A36F - 3 PHASE - INSTRUCTIONS AND TROUBLESHOOTING
Page 14 of 21
5.
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.
12.2 SERVICE INFORMATION
Information you should have when calling in for troubleshooting assistance:
1.
Equipment model number and serial number.
2.
The actual a.c. input voltage.
3.
The d.c. output voltage with and without the battery.
4.
Result of the check of a.c. breaker and d.c. output fuse.
5.
The actual d.c. output current and voltage when measured with battery and load connected to
rectifier.
12.3 SYMPTOMS & CAUSES
12.3.1
A.C. Breaker trips.
Possible Cause:
1.
Wrong a.c. input voltage.
2.
The a.c. input taps on power transformer set incorrectly. (See schematic wiring diagram)
3.
An a.c. to d.c. short or a.c. or d.c. short to ground (see ground short circuit test).
4.
High d.c. output voltage.
-
4
Check battery voltage for proper number of cells.
-
4
Check control fuse on alarm interface board.
-
4
Float/Equalize voltage potentiometers not set properly. (See Float/Equalize adjustment procedure for
proper voltage setting.)
-
4
Disconnect battery and loads from rectifier output terminals, put F/E switch in the float position, and
apply a.c. input voltage to rectifier. If d.c. voltage raises above 2.5 v.p.c., circuit regulator assembly or
“informer” option may be defective.
5.
Check for shorted power diodes or diode modules (SD1). (See diode-troubleshooting page)
6.
H.V. shutdown improperly set, too low, “informer” option.
7.
Open gate or wire on triac TR-1.
12.3.2
Open D.C. Fuse.
Possible Cause:
1.
Shorted power diode or diode module (repair/replace as required).
2.
Shorted battery cells or customer equipment.
3.
Shorted output cables.
4.
Capacitors not precharged.
