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NA327 User Guide
Main Function
Refrigerating controlling: temperature display, temperature controlling, compressor start delay
protection, temperature sensor error alarm.
Beater controlling: the beater always runs when refrigerating, it can run periodically with the on-off rate
when it is not in refrigeration state, and you can turn on or off the beater manually when it is not in
refrigeration state .
External alarm: one channel external alarm, it can be set to 5 modes: always open, always open locked,
always closed, always closed locked or forbidden.
¤Main Technique Index
Temperature display range: -50～125C(The step between -9.9 and 99.9C is 0.1C，else 1C)
Temperature setting range: -45～120C(The step between -9.9 and 99.9C is 0.1C，else 1C)
Power Supply: AC 220V±10% or 380V±10%, 50Hz (Refer to the wiring diagram)
Operating environment: temperature -10℃～45℃, humidity≤85%.
Relay contact capability: 2A/380VAC (pure resistive load)
Temperature sensor: NTC R25=5kΩ, B (25/50) = 3470K
Executive standard: Q/320585 XYK 01-2004 (NA320-CTAX)
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 upper limit Set upper limit temperature -
Temperature lower limit Set lower limit temperature -
Beater Beater running -
Refrigeration Refrigerating The state of compressor start delay protection
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. The temperature and the alarm code (Axx) will show alternately
when in the alarm state.
Alarm codes are as follows:
Code signification Explanation
A11
External alarm External alarm input, refer to the internal parameter code “F50”
A21
Temperature sensor error Open or short (showing “EE”or “-EE”)
How to set “Temperature upper limit ”and “Temperature lower limit”?
Press “set”at least 2 seconds, the nixietube shows the upper limit temperature, and “upper limit”LED lights,
then using “”or “”can adjust the parameter. After setting, press “set”, then enter the “lower limit”, using
“”or “”can adjust the parameter.（“”adds 0.1C，“”minuses 0.1C，holding it over 0.5 seconds can add
or minus rapidly）
Notice：1。 In the state of temperature setting，it will exit the state of setting if don’t press the key within
30 seconds.
2． The value can be only saved after exiting the state of setting. The value which has been
adjusted can not be saved if the power is off before exiting the state of setting.
How to defrost manually?
In no refrigeration state, press the key “”and hold it for 2 seconds, the controller can turn on or off the
beater. In refrigeration state, the beater always runs and can not be turned off manually.
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 “”, “”continuously in the state of showing current temperature, and it must be finished within 3 seconds，
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