Refrigeration Control System User Manual
This manual details the operation and configuration of the refrigeration control system.
Important Notice
The control panel may lock after 15 seconds of inactivity. To unlock, press and hold two buttons simultaneously for 3 seconds. Two beeps indicate the unit is unlocked.
1. Main Display Window
The main display window shows temperature values, menu codes and values, and alarming or error codes. The display flashes in setting mode and remains stable in main display mode. A beep sounds upon power-on, followed by the display of the internal appliance temperature.
2. Indicators and Descriptions
| Indicator | Status | Meaning |
|---|---|---|
| ❄️ | Stable Lighting | Refrigerating |
| ⏳ | Light flashing | The compressor is waiting to start |
| ? | Stable Lighting | Evaporator fan is running. |
| ❄️? | Light flashing | Delaying time after defrosting |
| ❄️? | Stable Lighting | Defrosting, 'DEF' is displayed |
| ? | Light Flashing | Dripping during defrosting; or Delaying when waiting for hot air defrosting |
| ? | Light Flashing | The door is open or not properly closed. |
| ⚠️ | Light Flashing | Condense temperature sensor reached the warning value, failure warning |
| ⚙️ | Stable Lighting | Auxiliary function (customized) started, Auxiliary timer closed (discharge pump manually operated) |
| ? | Stable Lighting | Wifi turned on |
| °C | Stable Lighting | Display current temperature in Celsius degree |
| °F | Stable Lighting | Display current temperature in Fahrenheit degree |
3. Keys and Functions
| Icon | Key | Function |
|---|---|---|
| SET | Setting key | Enter programming mode, choose a parameter |
| ▲ | Increase key | Check parameter value, increase the value |
| ▼ | Decrease Key | Check parameter value, decrease the value |
| ? | Manual discharge key | Turn on/off the drain pump |
| ? / °C/°F | Mute and 'C/'F shift | Pause alarm, shift to Celsius or Fahrenheit |
| ❄️ | Manual defrost key | Start or end the defrosting process |
| ⚡ | Stand-by key | Return to set mode, On/stand-by |
4. Main Function of the Keys
Check the Set Temperature
When the control panel is unlocked and displayed, tap the SET key. The screen will flash showing the current set temperature. Tap SET again or wait 6 seconds to return to the cabinet temperature display.
Change the Set Temperature
When unlocked, tap SET softly to display the set temperature. Use the UP (▲) and DOWN (▼) buttons to adjust the desired temperature. Holding either button for over 1 second allows for continuous adjustment. The setting mode exits automatically after 6 seconds of inactivity or upon pressing SET again.
Alarm (Mute and Ring Back)
During an alarm, accompanied by beeping sounds, an error code will appear on the main window. Tap the mute key to silence the alarm. The beep will reoccur if the alarm condition persists. The cycle repeats until the alarm is resolved.
Manual Start/End Defrost Process
Under unlocked status, press and hold the SET key for 3 seconds to initiate manual defrost. To end the defrost process, press and hold the same key for 3 seconds.
Switch Between Celsius/Fahrenheit
Under unlocked status, press and hold the 'C/°F' key for 3 seconds to switch between Celsius and Fahrenheit. The corresponding indicator light will change.
Stand-by and Work Status
Press and hold the power key (⚡) for 3 seconds to switch between stand-by and work modes. In stand-by, only the power key light is red, and all other outputs are closed.
5. Change the Parameter
Menu Search
Unlock the control. Press and hold the SET key until 'PC' is displayed. Press the UP (▲) or DOWN (▼) key until '26' appears, then press SET. Letters like 'r', 'c', 'd', 'F', 'A', 'H' will appear sequentially. Select a letter by pressing SET to confirm. For example, selecting 'r' and pressing SET will display the first parameter code ('rL') under 'temperature and sensor management'. Pressing SET again allows scrolling through all parameters starting with 'r'.
6. Check and Modify Parameter Value
Enter the menu list. Press the SET key repeatedly to find the desired parameter code. After selecting a parameter, press the UP (▲) or DOWN (▼) key to view its current value. Continue pressing UP or DOWN to modify the value. Press SET to confirm, or wait 8 seconds without action for automatic confirmation and exit.
Parameter Table Overview
The following tables list various parameters, their definitions, value ranges, units, and default settings for both refrigerator and freezer modes.
Temperature and Sensor Management Parameters:
| Code | Definition | Minimum Value | Maximum Value | Unit | Default (Refrigerator) | Default (Freezer) |
|---|---|---|---|---|---|---|
| rL | Lowest temperature can be set | -40 / -40 | rH | °C / °F | -5 / 23 | -22 / -7 |
| rH | Highest temperature can be set | rL | 120 / 248 | °C / °F | 10 / 50 | -10 / 14 |
| St | Control Temperature setting value | rL | rH | °C / °F | 1 / 33 | -22 / -7 |
| rd | Temperature control Hysteresis Error | 1 / 1 | 10 / 18 | °C / °F | 4 / 5 | 4 / 5 |
| r1 | Cabinet temperature probe compensation | -10 / 14 | 10 / 50 | °C / °F | 0 / 0 | 0 / 0 |
| r2 | Evaporator probe temperature compensation | -10 / 14 | 10 / 50 | °C / °F | 0 / 0 | 0 / 0 |
| r3 | Condenser probe temperature compensation | -10 / 14 | 10 / 50 | °C / °F | 0 / 0 | 0 / 0 |
| rA | Defrost probe enable | 0=disable; 1=enable | / | / | 1 | 1 |
| rB | Condenser probe enable | 0=disable; 1=enable | / | / | 0 | 0 |
| r0 | Unit of temperature | 0=Celsius; 1=Fahrenheit | / | / | 0 | 0 |
Evaporator Motor Parameters:
| Code | Definition | Minimum Value | Maximum Value | Unit | Default (Refrigerator) | Default (Freezer) |
|---|---|---|---|---|---|---|
| F0 | Evaporator motor running mode | 0=synchronize with compressor, and when it starts to defrost; 1=always running, and stop when it starts to defrost; 2=start and stop on setting temperature, stop when it starts defrost; 3=synchronize with compressor, run when it starts to defrost; 4=always running even during defrosting. | / | / | 1 | 0 |
| F1 | Evaporator start mode after defrosting | 0=on set delay time; 1=on set start temperature | / | / | 1 | 1 |
| F2 | Evaporator motor start delay time after defrost | 0 | 20 | min | 3 | 5 |
| F3 | Evaporator motor stop temperature | -40 / -40 | 40 / 104 | °C / °F | 2 | 2 |
| F4 | Evaporator motor start temperature | -20 / -4 | 20 / 68 | °C / °F | -5 | -10 |
Defrost Parameters:
| Code | Definition | Minimum Value | Maximum Value | Unit | Default (Refrigerator) | Default (Freezer) |
|---|---|---|---|---|---|---|
| d0 | Defrost type | 0=electrical heating defrost; 1=hot air defrost | / | / | 0 | 0 |
| d1 | Interval time between Two defrost process | 0 | 24 | hour | 4 | 3 |
| d2 | Defrost change rules enable | 0=enable; 1=disable | / | / | 0 | 0 |
| dp | The longest time of defrosting | 2 | 60 | min | 20 | 20 |
| dt | Defrost stop temperature | 0 / 32 | 40 / 104 | °C / °F | 12 | 12 |
| dd | Delay output time after Defrost start | 0 | 20 | min | 0 | 0 |
| dr | Dripping time after finish defrosting | 0 | 20 | min | 2 | 2 |
| d7 | Display delay after finish defrosting | 0 | 20 | min | 2 | 2 |
| d8 | Cabinet temperature display delay after finish defrosting | 0 | 20 | min | 15 | 15 |
Other Parameters:
| Code | Definition | Minimum Value | Maximum Value | Unit | Default (Refrigerator) | Default (Freezer) |
|---|---|---|---|---|---|---|
| H3 | Nixie tube temperature display | 0=Cabinet temperature r1; 1=defrost probe temperature r2; 2=condenser temperature r3 | / | / | 0 | 0 |
| H4 | Alarm shutdown enable | 0=enable; 1=disable; | / | / | 0 | 0 |
| HH | Delay shutdown time after AH alarm is triggered | 0 | 72 | hour | 36 | 36 |
| HC | Delay shutdown time after AC alarm is triggered | 0 | 72 | hour | 36 | 36 |
| Hr | Restore factory default settings | 0=null; 1=restore factory default setting | / | / | 0 | 0 |
| HL | Enable WIFI communication | 0=disable; 1=enable | / | / | 0 | 0 |
Fault Codes
| Code | Description | Cause |
|---|---|---|
| Err1 | Sensor1 fault = cabinet temperature probe | Open circuit or short circuit |
| Err2 | Sensor2 fault = defrost probe | Open circuit or short circuit |
| Err3 | Sensor3 fault = condenser probe | Open circuit or short circuit |
