pressing the “set” key can make it to show the value of
the parameter after select the parameter, here you use”up arrow” or ”down arrow” to set the parameter, then press the “set”
key to return to the state of showing parameter code after finishing setting.
（Notice：The parameter which
has been changed can be only saved after returning to the state of “Fxx” by pressing the “set” keys）
Internal parameter code is showing below:
|
Sort
|
Code
|
Parameter Name
|
Range
|
Factory
Setting
|
Unit
|
Remark
|
|
Temperature
|
F19
|
Temperature Revision
|
-5 -- +5
|
0
|
degrees C
|
Revise the sensor bias
|
|
Compressor
|
F21
|
Compressor delay time
|
0 -- 10
|
3
|
min
|
|
|
Testing
|
F99 |
Check
|
|
|
|
This function can attract all relays in turn, & please dont use it when the contoller is running! |
| |
F00 |
Exit
|
|
|
|
|
Basic Operating Principle
Temperature controlling and the principle of refrigeration and heating auto switch
Temperature controlling is based on the “setting temperature” and “temperature difference”, if the
“setting temperature” is 25°C and “temperature difference” is 5°C, then the controller turns on
refrigeration when the temperature of the sensor goes up to 30°C, the controller will turn off refrigeration
when the temperature of the sensor goes down to 25°C. In the same way, the controller will turn on heating
when the temperature is below 20°C, and the process of heating will end when the temperature goes up to
25°C. Thus the controller can achieve auto switch of refrigeration and heating, and the temperature will be
controlled between 20°C and 30°C.
Compressor delay time
The controller contains a “compressor halt calculagraph”, and it begins to time when compressor
stops, the program first check the calculagraph before starting the compressor next time, the program will
immediately start the compressor if the calculagraph reach 3 minutes ,if the calculagraph doesn’t reach 3
minutes ,it will start again when the calculagraph reaches 3 minutes. Thus you can ensure that the boot
alternation is over 3 minutes after halt, so it can prevent to breaking the compressor as a result of frequent
boot.
In addition, the controller doesn’t boot the compressor within 3 minutes after turning on the power
supply, thus the compressor can also be protected in the state of power cut and then power on.
（*Annotation：The time of boot delay protection can be adjusted, it sets to 3 minutes above.）
Wiring Diagram:
Notice：
1. The earth terminal of the controller should be connected with the earth terminal of the electric
cabinet reliably，be sure to connect the earth well.
2. Please use sensors which are supplied by our company.
