Specifications

69
DPX Amplifier Error Codes
The APX2180, APX4360, DPX1800 and DPX11500 amplifiers feature computer controlled on-board diag-
nostics. The chart below outlines the error message and the cause of the message.
Amp Illumination Red End Panel LED Blue End Panel LED Cause
ON OFF OFF Amplifier Operating Normally
ON FLASHING FLASHING Thermal Protection
SLOW FLASH FLASH OUT OF SYNC OFF Input Voltage Overload
FAST FLASH FLASH IN SYNC OFF Short Circuit Detection
3 FLASHES THREE FLASHES OFF Repeated Short Circuit
Problem: Amp is in thermal protection mode
Solution: - Shut off system and let amp cool down.
- Check speaker load on amp, make sure it does not exceed specification
- Ensure adequate air space around the amplifier
- Ensure end panels (DPX amps) are not obstructed and limiting air flow
Problem: Input Voltage Overload
Solution: - Service vehicle electrical system (alternator and voltage regulator)
Problem: Short Circuit Detection
Solution: - Check speaker load on amp, make sure it does not exceed specification
- Check all speaker wires for short circuits
- Check all speaker wires for shorts to ground
- Replace speakers with known good units
Problem: Repeated Short Circuit
Solution: Resolve Short Circuit problem, disconnect amp for 15 minutes to reset.