TM 55-1510-221-10
3-6 lists failed test symptoms by malfunction codes
and lists codes for recommended actions.
Table 3-3. Malfunction Code Check
step
Indication
Control
Operation
1
2
Data Selector
Rotate to DSRTK/STS
3
TEST switch
Press and release
Indicator or
Display
WARN light
Lights
RH data display
Action code second and third
digits
RH data display
Lowest number malfunction code
which has occurred since this
Indication
procedure was performed replaces
action code.
4
5
Repeat step 3 repeatedly, recording all malfunction codes until second and third digits again indicate
an action code or go blank. Refer to Table 3-4 for action codes and recommended action and to Table
3-5 for malfunction code definition.
If WARN light extinguishes and two digits go blank, failure was intermittent and has been cleared. If dig-
its do not go blank, perform action according to displayed recommended action code.
3-73
