2: Description 600H, 750, 750H, 750HH, 825, 900, 900H, 1050 T3 CAT User Manual
02250197-981 R01
32 Subject to EAR, ECCN EAR99 and related export control restrictions.
2.11 Instrument panel group,
functional description
Refer to the Compass
®
Controller User Manual (Sullair
part number 02250167-454) for how to use the Compass
Controller.
2.12 Engine control module,
functional description
Diagnostic Fault Codes are provided to indicate an elec-
trical or electronic problem has been detected by the
ECM (Engine Control Module). In some cases, the
engin
e performance can be affected when the condition
causing the code exists. More frequently, however, the
operator cannot detect any difference in the engine per-
formance.
The Compass Controller indicates a performance prob-
lem has occurred whenever the Engine Warning Lamp is
flashin
g. The d
iagnostic code may indicate the cause of
the problem, and should be corrected.
If the Compass Controller does not indicate a problem
with the engine pe
rformance but a diagnostic code is
logged by the ECM, the ECM detected an abnormal con-
dition that did not affect performance.
If this is the case, unless there are several occurrences
of the co
de in a very short period of time, or, the ECM is
indicating an Active Code at the present time, there is
most likely nothing wrong with the system.
The diagnostic FLASH CODE may be retrieved using this
lamp.
The lamp is not required for engine operation, however, it
can be u
seful to determine Active diagnostic codes. The
lamp will illuminate (ON) at initial ECM power-up to test
the lamp operation (self test).
Count the first sequence of flashes to determine the first
digit. After
a two-second pause, count the second
sequence of flashes to determine the second digit. Any
additional flash code diagnostics will follow (after a
pause) and will be displayed in the same manner.
In addition to the flash codes described above, the Com-
pass Controller should display a brief text message in the
LCD of the m
aster
gauge. This message helps to pin-
point the source of the problem and aid in troubleshoot-
ing the compressor.
Refer to Table 2-1 on
page
33 for possible performance
of active diagnostic codes.
NOTE
Only Active diagnostic codes can be read in this
manner. Logged diagnostic codes must be
retrieved with an Electronic Service Tool.
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