SECTION 8– TROUBLESHOOTING
8.1 CONTROL WILL NOT “RUN” or “START”
• Verify there is a normally closed button or jumper between TB2-22 and TB2-24.
• Double check your control modes such as “LOCAL” and “REMOTE”.
• Check the “MENU K: SOURCE SELECT” to make sure the proper start sources are
programmed.
8.2 NO OUTPUT
• Verify you have a setpoint programmed. The setpoint is the top right line of the display.
• Verify the control says “RUN” on the top left line of the keypad. If it says “RUN0”, then there
is no setpoint reference.
• Disconnect the clutch coil leads from the EC 2000 (C1 and C2). Try to run the control with a
setpoint and measure the DC voltage on the TB1-C1 and C2 (where the clutch coil leads were
just connected). A high DC voltage should be obtained (over 90VDC). If not, contact
Dynamatic for a replacement board. If there is a voltage on those terminals, measure the
resistance of the clutch coil and compare to the value on the drive nameplate as it could be
a defective clutch coil.
• Check if Jumpers 11 and 13 are in the “A” position on the circuit board.
8.3 DRIVE RUNS AT FULL SPEED
• Measure the AC Tachometer Voltage on TB1-G1 and G2. One should see a voltage anywhere
from 30VAC to 60VAC. If no voltage is measured, verify the control is in the proper feedback
mode (speed, torque, etc) or replace the AC Tachometer Generator inside the drive. If an
AC voltage is indeed measured, check the mechanical unit to see if there is a lockup between
the drum and rotor. If your clutch rotates at full speed without the control being in “RUN”
mode, then there is a lockup between the motor and the clutch.
• Verify the “TACH PULSES/REV” setting in MENU A is correct.
8.4 FUSES BLOW
• Verify the EC 2000 is not underrated for the mechanical unit.
• Verify the right voltage is being applied at TB1-L1 and L2 (115VAC).
• Check to see if the clutch coil or brake coil is shorted.
• Verify incoming power is properly grounded.
• Disconnect the clutch and brake leads and try to power the control, if the fuses blow again,
the EC 2000 needs to be replaced if incoming power is assumed to be proper.
8.5 CANNOT CHANGE ANY SETTINGS
• Press F1,F2, and F3 on the keypad successively to unlock the keypad for access.
• Try resetting the EC 2000 by pressing “SW1” on the 15-1200-1 board or by removing all TB2
wires and placing a jumper between TB2-32 and TB2-29, then applying power.
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