Shini Group
Technology & Marketing Dept
Issued by department: Date: Language: Document Name: Revision: Page:
Shini/CSC-TM
2013-11 zh-cn Shini product repair manual.doc
1.0 34 (62)
Catalog:
template:Standard_CN.dot; filename: Shini product repair manual; Printdate: 8/1/2014 1:58:00 PM; savedate: 8/1/2014 1:58:00 PM
1. Check the resistance between L1 and T1, L2 and T2, L3 and T3 through
multimeter before energized, the resistance should be infinite because the
contactor is in a off state; if resistance value is 0, indicating that a short circuit
in the contactor, the contactor needs to be replaced.
2. Energize point 2 according to the voltage labeling requirements in contactor:
a) The contactor is actuation state , if not indicating that internal contact
damage, need to replace contactor.
b) After contactor actuates, check T1, T2 and T3 voltage between any two
through multimeter, normally should be equal to the voltage L1, L2 and L3
between any two.
3. There are auxiliary contacts in some contactor to play the role of logical
control and circuit interlock. Auxiliary contacts marked as “NO” means
normally open, auxiliary contacts marked as “NC” means normally close.
You can check the auxiliary contacts through measuring the resistance
between two points:
After contactor actuates, resistance value is 0 between two points of auxiliary
contacts marked as “NO”, resistance is infinite between two points of auxiliary
contacts marked as “NC”, and vice versa.
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