Troubleshooting Guide - Teledyne 7639-27 Maintenance Manual

PROBLEM
Battery has low capacity
Will not come up to full
charge.
Will not hold charge.
Battery life too short.
Q01-4000
COMPONENT MAINTENANCE MANUAL
8. LT VRLA TROUBLE-SHOOTING GUIDE
CAUSE
Battery is at end of life.
Battery has not been charged
correctly
Aircraft charging voltage may be
lower than required for application.
Flight legs too short to charge the
battery sufficiently.
Battery held at high ambient
temperatures
Equipment left on accidentally,
battery is discharged.
Loose connections; corrosion
Quick disconnect worn beyond
tolerance.
Battery could be shorting under
load.
Battery could be self-discharging
due to low state of charge.
Sulfation can build up – based on
repeated undercharge situations –
or
Excessive sulfation build-up
caused by leaving the battery in a
discharged state for an extended
period of time.
Possible excessive use of starter
and other electrical equipment.
Application.
Charging variations such as
overcharging or chronic
undercharging brought about by
short flights.
Rev G
RECOMMENDATIONS
Replace battery.
Refer to Section 5 for charging options
Contact Aircraft Technical Support for
assistance.
Remove the battery from the aircraft and
recharge when necessary.
Remove battery from aircraft, recharge as
required.
Recharge per Section 5; if deeply
discharged, follow Section 6.3.
Clean and neutralize connections; tighten all
connections
Check Cannon or Elcon type connectors for
good contact (see 7.2) with Teledyne Go-
NoGo gauge part number 3600-51.
Perform airworthiness test per Section 6.2
Recharge per Section 5; if deeply
discharged, follow Section 6.3.
Remove and recharge the battery; reduce
equipment load or use an approved higher
capacity battery.
Ensure that battery selection is correct for
the application.
Infrequent flying will lead to gradual
discharge of battery, especially if the breaks
between flying are over three weeks. Please
review directions under Managing Periods
of Non-Use under SERVICE.
Ensure battery is not subjected to excessive
vibration or high temperatures in service.
Overcharging could be eliminated by
inspecting and correcting charge voltages.
Excessive undercharging (very short flights)
should be compensated by periodic
charging of battery.
Page 18 of 28 Teledyne Battery Products