TABLE 4-2. TROUBLE ANALYSIS CHART
All circuit breakers are turned
off and all switches are turned
off. One man is stationed at each
of the four radome guy cables to
stabilize radome during inflation
and the blower inlets are open.
Position the RADOME POWER
Power will be applied to the
a) Check input power
circuit breaker, CB1, on the
open contacts of all contactors
b) Check interconnecting cables
in the radome box.
to the ON position.
Position the BLOWER selector
K1 in radome box closes,
a) Check pressure switch S3 and
K1 if B1 fails to operate
Control Power Supply to the
b) Check rotation of the blower;
if it rotates in the wrong direction,
reverse phase A and B,
phase A and C, or phase B
and C. Reversal of any two
phases will reverse the direction
of the motor. Check
The blower will operate in either direction; however, it is more efficient in one direction than the other. Radome inflation time
should be approximately 5 minutes. If it is much longer, blower is probably running in wrong direction.