STAC Zero Halcyon
Normal Light Patterns
Speed Sensor:
The RED light blinks to indicate that the trainer senses the Spoke Magnet. If the RED light does not blink each time the Spoke Magnet goes by, make sure the Spoke Magnet is aligned with the tip of the Speed Sensor and adjust the Speed Sensor within 5mm10mm (¼”-½”) of the Spoke Magnet.
The GREEN light will come on when the wheel has stopped.
Bluetooth (BLE) connection:
When the trainer is connected to any device via BLE the GREEN light will pulse bright and dim. If the green light is solid, then the trainer is ready to pair with a new device.
Mode:
The GREEN light indicates that the trainer is receiving commands from a controlling app. If the GREEN light blinks on intermittently, the trainer is receiving commands from Sim Mode:
- - - - - -
If the GREEN light is on, and blinks off intermittently the trainer is receiving commands from Erg Mode or Resistance Mode:
___ ___ ___ ___ ___
Battery Power:
If the RED light blinks rapidly followed by the trainer turning off, your trainer is out of batteries.
If the RED light does not come on, even when the Spoke Magnet is properly aligned with the Speed Sensor, your trainer is likely completely out of batteries.
Charging:
When the trainer is plugged in to the micro-USB charging cable a red light beside the charging port will turn on to indicate that the trainer is charging, and turn back off again when the trainer
is fully charged.
Troubleshooting based on light patterns
The red light doesn't turn on when I pass the spoke magnet by the speed sensor.
- Make sure the Spoke Magnet is aligned with the tip of the Speed Sensor and adjust the Speed Sensor within 5mm10mm (¼”-½”) of the Spoke Magnet.
- The trainer may be completely out of batteries. Try charging it. Preferably use a wall outlet adaptor, rather than a laptop USB port.
- Check that the speed sensor is plugged in to the electronics all the way. Halcyon Upgrade Kits arrive with the sensor unplugged to prevent activation during shipping.
- Take the spoke magnet in hand, and pass it closely and rapidly by the sensor, even touching it. If this activates rapid blinking of the lights, see below.
The red light blinks rapidly, then turns off, and the trainer stops responding.
- The trainer may be out of batteries. Try charging it overnight.
- If you've recently attempted a firmware update, this light pattern may indicate you're stuck in firmware upgrade mode. See the article on troubleshooting firmware updates.
- If the trainer has been in storage, and charging it does not restore normal behaviour, try connecting to the trainer in STAC Control Panel. If the trainer shows up as "DfuTarg", try these steps to restore it: for Android, for iOS. This issue can occur when the batteries become over-discharged. To prevent it reoccurring, charge the trainer fully before putting it in storage.
STAC Zero Powermeter
| Red Light | Green Light | Meaning |
| Rapid blinking | Anything |
Nobody is riding, and the strain gauge is seeing force change. Note that this won't happen unless the trainer has been idle for 5 seconds. |
| Unchanging (on or off) | Slow blinking | The trainer is ready to ride |
| Unchanging (on or off) | Rapid blinking | The trainer is trying to detect which way is down. Wait 30 seconds until the green light stops blinking for maximum power-reading accuracy. |
| Toggling ON/Off | Anything | The spoke magnet just went by! |