Cause : 10 Volts low comes when the control card voltage is below 10 V from terminal 50. Remove some of the load from terminal 50, as the 10 V supply is overloaded. Max. 15 mA or minimum 590 Ω. A short circuit in a connected potentiometer or improper wiring of the potentiometer can cause this condition.

Troubleshooting : Remove the wiring from terminal 50. If the warning clears, the problem is with the wiring. If the warning does not clear, replace the control card.