TruTrak Altrak VS - Manual (Page 11)

TruTrak Flight System 9 Altrak Installation & User Guide
January 2009 8300-014 Rev B
Trouble Shooting
Problem Cause Corrective Action
ALT LED will not blink
when power applied
No aircraft voltage and/or
ground to system Correct power, ground
wiring
ALT LED blinks but will
not light up when pressed
Engage signal not received
at module or DT/PP not
engaged if connected pin 9 Check for low (ground) at
pin 3 when ALT switch
depressed
ALT VS will not engage (
ALT
LED light up)
Engage signal not received
at module or VS knob not
centered (2.5 v) See above and/or check for
2.5 v at pin 8 at module
Aircraft pitches up or
down rapidly Pitch servo is reversed Install or remove jumper to
ground pin 4
Aircraft hunts up and
down Activity not correct See note 3 (slow hunt
increase activity)
Weight of Module, switches, wires:
.5 lb
Weight of servo 2.5 lb
Max voltage 14 volts
Max current with servo engaged 2 amps