The status of the External Transformer.
unknown(1) indicates the device status is unknown.
notInstalled(2) indicates the device is not installed.
ok(3) indicates the device status is OK.
fail(4) indicates the device status has failed.
lostComm(5) indicates the device has lost communication.
overtemp(6) indicates the device has an over temperature condition.
opened(7) indicates the circuit is opened.
closed(8) indicates the circuit is closed.