American Magnetics 188CPS Point-Sensing Instrument - Manual (Page 24)

23
4 Troubleshooting
Power switch LED not on
1. Ensure that the instrument is energized from a power source of proper voltage.
Warning
If the instrument has been found to have been connected to an incorrect power
source, return the instrument to AMI for evaluation to determine the extent of
the damage. Frequently, damage of this kind is not visible and must be
determined using test equipment. Connecting the instrument to an incorrect
power source could damage the internal insulation and/or the ground
requirements, thereby, possibly presenting a severe life-threatening electrical
hazard.
2. Verify continuity of the line fuse, F1, located on the instrument printed circuit
board.
Warning
This procedure is to be performed only when the instrument is completely de-
energized by removing the power-cord from the power receptacle. Failure to
do so could result in personnel coming in contact with high voltages capable
of producing life-threatening electrical shock.
a. Ensure the instrument is de-energized by disconnecting the power cord
from the power source. Disconnect the power cord from the connector
located on the rear panel of the instrument.
b. Remove the instrument top cover and check the fuse F1 for continuity.
c. If the fuse is bad, replace with a fuse of identical rating.
Caution
Installing fuses of incorrect values and ratings could result in damage to the
instrument in the event of component failure.
d. Replace the fuse and securely fasten the instrument top cover. Reconnect
the power-cord.