Kone MX20 - Page 79

KONE Maintenance Method
MX10 / MX20 MCP Procedures - ASME A17.1-2013 / CSA B44-13
© 2014 KONE Corporation PSK8-604-MX10/MX20
All rights reserved.
79 (-) 2014-12-15
7) EBR: Open the C01 connection to remove 230VAC from the EBR UPS.
• Manual brake release: Temporarily disable emergency brake release lever as follows to
keep manual release handle from opening emergency brake.
• MX10 and MX20 machines: Run screw (1) down completely on emergency brake. If
necessary remove nut (2).
8) Remove dynamic braking function by removing U and V motor leads from terminal block located
at top of controller. When 214 relay is available, manually pushing the relay also disables
dynamic braking function.
9) Unplug car encoder cable from XCT1 terminal on ADON2 board.
10) Unplug motor encoder input from XME1 connector on ADON2 board.
11) Turn on elevator power.
12) Pull XH2 connector on ADON2. This effectively opens the hoistway interlock circuit.
13) Press 270:U and 270:RB (safe) buttons.
• Emergency brake should pick.
WARNING! During following procedures, elevator will move rapidly when brake is opened. Be
prepared to release manual release lever if emergency brake does not drop and/or car does not
slow down after tripping governor electrical switch.
Do not allow elevator to run into overhead.
14) While holding in 270:U and 270:RB buttons and with emergency brake open, manually open
main brake by pulling manual release lever, or turn SWM key switch if EBR.
• Car will move up from bottom floor.
• Elevator should accelerate quickly and trip electrical overspeed switch on governor.
• Emergency brake should drop.
15) Continue holding main brake open using manual release lever or SWM on EBR.
• Emergency brake slows car.
• Faults 177 and 178 (and some others) appear.
Note: Test is successful if emergency brake drops and car retards.
16) Release manual release lever, or SWM on EBR, and 270:U button after emergency brake sets
and stops elevator.
17) Turn off elevator power.
18) Reset governor electrical switch.