Trouble Shooting - Bias

### bias disconnection

Symptom

• biasctrl is in state DISCONNECTED

Solution

• Do _RECONNECT_
• Send a command like _REQUEST_STATUS_
• Sometime the bias crate will disconnect again, do _RECONNECT_

Not Helping

• do not close or kill biasctrl

### OverCurrentStatus

Symptom

• when biasctrl ramped the voltage, it get in the state OVERCURRENT

Solution

• First try biasctrl/RESET_OVER_CURRENT_STATUS (maybe a few times)
• if it don't help try to ramp the voltage down
  • biasctrl/SET_GLOBAL_DAC 0

Not Helping

• do not close or kill biasctrl

### Status notReferenced

Symptom

• biasctrl is in state notReferenced

Solution

• start the Ramping again
  • biasctrl/START

Not Helping

• do not close or kill biasctrl