# Troubleshooting | Problem | Possible Cause | Solution | | -------------------------------------------------- | ----------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | **Front Controllers not working** | Not turned on | Turn controller on by holding **Down** button for 3 seconds\* | | | Transformer issue | Check transformer to ensure 12V DC is output | | **EE Error** | Probes not plugged in | The Front Controllers will display EE and the alarm will sound if they are turned on when the temperature probe is not installed. Install the temperature probe or turn the controller off to clear the EE error | | **Front Controllers cycling on and off** | Time Delay issue | Set a time delay on one of the controllers - [adjust Parameter F6](https://docs.kegland.com.au/products/cooling-equipment/operation#parameter-adjustment) to any value other than 1 to do this | | | Pump Blockage | If the pumps are blocked due to contaminaints or ice build up in the reservoir this cn cause excessive power draw. Empty, clean and flush the reservoir then test again | | | Pump Faliure | If a pump has failed for some reason (for example, ice build up) this can cause power cycling. Turn each controller off by holding the down button for 3 seconds, then turn on one by one to isolate this. If the issue is isolated to one controller test that pump | | **Reservoir not reaching Set Point Temperature** | Thermal Loss | If the reservoir does not reach the Set Point Temperature when cooling, this can be due to thermal loss in the system. See [Checking System for Thermal Loss](#checking-system-for-thermal-loss) below | | | Insufficient Clearance | A minimum of 100mm clearance is required on each side of the glycol chiller to ensure adequate heat dissipation for the condensers. Move the unit into open space to improve cooling efficiency | | | Set Point may be incorrect | Check the [**Set Point Temperature**](https://docs.kegland.com.au/products/cooling-equipment/operation#set-point-temperature-or-fermentation-control) and adjust if needed. | | **Pumps not working** | Set Point Temperature not correct | The pumps will cycle on or off as called by the cooling relay of the front controller. If the ambient temperature is higher than the set point, the pump will activate. Check that the set point temperature is lower than the measured temperature | | | Temperature probe in wrong location | For the most accurate results use a thermowell in the fermenter wto insert the temperature probe | | | Faulty or blocked pumps | See above for troubleshooting steps | | **Heat Relay on but unit is not getting wram/hot** | No Heating Device installed | Refer to [Heating Relay Instructions](https://docs.kegland.com.au/products/cooling-equipment/fermentation-glycol-chiller-with-digital-control-or-4-pump-model-or-g40-or-user-guide/heating-relay-instructions) to install an (optional) heating device | \***NOTE**: The display will illuminate if the up button is pushed whether or not the controller is turned on. If the display immediately goes off this indicates the controller is not turned on. ### Checking System for Thermal Loss The cooling power of the Glycol Chiller is independent of the cooling power of the system - IE the system when connected to fermenter(s). For best results it is important to minimise thermal loss by insulating all lines and fermenters, running as short a line as possible, and ensuring inlets and outlets of cooling coils or jackets are correctly connected. If the Glycol Chiller is not cooling as expected, or if it is not cooling to the current set point, this can indicate that the thermal losses in the system are too great for the Glycol Chiller to overcome. To determine if this is an issue with the unit or if it is an issue with the setup it is important to test the cooling Power of the Glycol Chiller independently. To do this, the Glycol Chiller must be isolated from the fermenters and tubing connecting to the fermenters. We want to only test the cooling power of the reservoir. To do this, remove any existing tubing and run a short length of 10mm ID tubing from the outlet and linlet of each pump as below:

When disconnected, fill the reservoir with fresh glycol solution or with water. **NOTE: If using water do not set the reservoir temperature below 2° as this may cause freezing issues.** Make a note of the starting temperature - this will be the ambient temperature or thereabouts. Make a note of the time this reading is taken. Set the reservoir to 0°C (if using glycol) or 2°C if using water. Leave the Glycol Chiller to run, checking every 10 minutes to observe and note the temperature of the reservoir. When the set point temperature has been reached, make a note of the total time taken to reach this temperature. If the Glycol Chiller takes a long time to reach the set point temperature - in excess of 6 hours\* then there may be an issue with the Glycol Chiller preventing it from cooling effectively - see **Reservoir not reaching Set Point Temperature** Troubleshootiing above. \***NOTE**: This number is a guide only and external factors will play a part in performance. If the set point temperature is reached in a reasonable timeframe then it is likely that **any cooling issues are caused by thermal loss in the system**. To combat this, reduce the line length, check that the inlet and outlet are the right way round and insulate the fermenter(s). It is recommended to set the reservoir temperature to around -5°C when using glycol solution when crash cooling (for example)