3-2 Change 1
Section II. OPERATOR'S TROUBLESHOOTING PROCEDURES
Operator troubleshooting is based on malfunctions or failures observed during operator PMCS or operational
use of the HWR.
3-3. TROUBLESHOOTING INSTRUCTIONS FOR MODEL RAK-15
ELECTRIC SHOCK. Do not be misled by the term "low voltage".
Whenever possible turn off and disconnect the HWR power supply
before performing any work. Potentials as low as 30 V dc can
cause severe electric shock or death under adverse conditions.
HIGH TEMPERATURES (1). Be aware that normal operating
temperatures within the HWR are up to 190 'F (88 *C) and can
reach higher temperatures under abnormal conditions. Always use
gloves or other hand protection as necessary. Unprotected
exposure to high temperatures can cause serious bum injuries.
FIRST AID. Never work on the HWR unless there is another
person present who is competent in administering first aid. The
absence of first aid ran result in serious personal injury or even
death. Refer to FM 21 -11 (First Aid for Soldiers) for appropriate
first aid instructions.
DISASSEMBLY. Do not attempt disassembly beyond that which is
necessary for operator troubleshooting and maintenance.
Unauthorized disassembly can result in the HWR becoming
This troubleshooting flowchart describes typical malfunctions, which are most likely to occur when operating
the HWR. To use the flowchart, commence at the START function and check each set of fault conditions
against the observed malfunction. When the matching fault conditions are identified, rectify the malfunction by
following the corrective action instructions in the order in which they appear.
The flowchart cannot contain all the malfunctions that may occur or all the corrective actions needed to rectify
a particular malfunction. If a particular malfunction cannot be identified, or is not cleared by the corrective
actions, notify unit maintenance.