MMUNNA ST3012 ZFX-ST3012 Dual Temperature Controller Instruction Manual

Introduction

This manual provides detailed instructions for the installation, operation, and maintenance of the MMUNNA ST3012 ZFX-ST3012 Dual Temperature Controller. This device is designed for precise temperature control, featuring a dual display and dual control capability for both refrigeration and heating applications. Please read this manual thoroughly before use to ensure proper function and safety.

Product Overview

The ST3012 ZFX-ST3012 is a versatile digital thermostat capable of controlling two independent temperature zones. It features an LED digital display for clear temperature readings and intuitive button controls for setting parameters. This controller is suitable for various applications requiring accurate temperature management.

Front view of the ST3012 ZFX-ST3012 Dual Temperature Controller showing LED displays and control buttons.

Figure 1: Front view of the ST3012 ZFX-ST3012 Dual Temperature Controller, highlighting the dual LED displays, 'UP', 'DOWN', and 'SET' buttons, and indicator lights.

Specifications

Working Voltage / Power	DC 12V / 120W; DC 24V / 240W; AC 110V-220V / 1500W (model dependent)
Sensor Model	NTC (10K/3435)
Working Current	Max 200mA
Data Storage	Available
Working Temperature	0°C ~ 50°C
Storage Temperature	-10°C ~ 60°C
Temperature Control Range	-50°C ~ 110°C
Temperature Measurement Error	±0.5°C
Meter Dimensions (LxWxH)	76mm x 55mm x 31mm
Mounting Hole Size (LxH)	70mm x 50mm
Sensor Probe Length	1 Meter
Item Weight	50 Grams (approx. 1.76 ounces)

Dimensions of the ST3012 ZFX-ST3012 Dual Temperature Controller with measurements in millimeters.

Figure 2: Physical dimensions and connection points of the ST3012 ZFX-ST3012 controller.

Functional overview of the ST3012 ZFX-ST3012 controller with key parameters and power ratings in Chinese and English translation.

Figure 3: Functional overview of the ST3012 ZFX-ST3012, detailing measurement and control ranges, sensor type, data storage, output type, dimensions, and power ratings for 12V, 24V, and 220V models.

Setup and Wiring

Proper wiring is crucial for the safe and correct operation of the temperature controller. Ensure all connections are secure and match the specified voltage for your model.

1. DC 12V/24V Wiring Mode

For DC 12V or 24V models, connect the power supply and load as shown in the diagram below. Pay close attention to polarity (+/-).

Wiring diagram for DC 12V/24V ST3012 ZFX-ST3012 Dual Temperature Controller, showing connections for load and power supply.

Figure 4: Wiring diagram for DC 12V/24V power supply. The load side connects to the output terminals, and the 12V/24V power supply connects to the input terminals, observing polarity.

2. AC 110V-220V Wiring Mode

For AC 110V-220V models, connect the power supply and load according to the diagram. Ensure all connections are made to a suitable AC power source.

Wiring diagram for AC 220V ST3012 ZFX-ST3012 Dual Temperature Controller, showing connections for load and power supply.

Figure 5: Wiring diagram for AC 110V-220V power supply. The load side connects to the output terminals, and the 110V-220V power supply connects to the input terminals.

Important Safety Note: Always disconnect power before performing any wiring or maintenance. If you are unsure about electrical wiring, consult a qualified electrician.

Operating Instructions

Setting Control Temperatures

The ST3012 ZFX-ST3012 allows for independent temperature settings for its two control channels (left and right displays).

Set the Left Control Temperature:
- Press the "SET" button once. The left screen display will flash.
- Use the "UP" and "DOWN" buttons (left side) to adjust the desired temperature.
- To save and exit, press any of the right side "UP" or "DOWN" buttons.
Set the Right Control Temperature:
- Press the "SET" button twice. The right screen display will flash.
- Use the "UP" and "DOWN" buttons (right side) to adjust the desired temperature.
- To save and exit, press any of the right side "UP" or "DOWN" buttons.

Parameter Settings (Menu Codes)

To access and modify advanced control parameters:

Press and hold the "SET" button for three seconds to enter the parameter setting menu.
Use the "UP" or "DOWN" buttons to navigate through the menu codes.
Once you have selected a menu code, press the "SET" button once to enter its setting state.
Use the "UP" or "DOWN" buttons to adjust the parameter value.
Press the "SET" button again to save the change and exit the current parameter setting, or wait for a few seconds for it to auto-save and exit.

Menu Code Descriptions:

Menu Code	Description	Explanation / Unit
HC	Refrigeration/Heating Mode	Set thermostat working mode: H = Heating, C = Cooling
D	Temperature Difference (Hysteresis)	Temperature difference between startup and shutdown. Prevents rapid cycling.
LS	Ultralow Temperature Alarm	Set the lower limit for temperature alarm.
HS	Ultratemperature Alarm	Set the upper limit for temperature alarm.
CA	Temperature Correction	Adjusts the measured temperature for calibration.
PT	Delay Start	Minimum downtime before restarting the compressor/heater (in minutes).

Start and Stop Timing

While in standby mode, press the "SET" button once to initiate timing output. The screen will alternate displays, indicating timing is active.

Maintenance

Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners or solvents.
Sensor Care: Ensure the temperature sensor probe is kept clean and free from obstructions for accurate readings. Avoid bending or damaging the sensor cable.
Power Disconnection: Always disconnect power to the unit before performing any cleaning or inspection.
Environmental Conditions: Operate and store the device within the specified temperature and humidity ranges to ensure longevity.

Troubleshooting

If you encounter issues with your ST3012 ZFX-ST3012 controller, refer to the following common troubleshooting steps:

No Power/Display:
- Check power connections to ensure they are secure and correctly wired according to the voltage (12V, 24V, or 110-220V AC).
- Verify the power source is active and providing the correct voltage.
Inaccurate Temperature Reading:
- Ensure the sensor probe is correctly connected and not damaged.
- Check if the sensor is placed in an appropriate location, away from direct heat sources or drafts that could affect readings.
- Consider using the "CA" (Temperature Correction) parameter to calibrate the sensor if a known accurate reference thermometer is available.
Controller Not Activating Load (Heating/Cooling):
- Verify that the "HC" parameter is set correctly for Heating (H) or Cooling (C).
- Check the set temperature and the current temperature. The load will only activate when the temperature deviates beyond the set point and hysteresis ("D" parameter).
- Ensure the "PT" (Delay Start) parameter is not preventing immediate activation.
- Inspect load wiring for secure connections.
Alarm Triggering Unexpectedly:
- Review the "LS" (Ultralow Temperature Alarm) and "HS" (Ultratemperature Alarm) settings to ensure they are appropriate for your application.
- Check for sudden temperature fluctuations that might be triggering the alarm.

If problems persist after following these steps, please contact customer support.

Warranty and Support

MMUNNA products are designed for reliability and performance. For specific warranty information, please refer to the documentation included with your purchase or contact your retailer. For technical support or inquiries, please reach out to MMUNNA customer service through the contact information provided on the product packaging or the official MMUNNA website.

Manufacturer: MMUNNA