Heliocol
Controller Power Loss or Intermittent Power Supply
Solar controller display is blank or intermittently turns off while pump continues to run.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Loose power connections at controller, Tripped breaker or blown fuse, Failing low-voltage transformer, Water intrusion into controller housing
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker before opening the controller. Verify absence of voltage with a tester.
- Check breaker and fuse: Reset any tripped breaker feeding the controller and replace blown fuses with the correct rating.
- Inspect wiring: Tighten all line and low-voltage connections at the controller terminals. Look for burned or discolored wires.
- Examine transformer: If the controller uses an external or internal transformer, test its output voltage. Replace if output is low or intermittent.
- Check for moisture: Look for condensation or water inside the controller housing. Seal conduit entries and replace gaskets to prevent future intrusion.
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Repair Difficulty
Medium
3/5
Required Part
Solar Controller Power Transformer
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