Crown Audio DCi Series – Analog Input Models - Manual (Page 15)

DCi Series Power Amplifiers
page 15 Operation Manual
Thermal Indicator
If the amplifier becomes too hot for safe operation, the channel that is generating too much heat will be shut down until the temperature drops below the thermal limit. The
front-panel thermal indicator will illuminate at 80 degrees Celsius, indicating the onset of compression affecting the audio signal. The amplifier will continue to run in this
state until either the temperature is reduced to a safe operating range, or if the temperature continues to rise, the channel will shut off to protect itself above 98 degrees
Celsius.
Fault
The amplifier will enter a Fault state if the amplifier senses an unsafe condition. This protection is for both internal and external faults. It is critical to check all wiring to
and from the amplifier to ensure the fault is not caused by external conditions. If wiring is verified as correct and the fault condition persists, see Page 31 for servicing
information.
Auto Insertion High-Pass Filters
A 35 Hz high-pass filter is inserted automatically when a channel is selected for Hi-Z operation. The filter can be changed to a 70Hz high pass filter. Please contact Crown
Service Department for further information.
AC Under/Over Voltage Protection
If the AC line voltage drops below 10% or rises above 10% of the nominal operating voltage of the amplifier, the amplifier’s power supply turns off and the blue Power LED
flashes. The amplifier will turn back on when the AC line voltage returns to safe operating levels.
Fuse
A fuse (F1) located near the IEC power inlet protects the amplifier from excessive AC current draw. The fuse is field replaceable. Replace with same type fuse; LittelFuse 314
Series F20AH 250V. The 8|600 utilizes a resettable breaker instead of a fuse. Please contact Crown Service department for more information.
Fan-cooled Chassis
DCi Series amplifiers are cooled by quiet, variable speed fans. The fans will pull air from the front of the amplifier to the rear of the amplifier.
Universal Switching Power Supply
The DCi Series incorporates a new switching power supply designed for extremely high efficiency and high output power. The supply includes Power Factor Correction
(PFC), a Series Resonant Converter (SRC) and accepts AC supply voltages from 100 V~ to 240 V~. Microprocessor controlled diagnostic and control capabilities both
optimize performance, and enhance long-term reliability.
Protection System