Applies to

• Trendsetter 3244
• Platesetter 3244
• VLF Trendsetter
• VLF Platesetter

Description

Causes

Fault signals are asserted from within the drive amp when pin 7on J2 is below 0.8V. This signal is latched, but the exact cause of the failure within the amp is difficult to determine.

The green status led next to J2 on the drive amp is lit unless there is a servo amp fault.

• Motor overtemperature (red LED) [ VLF | 3244 ]
  The motor temperature input is not used, but is disabled by a jumper across pins 6 and 7 on J3. If this jumper or its connector pins are damaged, a motor over temperature will be issued and result in a servo amp fault. Note the over temperature results in the red LED between the servo amp boards and behind J2 being lit.
• Heat sink overtemperature (no LED, triggers at about 55° C or 131^o F) Amplifier hot to the touch
• Logic power failure or glitch or brownout (D6 off; latching)
  LED 6 indicates the drive amp logic power is ok, but the LED is not latched.
• Current fault or phase-to-phase short or phase-to-ground short
• (LED1 B+ overvoltage) Check main power to J1 is less than 260 VAC.
• Hall faults
• Power on or a reset can artificially cause the drum amp to report a fault which can be cleared with a drum init command
• Intermittent cable or connector to the servo amp.
• Current fault, phase-to-phase short or phase-to-ground short (LED 1). [ 3244 | VLF ]
• Ambient temperature outside of machine is outside of machine specifications:
  • 15-35 ^o C (59 - 95^o F) for Platesetters.
  • 17-32 ^o C (63 - 90^o F) for Trendsetters.

Solutions

Fault issued on power up or reset

Enter a drum init command.

Amplifier hot to the touch

Normal operating temperature of the heatsink is 55° C = 131° F

Replace amplifier.

Hall faults

Drive amp Hall LED test in General VLF drum drive, encoder, and PLL troubleshooting.
Proper LED sequence 3244
Proper LED sequence VLF

See also

• Main Drive Amplifier Internal Fault Conditions
• Photograph of the VLF main drive amp board and indicator LED layout.