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Page 74

CDi DriveCore Series Operation Manual

Troubleshooting

CONDITION: Power indicator and LCD are off.

POSSIBLE REASON

• The ampliﬁer is not plugged in to the power receptacle.

• The ampliﬁer has lost AC Power.

• The power supply fuse has tripped.

CONDITION: Power indicator is ashing blue indenitely.

POSSIBLE REASON:

• The AC line voltage has dropped below 10% or has risen above 10% of the nomi nal

line voltage of the power supply. See "System Protection" on page 72 for

information on AC under/over voltage protection.

CONDITION: When pressing the Power button, power won't turn on

and Power indicator ashes blue briey.

POSSIBLE REASON:

• The ampliﬁer is asleep via the Aux port (contact closure) circuit. See "Using the

AUX Port" on page 70

for more information.

Thermal fault displayed here

CONDITION: Thermal fault is indicated in the display.

POSSIBLE REASON:

• The ampliﬁer is becoming too hot for safe operation. Allow ampliﬁer to cool. Check

for loads less than 2Ω and for excessive input levels. Check for proper ventilation

and proper output mode (2/4/8Ω, 70V, 100V) set ting. See "Proper Cooling"

on page 2

for information on rack mounting and cooling. See "System

Protection" on page 72

for detailed information on thermal limits. See

"Conguring Output Modes" on page 15 for information on conﬁguring

the output mode.

Harman CROWN CDi DriveCore Series User Manual

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