When the Fault LED is lit and the Acure shows Fault 22 Tx_EmergStop_Fault the Inverter is reporting that its Emergency Stop / Emergency Shutdown feature has been activated.
If the secondary black and white CT Coil Cables (or CAT-6 extension) have been inserted into the P6 Emergency Shutdown Connectors + and – (as per below in the Red Box) then the Acure will be Shutdown by the short circuit connection of the CT Secondary Coil and it will show F22 Fault.
The correct connections for the CT are 3,4 of Strip Connector P2 (as per above in the Green Box) and Installers must be observant to ensure the correct connectors are used for their correct function.
Below is an image of P2 clearly showing CT 3,4 to the left in white lettering on PCB.
P6 is also shown for further clarity with 3,4 clearly marked as + and -
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