Kone MX20 - Check Contactors in Controllers and Drive Units; Check Relays in Controllers and Drive Units; Controllers and Wiring

KONE Maintenance Method
MX10 / MX20 MCP Procedures - ASME A17.1-2013 / CSA B44-13
© 2014 KONE Corporation PSK8-604-MX10/MX20
All rights reserved.
18 (-) 2014-12-15
8.6.1.6.3 (a)(b)(c): Controllers and Wiring
Procedure Note
Clean the interior of the control panel as
necessary.
Remove all spare parts and other foreign
matter that could possibly interfere with
operation of the equipment.
Check for temporary wiring and insulators or
blocks in the armatures or poles of any
magnetically operated switches, contactors or
relays.
Remove, if present.
Check to ensure that any temporary jumpers have
been removed.
Jumpers must not be left in machine rooms
or control spaces.
8.6.1.6.3 (d): Check relays in controllers and drive units
Procedure Note
• Check contact surfaces for excessive burning
and wear.
• Check contacts for proper wipe and
alignment.
•
Check relay armatures and
Christmas tree
stems for free movement and proper seating.
•
Check operation of reverse phase
relay; relay
must drop with loss of power.
•
Check coils for signs of overheating.
• Check to ensure contact arc shield blowouts
are in place and are in good condition.
•
Check wire connections for
tightness.
• Check relay shunts for wear.
• Check to ensure proper relay mounting.
Clean, lubricate, adjust or replace
components as required.
8.6.1.6.3 (d) Check contactors in controllers and drive units
Procedure Note
Check contactors for the following conditions:
• Binding
• Obstructions
• Carbon buildup
• Proper air gaps
• Contact pressure
• Contact wipe
• Excessive burning and wear
• Proper mounting
Clean, lubricate, adjust or replace
components as required.