Maintenance; Operator Maintenance; Important Safety Instructions - Chamberlain LiftMaster Professional SW420 Installation Manual

To reduce the risk of SEVERE INJURY or DEATH:
1. READ AND FOLLOW ALL INSTRUCTIONS.
2. NEVER let children operate or play with gate controls.
Keep the remote control away from children.
3. ALWAYS keep people and objects away from the gate. NO
ONE SHOULD CROSS THE PATH OF THE MOVING GATE.
AVERTISSEMENT
4. Test the gate operator monthly. The gate MUST reverse on
contact with a rigid object or stop when an object activates
the non-contact sensors. After adjusting the force or the
limit of travel, retest the gate operator. Failure to adjust
and retest the gate operator properly can increase the risk AVERTISSEMENT
of INJURY or DEATH.
5. Use the emergency release ONLY when the gate is
NOT moving.
ATTENTION
AVERTISSEMENT
DESCRIPTION
RPM Sensor (Hall Effect)
External Entrapment
Protection Systems
Gate Caution Signs
Manual Disconnect
Drive Chain
Sprockets and Pulleys
Gate
Accessories
Electrical
Frame Bolts
Total Unit
NOTES
1. Severe or high cycle usage will require more frequent
maintenance checks.
2. Inspection and service should always be performed anytime a
malfunction is observed or suspected.
3. Limit switches may have to be reset after any major drive chain
adjustments.
4 If lubricating chain, use only a proper chain lube spray or a
lightweight motor oil. Never use grease or silicone spray.
M A I N T E N A N C E

IMPORTANT SAFETY INSTRUCTIONS

TASK
Check for proper adjustment
Check for proper operation
Make sure they are present
Check and operate
Check for excessive slack and lubricate
Check for excessive slack and lubricate
Inspect for wear or damage
Check all for proper operation
Inspect all wire connections
Check for tightness
Inspect for wear or damage
WARNING
WARNING WARNING
6. KEEP GATES PROPERLY MAINTAINED. Read the owner's
manual. Have a qualified service person make repairs to
gate hardware.
7. The entrance is for vehicles ONLY. Pedestrians MUST use
separate entrance.
8. Disconnect ALL power BEFORE performing ANY

maintenance.

9. ALL maintenance MUST be performed by a LiftMaster
professional.
SAVE THESE INSTRUCTIONS.
10.
3 MONTHS
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ADVERTENCIA
ADVERTENCIA
5. When servicing, please do some "house cleaning" of the
operator and the area around the operator. Pick up any debris
in the area. Clean the operator as needed.
6. It is suggested that while at the site voltage readings be taken
at the operator. Using a Digital Voltmeter, verify that the
incoming voltage to the operator it is within ten percent of the
operators rating.
29
CHECK AT LEAST ONCE EVERY
6 MONTHS 12 MONTHS
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