LiftMaster HDSW24UL Installation Manual - English - Page 41

MAINTENANCE Maintenance Chart Disconnect all power (AC, solar, battery) to the operator before servicing. DESCRIPTION TASK CHECK AT LEAST ONCE EVERY Entrapment Protection Devices Warning Signs Manual Disconnect Sprockets and Chain Gate Accessories Electrical Chassis Mounting Bolts Operator Diagnostic History Batteries Check and test inherent (built into the operator) and external devices for proper operation Make sure they are present and replace if worn or broken, see Accessories Check and test for proper operation Check for excessive slack and lubricate Inspect for wear or damage; ensure it still complies with ASTM F2200, see page 6 Check all for proper operation Inspect all wire connections Check for tightness Inspect for wear or damage Review diagnostic history for identification of intermittent problems Replace MONTH 6 MONTHS 3 YEARS X X X X X X X X X X X NOTES: • 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 is within ten percent of the operator's rating. Batteries Batteries will degrade over time depending on temperature and usage. The operator alarm will beep 3 times with a command if the battery is low. Batteries do not perform well in extremely cold temperatures. For best performance, the batteries should be replaced every 3 years. Use only LiftMaster part 29-NP712 for replacement batteries. The batteries contain lead and need to be disposed of properly. The operator comes with two 7AH batteries. Two 33AH batteries (A12330SGLPK), with battery harness model K41-0102-000 (not provided), may be used in place of the 7AH batteries. 33AH batteries are NOT compatible if transformer kit model 3PHCONV is installed. 41