SECTION 2 TESTING & SERVICE
TRANSFER TEST
Operate the 7000 Series ATS at least once a month by following the
PREVENTIVE MAINTENANCE
Reasonable care in preventive maintenance will insure high reliability and long life for the 7000 Series ATS. An annual preventive maintenance program is recom- mended.
In the United States, ASCO Services, Inc. (ASI) is ASCO Power Technologies’s national service organization. ASI can be contacted at
In Canada, for service call
Checklist for Yearly Inspection
Hazardous voltage capable of causing shock, burns, or death is used in this transfer switch. Deenergize both Normal – Emergency power sources before performing inspections!
SClean the ATS enclosure. Brush and vacuum away any excessive dust accumulation. Remove any moisture with a clean cloth.
SCheck the transfer switch contacts. Remove the transfer switch barriers and check contact condition. Reinstall barriers carefully. The
SMaintain transfer switch lubrication. If the transfer switch is subjected to severe dust or abnormal operating conditions, renew factory lubrication on all movements and linkages. Relubricate the solenoid operator if the TS coil is replaced. Do not use oil; order lubrication kit
SCheck all cable connections & retighten them.
DISCONNECTING THE CONTROLLER
The harness disconnect plugs are furnished for repair purposes only and should not have to be unplugged. If the controller must be isolated, follow these steps:
Disconnecting the Plugs
Do not unplug the controller until step 1a. or 1b. below is completed.
1.Observe the position of the transfer switch.
a.If the transfer switch is in the Normal position, first place standby engine starting control in the off position. Second, then open the emergency source circuit breaker. Third, open the normal source circuit breaker.
b.If the transfer switch is in the Emergency posi- tion, first open the normal source circuit break- er. Second, place the engine starting control in the test or run position. Third, open the emer- gency source circuit breaker.
2.Separate the two quick disconnect plugs by squeez- ing the latches. Do not pull on the harness wires.
Reconnecting the Plugs
Do not reconnect the controller until step 1a. or 1b. below is completed.
1.Observe the position of the transfer switch.
a.If the transfer switch is in the Normal position, first be sure that both normal and emergency source circuit breakers are open. Second, be sure that the standby engine starting control is still in the off position.
b.If the transfer switch is in the Emergency posi- tion, first be sure that both normal and emer- gency source circuit breakers are open.
2.The two harness plugs and sockets are keyed. Carefully align the plugs with the sockets and press straight in until both latches click. Close the door!
3.Restore the two sources in sequence as follows:
REPLACEMENT PARTS
Replacement parts are available in kit form. When ordering parts provide the Serial No., Bill of Material No. (BOM), and Catalog No. from the transfer switch nameplate. Contact your local ASCO Power Technolo- gies Sales Office or ASI:
in United States call 1 800 – 800 – ASCO (2726) or in Canada call 1 800 – 234 – ASCO (2726)
a.If the transfer switch is in the Normal position, first close the normal source circuit breaker. Second, close the emergency source circuit breaker. Third, place the standby engine starting control in the automatic position.
b.If the transfer switch is in the Emergency position, first close the emergency source circuit breaker. Second close the normal source circuit breaker.
