6-28. INSTALLATION. Refer to Operator
and Organizational Maintenance Manual
full rated load.
and install the AC current meter.
4. Check meter indication, AC cur-
6-29. CONTROL CUBICLE.
rent meter should indicate 100 percent
and test ammeter should indicate 0.75
6-30. TEST ON EQUIPMENT.
amperes. Check indication at each phase
a. Symptoms and Isolation of Malfunc-
switch (S8), readings should be the same.
tion. A malfunction of the control cubicle
is usually indicated by the conditions des-
5. If current reading is incorrect
check wiring back to current source.
6-9, 6-15 and 6-24. If a malfunction
6. If current is correct remove
exists which is not traceable to those as-
AC current meter.
the wires comprising the control cubicle
b. Removal. Refer to Operator and
Organizational Maintenance Manual and
remove the AC current meter.
6-25. CLEANING. Clean the AC current
meter using a clean, lint-free cloth,
6-31. DISASSEMBLY. Refer to figure
moistened with an approved cleaning solv-
6-7 and disassemble control cubicle assem-
ent and dry thoroughly.
bly in the order of index numbers assigned.
Pay particular attention to the following:
6-26. INSPECTION. Inspect case for
evidence of cracks or tears and electrical
a. Loosen three captive studs (23) and
connector for security.
hinge open control box door (25).
6-27. TEST. Connect the AC current
b. Tag and disconnect wires of harness
meter to the test equipment as illustrated
(15) from components.
c. Refer to Operator and Organization-
al Maintenance Manual and remove com-
ammeter Ml reads 1 ampere. AC current
ponents from control box door (25), and
meter should indicate 133 percent load.
transducer from the box (36).
meter Ml reads 0.75 ampere. AC current
d. Remove the control box relay from
meter should indicate 100 percent load.
the rear wall of box (36).
e. Hinge (32) and receptacle (35) are
c. Remove test equipment. Replace
riveted to box (36) and should be removed
AC current meter if meter error is
only if damaged.
greater than 2 percent of full scale value.