Protection System - Crown DCi 8 600N Operation Manual

Protection System

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. In addition, be sure that the load
connected to the amplifier is within 2 - 16 Ohm limit (4 - 16 Ohm Bridge Mono). If wiring is verified as correct and the fault condition persists, see Page 63 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.
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 DCi2|2400N, 4|1250N, 4|2400N, and 8|600N models 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. Maximum fan noise level of a DCi amplifier is 47 dBA.. The fans will pull air from the front of the amplifier to
the rear of the amplifier.
The following fault conditions cause the fan to turn on full speed.
• High Frequency fault
• DC fault
• Short circuit fault
• Thermal fault
• Rail fault
• After a fault, the fan will remain at full speed for at least 60sec
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.
page 50
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Operation Manual