AIRCRAFT
DA 42 NG AMM
Electrical Power
Doc # 7.02.15
Rev. 4
24-31-00
Page 101
15 Mar 2018
Trouble-Shooting
1. General
This table tells you how to trouble-shoot the battery system. If you find the trouble in column 1 do the
repair given in column 3.
Trouble
Possible Cause
Repair
Main battery voltage low.
Battery capacity low.
Alternator(s) low output.
Do a capacity test. If
necessary, replace the battery.
Trouble-shoot the alternator(s).
Refer to Section 24-30.
Main battery will not connect to
the RELAY BUS.
Battery relay defective.
ELECT. MASTER switch
defective.
Battery system wiring
defective.
Replace the battery relay.
Replace the ELECT. MASTER
switch.
Do test of the battery system
wiring. Refer to Chapter 92 for
the wiring diagrams.
Ammeter on ICS display
shows zero at all times for LH
or RH alternator.
Defective transducer.
Alternator regulator needs
adjustment (if MÄM 42-551 is
not installed).
Replace the related
transducer.
Refer to the engine
manufacturer.
Voltmeter on ICS display
shows zero with the ELECT.
%
MASTER switch set to ON.
Defective voltmeter.
Defective wiring in the
voltmeter system.
Trouble-shoot the ICS.
Do a test of the wiring. Refer to
Chapter 92 for the wiring
diagrams.
Summary of Contents for DA 42 NG
Page 933: ...AIRCRAFT DA 42 NG AMM Fuel Doc 7 02 15 Rev 4 28 TITLE Page 1 15 Mar 2018 CHAPTER 28 FUEL ...
Page 1459: ...AIRCRAFT DA 42 NG AMM Lights Doc 7 02 15 Rev 4 33 TITLE Page 1 15 Mar 2018 CHAPTER 33 LIGHTS ...
Page 1711: ...AIRCRAFT DA 42 NG AMM Doors Doc 7 02 15 Rev 4 52 TITLE Page 1 15 Mar 2018 CHAPTER 52 DOORS ...
Page 1853: ...AIRCRAFT DA 42 NG AMM Wings Doc 7 02 15 Rev 4 57 TITLE Page 1 15 Mar 2018 CHAPTER 57 WINGS ...
Page 2071: ...AIRCRAFT DA 42 NG AMM Engine Doc 7 02 15 Rev 4 72 TITLE Page 1 15 Mar 2018 CHAPTER 72 ENGINE ...
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