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Maintenance

Regular escalator maintenance

Items checked	Checking time
Items checked	2 months one time	3 months one time	Yearly
Cleaning	X
Gap between the step and skirting	X
Comb plate	X
Steps	X
Steps chain	X
Handrail drive chain	X
Drive chain	X
Drive unit	X
Brake device	X
Safety device	X
Braking distance	X
Handrail		X
Main drive shaft			X
Handrail drive shaft			X

On December 29, 2008, the Minister of Ministry of Labor, War Invalids and Social Welfare issued the Decree No 66/2008/QĐ-BLĐTBXH on process of inspection for lifting equipment, escalator, elevator and hydraulic.

1. Process of inspection for lifting equipment (QTKĐ 001: 2008/BLĐTBXH)
2. Process of inspection for escalator (QTKĐ 002: 2008/BLĐTBXH)
3. Process of inspection for elevator and hydraulic (QTKĐ 003: 2008/BLĐTBXH)

Usage of the escalator

Before operating the escalator, check whether there is any foreign object at the position where comb plate locate at both upper and bottom of the escalator.
The escalator must be operated by competent or specical personnels, and be started under free loads.
Standing on the running escalator, passenger must face to the traveling direction, his two feet must be in the yellow line mark, and one of his hands must be on the handrail.
Small children must be held firmly by an adult while taking the escalator.
Bare-footed is not permitted to take on the escalator. Transportation of bulky and heavy loads is not permitted.
Use key operating the escalator, if the escalator can't run, chech whether the power switch is on or not, whether the main switch and maintenance lock on control box are on normal running position or not.
At the landing's entrance of escalator, a sufficient unrestricted area shall be available to accommodate passengers.
Sequence of operating the escalator: Check whether three phase mains is 380V or not and whether earthed wire and neutral wire is right or not. Close main switch, connecting main power and lighting power, connecting control circuit (220V) on main control box, turn key to the direction where the escalator is to be, wait a moment and pull out key after the escalator is running normally. While the escalator needs to be running in the reverse direction, stop the escalator by pushing the red stop button at first, then turn key to the other direction after the escalator has been stop absolutely.
If the escalator is not used for a long period, the main power should be cut, and the step chains, the handrail and the pressure belt should be loosen.
The step chains, handrail and the pressure roller should be tightened when the escalator is reused after been not used for a long period, and all of the safety switches should be checked carefully.

Elevator maintenance instruction

No	Items checked	Detailed checking items
1.	Machine room	Environment in the machine room Power Traction machine Cables Divertor puly Encoder Controller box Speed governor + cables ARD (Automatic Rescue Device)
2.	Car top	Environment in the car top Car top shoe Oil cup for guide rails Safety gear Rope attachment or car top puly Rope head of Governor U-D box of car top
3.	Shaft	Environment in the shaft CWT shoe,oil cup Rope head by CWT or CWT top puly Shaft bundle Flag arm and flag Limit switch arm and limit switch box Car guide rails, CWT guide rails
4.	Pit	Environment in the PIT Ladder for the PIT Secured fence at CWT area CWT Buffer Car Buffer Travelling cable Governor CWT Car bottom shoe
5.	Landing door	Door sill and toe guard Down skates Door rollers Door rails Door panel Doorlock and contact Key of landing door LOP (Landing Operation Panel)
6.	Car inner	Light Ceiling Ventilator COP (Car Operation Panel) Intercom Enmergency bell Door protection Door close force Car door