Troubleshooting
31
2. If tightening the belt is not effective, stop the motor by hand (minimal amount of pres-
sure is usually required) so that DCL is generated. Set lower values for door closing
torque parameters (reduces full close torque to reduce slippage).
IF… DCL is generated but Pr is not displayed:
1. Check connections between main board and programmer board.
Learn Process
If the first closing of the doors was completed correctly and DCL is active, the learning process
can be executed:
1. With “Lr” displayed, press ENTER.
Doors should reach full open position, then reverse and reach full close position. During this
process, it is important that doors open to their maximum width and close completely (includ-
ing additional movement the motor may make when doors are fully closed).
Completing the learn process is required for proper operation.
IF… You press ENTER and learning does not begin:
1. More than likely, DCL was not generated. Give close command again until DCL is gener-
ated.
IF… During opening, doors stop and reverse before reaching full open, the “C1” parameter
may be set too low or there is too much friction:
1. Ensure that doors move freely.
2. If possible, access programmer board and change value of parameter “C1” (DCL must be
generated) and repeat learning process.
3. If it is not possible to access the programmer board and change parameter “C1” because
DCL was not generated, cycle power and repeat procedure beginning with learn process.
4. Change the value of “C1” and repeat learning process.
IF… During opening, doors reach full open and push up against bumper but do not
reverse, there is probably slippage somewhere in the mechanical transmission system and the
motor is still turning while doors are stopped:
1. If possible, stop motor by hand. Doors should now reverse and close. If not, turn off
power and attempt to open doors again.
2. Check the mechanical transmission system, tighten belts.
3. Repeat start up procedure. If problem persists, cycle power and repeat procedure begin-
ning with first closing of the doors. After this, reduce value of “C1” and “Co” and execute
learning process.
4. Repeat until correct values for “C1” and “Co” are found.
Multiple parameters affect closing torque. Please refer to “Inverter Drive Parameters” on
page 20.
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