Specifications

MARATHONNORCO AEROSPACE, INC.
NICKEL-CADMIUM AIRCRAFT BATTERIES
24-34-00
Page 1301
MAY 10/11
13.0 TROUBLE-SHOOTING
TROUBLE-SHOOTING HINTS
TROUBLE PROBABLE CAUSE CORRECTIVE ACTION
APPARENT LOSS OF
CAPACITY
Very common when recharging on a
constant potential bus, as in aircraft.
Usually indicates imbalance between
cells because of difference in
temperature, charge efficiency, self-
discharge rate, etc., in the cells.
Electrolyte level too low. Battery not
fully charged.
Use of unapproved cells and/or
components.
RECONDITIONING WILL ALLEVIATE
THIS CONDITION.
CHARGE. ADJUST ELECTROLYTE
LEVEL. CHECK AIRCRAFT VOLTAGE
REGULATOR. IF O.K., REDUCE
MAINTENANCE INTERVAL.
REPLACE WITH APPROVED PARTS.
COMPLETE FAILURE TO
OPERATE
Defective connection in equipment
circuitry in which battery is installed -
such as broken lead, inoperative
relay or improper receptacle
installation.
End terminal connector loose or
disengaged. Poor intercell
connections.
Open circuit or dry cell.
Use of unapproved cells and/or
components
CHECK AND CORRECT EXTERNAL
CIRCUITRY.
CLEAN AND RETIGHTEN HARDWARE
USING PROPER TORQUE VALUES.
REPLACE DEFECTIVE CELL
REPLACE WITH APPROVED PARTS.
EXCESSIVE SPEWAGE OF
ELECTROLYTE
High charge voltage
High temperature during charge
Electrolyte level too high
Loose or damaged vent cap
Damaged cell and seal
CLEAN BATTERY, CHARGE AND
ADJUST ELECTROLYTE LEVEL.
CLEAN BATTERY, TIGHTEN OR
REPLACE CAP, CHARGE AND ADJUST
ELECTROLYTE LEVEL
SHORT OUT ALL CELLS TO 0 VOLTS,
CLEAN BATTERY, REPLACE
DEFECTIVE CELL, CHARGE AND
ADJUST ELECTROLYTE LEVEL.