RJ150-30 / Operations and Maintenance Manual
Mobile Aircraft Air Conditioner
Trailer Mounted, Cool Mode Only
______________________________________________________________________________
SECTION 2 - 2
JANUARY 20, 2004
PAGE 2
WARNING
THIS UNIT CONTAINS HOT SURFACES AND HIGH PRESSURE FLUID/VAPOR
SYSTEMS. RELIEVE SYSTEM PRESSURE BEFORE DISCONNECTING FUEL,
OIL, COOLANT, OR REFRIGERANT LINES. TIGHTEN ALL CONNECTIONS
BEFORE APPLYING OPERATING PRESSURES. KEEP HANDS AND BODY
AWAY FROM PINHOLES AND NOZZLES, WHICH MAY EJECT FLUIDS/GASES
UNDER HIGH PRESSURE.
2. TROUBLESHOOTING CHART
This troubleshooting chart (See Table 1) lists information under three headings
as follows:
•
Fault & Condition
•
Probable Cause
•
Test, Check, Remedy
A. Using the Troubleshooting Chart:
The tests/inspections and corrective actions should normally be performed in
the order listed. Troubleshooting is a logical and systematic process of
determining and correcting the cause of a malfunction. The process begins
with verification of the malfunction. This may involve an operational checkout
of the unit. After the trouble has been verified, identify all components in the
circuit whose failure could cause the symptoms observed during the
operational checkout. The technician should start by checking those items
with the highest probability of causing the problem. Inspect and test each
component, until the exact cause of the problem is determined and corrected.
If the cause of a trouble is uncommon and cannot be located using the chart,
a good place to start your checks is at the last known source of power. Then
proceed by checking each component in the circuit/system thoroughly. Use
the schematics and diagrams. Electrical components in the troubleshooting
chart (such as S1, T1, etc.) are identified by a noun name and a
corresponding symbol to identify the item on schematic diagrams. It is
assumed that wiring and connections in defective circuits have been
thoroughly checked before condemning any component(s).
Refer to Supplemental Technical Manuals as required for additional details:
•
RJ150-CUM-01: Cummins/Marathon Engine/Generator Set
•
RJ150-CUN-01: Cummins/Newage Engine/Generator Set
•
RJ150-DZM-01: Deutz/Marathon Engine/Generator Set
•
RJ150-PKM-01: Perkins/Marathon Engine/Generator Set