ASCO 4ATE, 4ACTE, 4ADTE, 4NTE, 4NCTE, 4NDTE
Installation Manual
Page 16
ASCO Power Technologies
381333-445 B
Testing & Service
Transfer Test
Operate the transfer switch at least once a
month by following the
Electrical Operation
procedure on
page 6.
Lamp Test
Use the
Lamp Test
button to check the lights on the
Bypass
& Isolation Status
panel. All lights should come on when
this button is pressed. Do not hold the button more than 3
seconds. If the button is held for more than 3 seconds the
panel will enter into service diagnostic mode The panel will
revert to normal operation after 30 seconds. An ASCO
Services technician uses this button for diagnostics.
Preventive Maintenance
Reasonable care in preventive maintenance will insure high
reliability and long life for the transfer switch. An annual
preventive maintenance program is recommended.
Replacement Parts
When ordering replacement parts provide the Serial No., Bill
of Material No. (BOM), and Catalog No. from the transfer
switch nameplate. In the US call 800-800-2726 (ASCO) or
contact customercare@ascopower.com.
Yearly Inspection
Hazardous voltage capable of causing shock,
burns, or death. Deenergize both Normal &
Emergency power sources before performing
inspections!
Clean the enclosure.
Deenergize all sources, then brush
and vacuum away any excessive dust accumulation. Remove
moisture with a clean cloth.
Inspect the transfer switch contacts.
Deenergize all
sources, then remove the transfer switch barriers and check the
contact condition. The non-replaceable main contacts are
designed to last the life of the transfer switch. Reinstall the
barriers carefully.
Maintain transfer switch lubrication.
Under normal
operating conditions no further lubricating is required. Renew
factory lubrication if the transfer switch is subjected to severe
dust, abnormal operating conditions, or if the TS coil(s) is
replaced. Order lubrication kit 920799.
Check all cable connections & retighten them.
Torque to values shown on the transfer switch label.
