KONE Maintenance Method
MX10 / MX20 MCP Procedures - ASME A17.1-2013 / CSA B44-13
© 2014 KONE Corporation PSK8-604-MX10/MX20
All rights reserved.
106 (-) 2014-12-15
3) Power the controller.
• From controller, stand positioned to observe movement of car (hoist ropes, drive sheave,
cab) and open main brake using either the electric brake release box or EBR. A successful
test is when the elevator does not move.
• Main brake should open and car should not move.
• If car cannot hold 125% load with emergency brake, brake must be checked and made
to hold 125% load before performing any further tests.
1) If emergency brake passes check, return connections to original state.
Relevel test with 150% load for Freight elevators with Class C2 loading
Perform this test only on Freight elevators designed for Class C2 loading.
1) With elevator loaded with 150% load, manually open the brake and allow elevator to drift 1 - 2 inches
(25.4- 50.8 mm).
2) Release the brake and allow elevator to relevel.
3) Elevator must relevel the 150% load, and hold the load at floor level.
125% Lower and Hold test
Prior to performing 125% lower and hold test, perform 125% load brake functional check and
verify each brake independently holds 125% load.
1) Move the elevator to an upper landing from where the car can accelerate down and reach
maximum speed.
2) Use switch 270 to put the car on machine room inspection while doors are still open.
3) Use switches 261 and 263 on LCECPU to inhibit landing calls and door opening.
Note: Overrides the 110% load limit and prevents doors from opening.
4) Load car with 125% of nominal load.
5) Check user interface menu 5-1. Menu should display about 125.
6) Put the car on automatic. The car may relevel.
7) Run car down to bottom floor. Note: Make sure car runs down and stops at bottom floor.
8) Slide CPU switch 263 to the right and open doors by registering "at floor" car call.
9) Remove test weights from car.
10) Check menu 5-1. Verify loadweigh reads 0% after test weights are removed, +/- 5%.
For additional information, refer to appropriate AM for loadweighing information.
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