INSTALLATION, OPERATING AND TROUBLESHOOTING INSTRUCTIONS FOR MODEL E12
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TROUBLESHOOTING
GENERAL INFORMATION
This troubleshooting guide should be used by trained service personnel or an experienced electrician.
CAUTION: Hazardous AC and DC voltages are present within the units' enclosure.
Equipment: The only equipment required is a multi-scale volt-ohm meter, and a standard tool kit.
Before setting up any complicated testing or jumping to any conclusions, give the unit a general
inspection. Check the following:
Check DC output cables, connections, battery type, and number of battery cells with charger rating.
Check unit specifications with customer order.
Check input connections, input voltage, and line breaker size.
Check for shipping damage, loose connections, broken wires, etc.
Certain failures can be caused by defective batteries and customer loads; make sure batteries and
loads are free from defects.
NOTE: If the problem is found to be located in the printed circuit boards, the board should be replaced.
No attempt should be made to repair circuit boards in the field.
Information you should have when calling in for troubleshooting assistance:
Equipment model number and serial number.
The actual AC input voltage.
The DC output voltage with and without battery.
Result of check of AC breaker and DC output fuse.
DC output amps when measuring the DC output voltage with battery and load connected to rectifier.
TROUBLESHOOTING CONSTAVOLT® BATTERY CHARGER AND POWER SUPPLIES
SYMPTOM
POSSIBLE CAUSE
PROCEDURE
Open AC input fuse
1. Incorrect AC input
1.
Compare AC input voltage with
voltage on unit's nameplate.
2. Shorted diodes
2.
See "Troubleshooting and Diode
Replacement Sheet"
Open DC output
fuse
1. Defective or wrong voltage battery
1.
Compare battery voltage with unit
nameplate.
2. Shorted connector
2.
Check with volt-ohmmeter
3. Shorted or reverse output
3.
Check with volt-ohmmeter
4. Shorted diodes
4.
See "troubleshooting and Diode
Replacement Sheet"
Charger will not taper to finish
rate
1. Defective battery
1.
Check for defective cells on battery.
2. Defective control panel
2. To check control panel, disconnect
and separate blue and black wires
going to pin one on the control
panel. If the unit shuts down, the
control panel may be defective.
TYPE(AC41)CONTROL PANEL:
SYMPTOM
Charger operates, but will not
charge battery
1. Defective power failure relay
1. Measure voltage from Pin 5 on control
panel to negative DC output
terminal. If voltage is zero, the
power failure relay may be
defective.
2. Defective control panel
2. To check control panel on units
(without a power stage) turn off unit
and disconnect 12 Pin connector
from AC41-2 Circuit Board, jump Pin
3 to 8 on connector. Power up unit
if unit goes to high rate, electronic
panel may be defective. Units with
Power Stage, disconnect 12 Pin
connector, power up unit.
