5: Maintenance
5-4 PRC-BC4-MS
Reverse Current
Protection
1. Connect the 82 ohm resistor across the front panel DC input pins.
2. Measure the DC voltage across the 82 ohm resistor. It should be
0.0 ±0 VDC.
DC Input Circuitry
Check
1. Disconnect the AC input power source and connect the DC input
power source.
2. Adjust the DC supply voltage to between 20 and 30 VDC.
3. Verify that the charger is working normally by performing the
previous checks (exclude the reverse-current protection check) on
charging station
BATT 1.
Chassis Over-
Temperature
Protection:
1. Remove the PRC-BC4 chassis from the case (refer to “Power
Configuration” on page 2-1).
2. Use a heat source such as a heat gun or torch to heat the thermostat
until it trips.
3. Check that the PRC-BC4 shuts off until the thermostat trips back on.
This concludes the functional test. If the PRC-BC4 failed any of the previous
steps, refer to “Troubleshooting” below.
5.2 Troubleshooting
5.2.1 Index to Test Procedure
If the PRC-BC4 fails a test procedure, Table 5-1 refers to a specific place in
the troubleshooting procedure.
Table 5-1 Troubleshooting Index
Failed Test Section Troubleshooting Section
“Charging Circuit Check” on
page 5-1
Refer to “Current Source” on page 5-5.
“DC Current Check” on page
5-2, step 2
Refer to “Bulk Charging Current Regulation” on
page 5-6.
“DC Current Check” on page
5-2, step 3
Refer to “Current Source” on page 5-5.
“DC Output Check” on page
5-3
Refer to “Float Charge Voltage” on page 5-6.
“Reset Circuit Check” on
page 5-3
Refer to “Reset Function” on page 5-6.
“Overcharge Voltage Check”
on page 5-3
Refer to “Overcharge Voltage” on page 5-7.
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