TM 10-4610-239-24
TM 08580B-24/3
SYMPTOM INDEX-Continued
Equipment
Page
Symptom
REVERSE OSMOSIS PUMP ASSEMBLY
1. PUMP ELECTRIC MOTOR FAILS TO START WHEN
R.O. PUMP SWITCH IS SET TO START ................................ ................................ ........
2. PUMP ELECTRIC MOTOR FAILS TO START WHEN
JOG SWITCH IS SET TO JOG ................................ ................................ ........................
3. PUMP KNOCKS EXCESSIVELY................................ ................................ ................................ .
RAW WATER PUMP NO. 1 ASSEMBLY
PUMP ELECTRIC MOTOR FAILS TO START WHEN RAW WATER
PUMP NO. 1 SWITCH IS SET TO START ................................ ................................ .................
RAW WATER PUMP NO. 2 ASSEMBLY
PUMP ELECTRIC MOTOR FAILS TO START WHEN RAW WATER
PUMP NO. 2 SWITCH IS SET TO START ................................ ................................ .................
BACKWASH PUMP ASSEMBLY
1. PUMP ELECTRIC MOTOR FAILS TO START WHEN BACKWASH
SWITCH IS SET TO START ................................ ................................ ...............................
2. PUMP ELECTRIC MOTOR FAILS TO START WHEN ELEMENT
CLEANING SWITCH IS SET TO START ................................ ................................ ............
3-1. GENERAL.
a. Troubleshooting at the direct support level requires location of any trouble as quickly as possible. Once the trouble
is located, repair or replace the item if authorized by the Maintenance Allocation Chart. This section is designed to aid in
quick, accurate diagnosis of problems associated with the ROWPU. In its simplest state, troubleshooting the ROWPU is
an exercise in logic.
b. It is most important to understand that the ROWPU is really made up of aseries of systems with each system
having a number of assemblies. Some of these systems are interrelated; others are not. The ROWPU operates within a
framework of logical rules and physical laws and the key to troubleshooting is a good understanding of all the systems
and their assemblies.
NOTE
Before using the troubleshooting table, check your work order and talk to unit
maintenance, if possible, for a description of the symptoms and the steps that have been
taken to correct them.
c. This section breaks the ROWPU down into its systems and assemblies, allowing the problem to be isolated. The
troubleshooting table lists the most common problems and the most probable causes of trouble. It would be impossible
to list every possible problem that could happen along with every possible cause, but it will locate most problems and
eliminate a lot of unnecessary guesswork. The systematic format will locate problems within a given assembly but,
because many of the ROWPU assemblies are interrelated, the solution to a particular problem may be found in more
than one assembly.
3-2
