TM 55-6670-200-14&P
Probable Cause
Corrective Action
Malfunction
Corrective Action
Probable Cause
Malfunction
Probable Cause
Corrective Action
Malfunction
Kit inoperative for dc use
Replace dc fuse in indicator.
DC fuse blown.
(ac functional).
Defective AC or DC selector
switch on power supply
Return to depot.
assembly.
Kit inoperative for ac use
Replace ac fuse in power supply
AC LINE fuse blown.
(dc functional).
assembly.
Repair or replace power source.
Power supply failure.
Kit inoperative
(power
R e p l a c e failed or doubtful tubes with
Tube failure.
sufficient).
spare tubes supplied in kit. Make sure all
tubes are secure.
Replace milliammeter.
Milliammeter
failure.
One or two cells cannot be
zeroed at NO LOAD
Cross cells (red cell in blue circuit) to de-
Cell failure.
condition.
termine whether trouble is in cable or
cell. If cell is defective, return kit to
depot.
Check continuity. Check phasing. Replace
Cable short (or open).
cable in field only in emergency.
Return kit to depot for recalibration and
Cell reads too high.
Open cell shunt resistor..
repair.
Cell erratic or intermittent
Cell damage.
under load.
Return kit to depot.
Cable damage.
Refer to d above.
Sensitivity bad on one or
two cells should be ap-
proximately 200 pounds
t o deflect needle from
zero to beginning of
green area on scale.
Capacitance change in cell
Return kit to depot for recalibration and
cable circuit.
repair.
Improper cable ground.
Check ground continuity on cables.
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