MOONEY INTERNATIONAL CORPORATION
M20V SERVICE AND MAINTENANCE MANUAL
Page
Date
21
MAR 2017
Rev Date
24- 39- 00 - TROUBLESHOOTING CHARTS
24- 39- 03 - BATTERY TROUBLESHOOTING
TROUBLE
PROBABLE CAUSE REMEDY
Discharged battery.
Battery worn out. Replace battery.
Improper charging rate setting. Reset charging rate.
Excessive discharging. Turn off some equipment when al-
ternator is not charging. Decrease
starter usage by using external
power, whenever possible.
Standing too long. Remove and recharge battery.
Equipment accidentally left on. Remove and recharge battery.
Impure electrolyte. Replace battery.
Short circuit (ground) in wiring. Check wiring.
Low charging rate. Adjust voltage regulator.
Cracked cell jars.
Loose hold- down bracket. Replace battery and secure firmly.
Frozen battery. Replace battery.
Compound on top of battery melts. Charging rate too high. Reduce charging rate by adjusting
voltage regulator.
Electrolyte runs out of vent plugs. Too much water added to battery
and charging rate too high.
Drain battery and keep at proper
level; adjust voltage regulator.
Excessive corrosion on mounting
surface.
Spillage from overfilling. Flush area with baking soda solu-
tion.
Leaking or clogged vent line. Repair or clean vent line.
Charging rate too high. Adjust voltage regulator.
Battery freezes.
Discharged battery. Replace battery.
Water added and battery not
charged immediately.
Always recharge battery for 1/2
hour following addition of water in
freezing weather.
Leaking battery case. Frozen electrolyte. Replace battery.
Reversed battery polarity. Cables connected backwards on
battery or charger.
Battery should be slowly dis-
charged completely, then charged
correctly & tested.
Excessive water consumption in all
cells.
Charging rate too high. Correct charging rate.
Excessive water consumption in
one cell only.
Cracked jar. Replace battery.
24-39-00
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