4-46 Manual # 42-02-2223
Final Adjustment
3. Position the car in the hoistway high enough to reach contract speed before reaching the
bottom landing.
4. Place a jumper between the #3 bus and the SAFH terminal on the iBox to bypass the
safety string.
5. On the View > Safety Test tab, select the Car/Counterweight Buffer test. Follow on-
screen instructions.
6. Set the test Speed to Contract Speed.
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 by releasing ENABLE + UP or DOWN switches. The car
must strike the buffer, compress it fully, and cause the hoist motor to break traction.
8. For 2010 code compliance, continue to press ENABLE + UP or DOWN and verify that
within 15 to 20 seconds a “Loss of Position or Speed Indicator” fault is generated and
power is removed from the motor and brake. Verify that the fault is maintained over a
power cycle and is reset only by pressing FAULT RESET on the iBox.
9. Check the hoistway ropes to make sure they are still in their proper grooves before
attempting to move the car.
10. Lift the car off the buffer at inspection speed. (Normally accomplished after the inspec-
tor 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 governor, remember to jumper it out.
N0te: These tests may cause the load weigher to go out of calibration. Please refer to “Learning
Load Values” on page 4-33.
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