Description
Fault 1, also known as the FILL fault, is the most common fault encountered by users. If you experience this fault it means the unit has exceeded its expected runtime.
Causes
Listed below are the most likely causes of this fault from most to least frequent.
1. Incorrect control box configuration
Your Water Witch may have been installed with settings that don’t match the conditions for your particular site.
- Check the LCD screen and determine if the volume and tank type are accurate for your specific application.
- Set the correct volume and tank type if required (see Setting tank type and volume).
The Water Witch features a fail timer that is activated when the unit operates continuously in FILL Mode for an hour for every 10,000L / 2500gal of volume.
The fail timer may activate before the unit stops filling if the set volume is insufficient. Check the set volume of the unit is correct for your site.
A guide to expected fail times is included in the table below.
| Volume | Time Until Fault |
|---|---|
| 10,000L / 2500gal | 1 hour |
| 40,000L / 10,000gal | 4 hours |
| 100,000L / 25,000gal | 10 hours |
| 200,000L / 50,000gal | 20 hours |
| 500,000L / 125,000gal | 50 hours |
2. Build-up of debris in sensor
Follow the guide Checking for debris in sensor.
3. Sensor unresponsive
Another cause for the runtime exceeding the maximum amount is a defective or damaged sensor.
Follow the guide Testing Water Witch operation.
4. Displaced water
This can occur if a sizable amount of water has been displaced from your tank or pool (e.g., excessive splash or evaporation, water pumped out for backwashing).
Water may also be displaced faster than the fill rate can accommodate over a prolonged period. This is particularly common on smaller bodies of water (e.g., spas and residential pools) which are used frequently or receive high traffic – such as during parties or gatherings.
Check the Runtime Log, clear the fault and monitor the unit.
5. Solenoid valve failure to open
The solenoid valve may have failed to open. This could be due to:
- No water supply.
- Supply pressure outside specified operating range.
- Damaged/faulty solenoid, or general wear-and-tear over several years of use.
See Issues with the solenoid valve.
6. Issue with balance line
Check your balance line for:
- Blockages such as plant matter, plastic, or small pool toys.
- Cracks in the PVC pipe causing leaks.
- Air locks preventing or limiting water movement.
Contact your pool builder or service technician if you believe there is an issue with the balance line.
7. Leak in the pool or tank
Test your pool for leaks by turning off the Water Witch. Observe changes to the water level over the next 24 hours.
If a leak is probable, call your pool builder or plumber.