TM 11-6130-227-40
Corrective
measure
Symptom
Probable
cause
Check
K4(K3)
(para
and
Relay K4(K3) defective . . . . . . . . . . . . . . .
No
dc
output
with
BATTERY
VOLTS
3-10); (para 3- 12) if defective.
BATTERY VOLTS switch S2 defective. .
switch
S2
in
24
position;
output
with
Replace
BATTERY
VOLTS
switch
S2
BATTERY
VOLTS
switch
S2
in
6
or
12
position
satisfactory.
Replace
CHARGE
SWITCH
S1
(para
CHARGE SWITCH S1 defective. . . . . . .
Charging
rate
does
not
increase
when
3-12).
CHARGE
SWITCH
S1
is
advanced
to
Med
and
HIGH.
Battery
charger
operating
but
M2
Check
connections
of
M2
to
M2
disconnected
or
defective.
.
shunt
resistor
R1;
replace
M2
does not indicate any dc output.
(para 3-12) if defective.
Battery
charger
stops
whenever
40-ampere
Check
circuit
breakers
CB2
and
CB3;
re-
Circuit breaker CB2 or CB3 defective. . . .
charging
rate
is
exceeded
during
6-
or
place
defective
circuit
breaker
(para
12-volt
charging.
3-12).
TIME
SWITCH
M1
does
not
return
to
Clock
of
TIME
SWITCH
M1
Replace TIME SWITCH M1 (para 3- 12).
SLOW
CHARGE
position
defective
Charging rate does not drop into slow-charge
TIME SWITCH M1 defective. . . . . . . . . .
Replace
TIME
SWITCH
Ml
range
where
TIME
SWITCH
M1
returns
to
SLOW
CHARGE
position.
Reactor L1 defective . . . . . . . . . . . . . . . . .
Check
reactor
L1
replace
(para 3-12) if defective.
Maximum
charging
rate
in
fast-charge
Rectifiers CR1 and CR2 aged for defective
Check
rectifiers
CR1
and
CR2
(para
range
cannot
be
obtained.
3-9b);
replace
rectifier
assembly
if
unsatisfactory.
Troubleshooting
Chart
(PP-1660B/G)
procedures
are
the
same
as
described
for
PP-1660/G.
Other
than
the
ac
input
circuits,
troubleshooting
Symptom
Probable
cause
Corrective
measure
Blower
does
not
operate,
indicator
lamp
not
POWER SWITCH S3 defective . . . . . . . .
Replace
POWER
SWITCH
S3.
lighted, no output.
Blower
does
not
operate,
indicator
lamp
Interlock safety switch S4 defective. . . . .
Replace safety switch S4.
lighted,
output
satisfactory.
Output
satisfactory,
blower
operates,
indica-
Neon lamp DS1 defective. . . . . . . . . . . . . .
Replace neon lamp.
tor
lamp
not
lighted.
Winding
Terminals
volts
Secondary
6-8
15.0
WARNING
6-7
7.5
Be
extremely careful when
making
9-11
15.0
v o l t a g e measurements. Use insulated test
9-10
7.5
probes and do not touch any internal part
NOTE
of the battery charger while it is
The voltage values given in the chart
energized,
a b o v e and based on a 115-volt ac input.
If the ac input voltage is above or below
a. Transformer T1. With the battery charger
this value, the voltages across the several
operating
in
the
fast-charge
range
and
the
windings of transformer T1 will vary
CHARGE SWITCH at LOW (the BATTERY
proportionally.
VOLTS switch may be in any position), the voltages
shown in the chart below should be obtained at the
b. R e c t i f i e r s C R 1 a n d C R 2 . W i t h
the
battery
terminals indicated.
charger operating in the fast-change range, the
volts
Winding
B A T T E R Y VOLTS switch at 12, and the charging
Terminals
Primary
1-5
115
r a t e adjusted to 75 amperes, measure the voltage
106.5
2-5
across each leg of rectifiers CR1 and CR2. The
3-5
99.0
difference between the highest and the lowest
4-5
93.0
voltage reading obtained should not exceed 0.3 volt.
