Nidec MCE iControl - Car;Counterweight Buffer Test; Car Buffer Test; Counterweight Buffer Test

Safety Tests
42-02-7223 C1 4-55
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iControl DC
3. On the Quattro DC Drive (if applicable), set A1-Overspeed Mult (percent) = the same
percentage of overspeed as the test Speed and set U4-Overspeed Test = Enable.
4. Select the Electrical Governor test (Safety Test tab). Complete on-screen instructions.
5. Place a car call distant enough to allow the car to reach the necessary speed.
Car/Counterweight Buffer Test
This is a two-part test. The car buffer test verifies that the car striking the buffer will cause the
hoist motor to break traction (or the driving system to stall) and that the car buffer will auto-
matically return to its fully-extended state after having been fully compressed. The car is
arranged to run into the terminal landing without initiating any form of slowdown. Neither the
final limit switch nor the buffer switch should prevent full compression of the buffer.
Car Buffer Test
1. Be certain that the pit is prepared, buffers ready, full limit switches temporarily relo-
cated as needed to allow for full compression of the buffers, etc.
2. Place a full load in the car.
3. Position the car in the hoistway high enough to reach contract speed before reaching the
bottom landing.
4. Place a jumper between terminal 15B and the SAFH terminal on the iBox to bypass the
hoistway portion of the safety string (except for the final limit switches).
5. Select the Car/Counterweight Buffer test (View > Safety Tests). Follow instructions.
6. Set test Speed to Contract speed.
Caution
If reduced stroke buffers are in use, set the test “Speed” less than or equal to the rated
buffer speed.
7. Use the Inspection switches to run the car. If necessary, you may end the test and bring
the car to an emergency stop using the iBox Stop switch.The car must strike the buffer,
compress it fully, and either cause the hoist motor to break traction or the driving sys-
tem to stall.
8. Check the hoistway ropes to make sure they are still in their proper grooves before
attempting to move the car.
9. Move the connection point of the previously installed jumper from terminal 15B to the 3
bus in order to also bypass the final limit switches, then lift the car off the buffer at
inspection speed (normally accomplished after the inspector enters the pit to observe).
The buffer must return to full extension.
Counterweight Buffer Test
The counterweight buffer test verifies that the counterweight striking the buffer will cause the
hoist motor to break traction and that the counterweight buffer will automatically return to its
fully-extended state after having been fully compressed. The empty car is positioned near the
bottom landing and arranged to reach contract speed in the up direction. The test is comparable
to the car buffer test but performed in the opposite direction. If the counterweight has a gover-
nor, remember to jumper it out. Remember to remove jumpers when tests are complete.