DC CIRCUIT CHECKOUT PROCEDURE
!
CAUTION:
No AC power should be applied to charger during DC circuit checkout procedure.
Charger needs battery voltage to turn on. Set meter to read DC voltage.
ACTION
MEASURE
IF
THEN
Step 1 – Attach positive and negative test leads
of meter to appropriate battery system
receptacle - (positive to positive and negative
to negative). Measure voltage.
Measure
Voltage
1.70vpc-
2.16vpc
No
Check wiring
Step 2 – Remove the charger cover.
Step 3 – Place negative test lead of meter
where negative (black) DC cable connects to
the shunt. Place positive test lead of meter
where positive (white or red) DC cable
connects to DC circuit breaker or fuse.
Step 4 – Plug DC connector into receptacle.
Measure voltage and unplug.
Measure
Voltage
1.70vpc-
2.16vpc
No
Check DC plug or
connection to
receptacle
Step 5 - Keep negative test lead as located in
Step 3. Move positive test lead to other side of
the circuit breaker or fuse.
Step 6 - Plug DC connector into receptacle.
Measure voltage and unplug.
Measure
Voltage
1.70vpc-
2.16vpc
No
Replace circuit
breaker or fuse
Step 7a - Keep negative test lead as located in
Step 3. Move positive test lead to the longer
stem (cathode) of one SCR.
Step 7b - Plug DC connector into receptacle.
Measure and unplug.
Step 8a - Keep negative test lead as located in
Step 3. Move positive test lead to the longer
stem (cathode) of the other SCR.
Step 8b - Plug DC connector into receptacle.
Measure voltage and
unplug.
Measure
Voltage
1.70vpc-
2.16vpc
No
Check connections
from SCR to circuit
breaker or fuse
