How to use the chiller and how to troubleshoot some problems
Overview
Below is a brief guide on the specified topics. For comprehensive details, please refer to the individual manuals for each chiller.
Applicable Chiller Types
- CW-5200
- CW-5201
- CW-5202
Adjusting the Temperature
- Turn on your chiller.
- Press SET to enter the setting mode.
- Use ▲ and ▼ to modify the desired water temperature.
- Press RST to save and exit.
- Press SET to exit without saving. If no activity is detected for 20 seconds, the setting mode will also exit without saving.
The set temperature will be displayed on the lower readout, and the chiller will bring the actual water temperature to that level over time.
Restoring to Factory Settings
While the chiller is in the standby mode, press and hold ▲ and ▼ until "rE" is displayed. All settings have now been restored to their factory defaults.
Dissipating the Bubbles
When the pump starts operating, you might initially notice some air bubbles, which should dissipate within a minute or two.
If air bubbles persist in the water-cooling system, do as follows:
- Initiate the chiller to circulate the water.
- Monitor the air bubbles in the laser tube until all bubbles are eliminated or until the diameter of any remaining bubbles is less than 2 mm.
- Stop the chiller or proceed with your engraving.
Alarm
Alarm Display
When an alarm occurs, the display will alternate between the target water temperature and one of the error codes below. There will also be a separate alarm if the chiller senses an insufficient water flow.
The alarm noise can be muted by pressing any button on the control panel.
| E1 | E2 | E3 | E4 | E5 |
|
Overheated room temperature |
Overheated water temperature |
Overchilled water temperature |
Room temperature sensor failure | Water temperature sensor failure |
Error Codes
When alarms occur, an error code will be displayed as above. The alarm noise can be muted by pressing any button on the control panel.
| Error Code | Problem | Solution |
| E1 | The ambient room temperature is too high. | Reduce it or cease work. |
| E2 | The water temperature is too high. | Cease work and replace or cool it. More refrigerant may be needed. Other problems which might exist include obstructed air flow from a clogged filter or inadequate space around the chiller's vents, an unstable power supply, an excessive heat load from the machine being cooled, or a poor parameter configuration. |
| E3 | The water temperature is too low. | Cease work and replace or heat it. |
| E4 | The room temperature sensor has malfunctioned. | Cease work and repair or replace it. |
| E5 | The water temperature sensor has malfunctioned. | Cease work and repair or replace it. |
| E6 | The water flow has a problem. | Cease work and check for low water, obstructions, or a pump malfunction. |
Flow Alarm Wiring Diagram
|
Display Condition |
Normal Flow Indicator | Flow Alarm Indicator | Buzzer | H1/H2 Output | H1/H3 Output |
| Normal | On | Off | None | Off | On |
| Blocked Pathway | Off | On | Buzzing | On | Off |
| Water Shortage | Off | On | Buzzing | On | Off |
| Faulty Pump | Off | On | Buzzing | On | Off |
| Power Interruption | NA | NA | NA | On | Off |
Note that the flow alarm is connected to relay contacts requiring that the operating current be less than 5 A and working voltage less than 300 V.
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