ALL TM LEVEL MAINTENANCE
This chapter (Troubleshooting Procedures) provides information for identifying and correcting malfunctions which
may develop while operating Enhanced Container Handling Unit (E-CHU). This Troubleshooting Introduction
includes Operator Troubleshooting Instructions, Field Maintenance Troubleshooting Instructions, Troubleshooting
Information, Locator Views, and Error Code Summary.
This introduction is followed by the Operator Troubleshooting Symptom Index (WP 0012) and the Field
Troubleshooting Symptom Index (WP 0013), which list common malfunctions that may occur and refer you to the
proper page for a troubleshooting procedure.
OPERATOR TROUBLESHOOTING INSTRUCTIONS
If you are unsure of the location or operation of an item mentioned in troubleshooting, refer to Location and
Description of Major Components (WP 0002) or Description and Use of Operator Controls (WP 0004).
Before performing troubleshooting, read and follow all safety instructions found in General Information (WP 0001),
The Operator Troubleshooting Symptom Index (WP 0012) cannot list all malfunctions that may occur, nor all tests
or inspections and corrective actions. If a malfunction is not listed, or is not corrected by the listed corrective
actions, notify your supervisor.
When troubleshooting a malfunction:
Locate the symptom or symptoms in (WP 0012) that best describe the malfunction.
Turn to the troubleshooting procedure work package where the malfunction in question is described.
Perform each step in the order listed until the malfunction is corrected. DO NOT perform any maintenance
task unless the troubleshooting procedure tells you to do so.
Read each step before performing the troubleshooting procedure. Most troubleshooting procedures
require isolation and testing of multiple components. To achieve this, the troubleshooting fault procedure
is broken down as follows:
Symptom. Is a descriptive statement of the symptom (e.g., UP Button Inoperative).
Each symptom is followed by all possible malfunctions.
Malfunction. Each malfunction will be a descriptive statement identifying the
malfunction (e.g., Hydraulic Oil Level Low). There may be numerous malfunctions for
each symptom. Each malfunction is followed by a corrective action.
Corrective Action. A corrective action may include steps and sub-steps in order to
perform the procedure. If the corrective action does not identify a fault, proceed to the
next malfunction until all malfunctions have been addressed.
FIELD MAINTENANCE TROUBLESHOOTING INSTRUCTIONS
Field Maintenance Troubleshooting Procedures are provided for identifying and correcting electrical, hydraulic,
and pneumatic malfunctions which may develop while operating the Enhanced Container Handling Unit (E-CHU).
Before performing troubleshooting at the Field Maintenance level, ensure all applicable Operator Troubleshooting
Procedures have been performed.