IAI America XSEL-QX - Manual (Page 6)

CAUTION
Drive-source Cutoff Relay Error (Detection of Fused Relay: E6D)
Because of their circuit configuration, XSEL-PX controllers of single-phase, standard specification are the
only class of controllers that may generate a “drive-source cutoff relay error (E6D),” notifying fusion of an
internal relay, when the time after the power is turned off until it is turned back on (= until the power is
reconnected) is too short.
Although the specific time varies depending on the input voltage and number of external regenerative
resistance boxes being connected, as a guide wait for at least 40 seconds before reconnecting the power.