ABB Symphony Harmony Series, Instruction, Page: 223 / 402

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Preventive Maintenance Schedule
Table 9-1. Preventive Maintenance Schedule
Task Procedure Frequency
General cleaning. Use a lint-free cloth and mild, all-purpose, non-
flammable, commercial spray cleaner to remove dirt, fingerprints,
and grease from the equipment (e.g., LCD screen, keypad, hous-
ing assembly). Spray the cleaner on the cloth and not directly on
the equipment. N/A As required
Check cabinet air filters. Clean or replace them as necessary.
Check the air filter more frequently in excessively dirty environ-
ments. N/A 3 months
Check block faceplate and housing and the cooling fan assembly
for dust. Clean as necessary using an antistatic vacuum. Insure air
vents are free of dust and lint. N/A
Check all signal, power, ground, and cable connections associated
with the I/O system; verify they are secure. PR27
Complete all tasks in this table. N/A Shutdown