Blink Patterns - Desert Aircraft DA50 EFI Owner's Manual

DA 50 EFI OWNER'S MANUAL HFEDCN0374 REV C
Table III: ECM 14 pin Input Connector
Pin Signal
1 Tx
2 PUMP SIGNAL
3 Rx
4 NC
5 GND
6 PUMP (+)
7 TACH OUT
8 PUMP (-)
9 THROTTLE SIGNAL
10 GND
11 ENABLE
(Special feature
available on
request)
12 GND
13 MAIN GND
14 POWER 12V
5a. ECM Blink Patterns
If the engine is not starting, checking the STATUS light on the top of the ECM can signal what
problem is seen by the ECM. The pattern repeats after 3 second pause, and blinks at 1 to 2 Hz.
Table IV: Blink Patterns
Number of Blinks
1
2
3
5
Description
RS-232 Transmit
Variable voltage output from fuel pump assembly.
RS-232 Receive
Not Connected
Crank signal output ground reference
Fuel System power (routed internally from system power
pin 14 and enabled by a high side driver (relay) from
ECM state commands).
+5V logic-level digital output. This pin has a maximum
continuous load of ±20mA. Output signal has a 50% duty
cycle.
Fuel system ground reference.
Throttle position with logic-level input. A Pulse Width
Modulated (PWM) signal at nominally 50Hz with ON time
ranging from 900µs to 2100µs corresponding to throttle
position (0% to 100%). This pin has an 8mA draw.
Throttle input ground reference.
Engine enable signal from AP. A 5-volt signal present to
enable (UAV option only). This pin has an 8mA draw. 10k
pull down resistor.
Enable ground reference
Main Ground
Main power input. 10 to 14 volts. Maximum power draw
is 12 W at wide open throttle. (11.1v 3 cell LiPo 2000ma
or bigger)
See HFE "Released Documents" folder for latest revision.
Fault
High battery disconnected
MAT disconnected/no signal
CHT disconnected/no signal
Pulse train (throttle) not active
15