Operational Details
82011-IM, REV J
Sandel SG102 & MT102 Installation Manual
Page 7-2
Under normal conditions, SG102’s with MOD 1 under normal conditions will initialize in less than 3
minutes. SG102’s without MOD 1 take approximately 5 minutes. While the SG102 is initializing
(prior to validity) the aircraft should not be moved.
SG102’s with MOD 2 will initialize in approximately 1 minute.
7.2
LED Error Codes
The ERROR LED normally is used only as a health monitor during startup when it flashes
continuously. If an internal failure does occur the ERROR led will flash with a number of consecutive
flashes followed by a pause. The flashes will continue to repeat as long as power is applied to the
SG102 and the error condition continues to exist. The ERROR flash codes are as follows.
No. of Flashes Cause
1
-15v Power Supply
2
-5v
Power Supply
3
+15v Power Supply
4
+5v
Power Supply
5
+1.9v Power Supply
6
+1.5v Reference
7
+2.5v Gyro Reference
8
+5v
Gyro Reference – SG102 (MOD 1).
Altitude Error - an internal error is detected (outputs flagged) SG102 (MOD 2) and
SG102/D.
9
Attitude Error - an internal error is detected (outputs flagged) SG102
