Installation
1-4 Manual # 42-02-2P26
Safety
Certain fundamental warnings must be kept in mind at all times to help avoid accidental death,
severe personal injury, or equipment damage.
Personal Safety
• Controllers may only be installed by qualified, licensed, trained elevator personnel famil-
iar with the operation of microprocessor-based elevator controls.
• Verify safety devices (limits, governors, hoistway locks, car gate, etc.) are fully functional
before running the elevator. Never operate controls with any safety device inoperative.
• The user is responsible for complying with the current National Electrical Code with
respect to the overall installation of equipment and proper sizing of electrical conductors.
• The user is responsible for understanding and applying all current local, state, provincial,
and federal codes that govern practices such as controller placement, applicability, wiring
protection, disconnections, over-current protection, and grounding procedures.
• Controller equipment is at line voltage when AC power is connected. Never operate con-
trols with covers removed from drive or brake controls.
• After AC power has been removed, internal capacitors can remain charged for up to 5 min-
utes. Wait at least 5 minutes after power down and check for live circuits before touching
any components.
• Verify no remaining voltage on the large inductor below the drive. Short to ground to dis-
charge if required.
• To reduce the risk of shock, all equipment should be securely grounded to earth ground.
Failure to obtain an actual earth ground may result in electrical shock to personnel.
• Provide equipment grounding in accordance with local code and NEC Article 250.
• When using test equipment (oscilloscopes, etc.) with a power cord that electrically ties
probe common to earth ground, an isolation transformer should be used to isolate the
instrument common from earth ground.
• Remain clear of all rotating equipment while working on the controls.
Equipment Safety
• Provide equipment grounding in accordance with local code and NEC Article 250. Failure
to obtain a true earth ground may result in electrical shock. Improper grounding is the
most common cause of electrical component failure and noise-induced problems.
• Replace components only with main line power off. Damage to equipment or unexpected
operation of the elevator may occur if this precaution is not observed.
• Do not substitute or modify parts. MCE will not be responsible for modifications made in
the field unless they are approved in writing by MCE.
• Circuit boards believed to be defective must be sent to MCE for repair and testing. Field
repair may leave the board with undetected problems.
• Care should be taken when using test leads and jumpers to avoid shorting high voltage or
ground to low voltage microprocessor circuits.
• Do not allow dust, carbon, or metallic particles to accumulate on any part of the control.
• Avoid vibration, shock, high humidity, high ambient temperature, and caustic fumes.
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