Aeropro CZ A220, Maintenance Manual

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Maintenance Manual
AEROPRO CZ 15-4
Maintenance Manual
March 21, 2020
15.18 Trouble shooting
Trouble Probable Cause Remedy
Battery will not supply power to
electrical system or crank
engine.
Battery discharged. 1. Measure voltage at battery
terminal with master switch and
suitable load turned on. Normal
battery will indicate 11.5
– 12.0
volts. If voltage is low, proceed
to step 2. If voltage is normal,
proceed to step 3.
Battery faulty.
2. Charge battery in
accordance with charging
information found on the
battery. If battery voltage drops
below 11.5 volts 12 hours after
charging, when connected to
the aircraft with master switch
turned on, replace battery.
Faulty wiring.
3. Check voltage on master
fuse/circuit breaker. Voltage
shall not indicate more than 0.3
volts below battery voltage.
Replace defective wiring,
master switch or connectors.
15.19 Cleaning the battery
For maximum efficiency the battery and connections should be kept clean at all times.
a. Remove the battery and connections in accordance with the preceding paragraph.
b. Wipe the battery cable ends, battery terminals and the entire surface of the battery with a
clean cloth moistened with a solution of bicarbonate soda (baking soda) and water.
c. Rinse with clear water, wipe off excess water and allow battery to dry.
d. Brighten up cable ends and battery terminals with emery cloth or a wire brush.
e. Install the battery according to the preceding paragraphs.
f. Coat the battery terminals with an ignition spray product to reduce corrosion.
15.20 Testing the battery
When battery is disconnected from the electrical system of the aircraft, voltage measuring
should indicate 12.2 volts or above (regular 12.5 volts). If battery voltage is below 12.2 volts, battery
needs to be charged. When battery voltage is below 11.8 volts battery probably needs replaced.
15.21 Charging the battery
Battery should in general be charged only when disconnected from the aircraft. Charge
battery in accordance to the charging instructions found on the battery. For methods to trickle-
charge/maintain the battery charge without necessarily removing the battery from the aircraft, contact
the Aeropro distributor.