Vertical Express LD-16 - Mechanical Safety; Power Unit Fluid System

Safety Precautions LD-16 Door Operator - Modernization
4 © Vertical Express
Electrical Safety
(continued) Printed Circuit Boards
Printed circuit boards may be damaged if removed or installed in the circuit
while applying power. Before installation and/or removing printed circuit
boards, secure all power. Always store and ship printed circuit boards in sepa-
rate static bags.
Mainline Disconnect
Unless otherwise directed, always Turn OFF, Lockout, and Tagout the mainline
disconnect to remove power from elevator equipment. Before proceeding, con-
firm that the equipment is de-energized with a volt meter. Refer to the Employ-
ees’ Safety and Accident Prevention Program Manual for the required
procedure.
When Power Is On
To avoid personal injury, do not touch exposed electrical connections or compo-
nents while power is ON.
Test Equipment Safety
Always refer to manufacturers’ instruction book for proper test equipment
operation and adjustments.
Buzzer-type continuity testers can damage electronic components. Connection
of devices such as voltmeters on certain low level analog circuits may degrade
electronic system performance. Always use a voltmeter with a minimum imped-
ance of 1 M Ohm/Volt. A digital voltmeter is recommended.
Mechanical Safety
See the Employees’ Safety and Accident Prevention Program Manual and
the Elevator Industry Field Employees’ Safety Handbook for mechanical
equipment safety information on installation and service.
Power Unit Fluid System
If working on the power unit fluid system, the static car weight is applying pres-
sure to the jack and valve system and this stored pressure is present at the
power unit.
Before working on any component of the power unit, do one of the following:
• Manually lower the car onto the buffers to relieve the stored pressure.
• Close the machine room oil line shutoff valve, and then release the power
unit pressure by momentarily opening the manual lowering adjuster
valve.