Wiring Procedure | Precautions and Fault finding procedure.

All wires should be properly fixed in the connector. There should not be any loose connection.
Single phase power for Micro-Processor card should be taken saparately and its power should be taken from main power supply board placed at the ground floor, not directly from T.P.N. placed in the machine room.
Try to place 3-phase wire separate from hoist-way wiring.
Earthing should be proper for panel.
S.P.P. & Overload relay must be in working condition. Never try to byass overload relay or S.P.P in any case. If there is some problem in S.P.P or Overload relay then replace the same with another new one.
Power should not be fluctuate very often. Deep fluctuations may create problem to working condition of Micro-Processor.

Check for 3-Phase & Single phase supply is O.K.
Check for reverse phasing of 3-Phase supply through S.P.P.
Check for over loading from over load relay.
Check all the fuses in the panel are O.K.
Check for interlock both in cabin side & landing side.
Check for emergency off supply is O.K. (Stop Button Supply)
Check the 5V DC & 12V DC supply is O.K.
Check the final safety (Neutral wire) link is O.K. i.e. 28-28 link.
Check that at any time there should not be two reeds are short circuited. Otherwise the lift will not start until you switch off the supply and restart the same.
In the controller there are 5V DC supply, 12V DC supply, 230 AC supply, 230V DC supply and 3-phase 415V supply. Be careful that never any two supply is mixed even for a moment. It may cause failure of micro controller.
Proper earthing to the controller is very must.