Wayne Kerr AP10030, Руководство пользователя и обслуживания

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42 Wayne Kerr AP 1kW Power Supplies • Issue 2
9. MAINTENANCE
9.1 Cleaning
Fan Filter
The fan filter should be removed and cleaned every three months (more frequently in
dusty environments). This prevents the filter becoming blocked which would cause the
overtemperature trip to shut the power supply down. To clean the filter proceed as
follows:
a) Switch the input to the power supply off.
b) Remove the fan grill by releasing the two quick release fasteners.
c) Remove the filter and shake off loose dust.
d) Wash the filter in a mild detergent solution.
e) Rinse and dry thoroughly before replacing.
f) Replace the fan grill before switching the power supply on.
Other Surfaces
The body of the power supply can be cleaned with a damp lint free cloth. Should it be
required, weak detergents can be used. No water should enter the power supply. If the
insides of the unit become clogged with dust a service will be required, do not attempt to
wash down internal parts.
9.2 Safety Checks
Each year the unit should be given a simple safety check.
Equipment required:
25A Earth bond tester (e.g. Megger PAT 2)
Insulation tester @ 500V D.C. (e.g. Megger BM 7)
Tests
1. Inspect the unit for dents or missing parts which might pose a threat to the units safe
operation. Look for any signs of overheating or evidence that foreign objects might have
entered the unit. Check the condition of the mains cable.
2. Earth bond. Ensure that 25A D.C. can flow from exposed metal parts of the unit to
earth with an impedance of less than 100m
Ω .
3. Insulation test at 500V D.C. the input (LIVE & NEUTRAL) to earth and the output
(Wired together) to earth and the input to output. Readings of greater than 1M
Ω are
acceptable.