TM 10-4610-232-12
Table 3-1. Operator Troubleshooting Guide (Continued).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3. Media filter won’t go into backwash cycle.
Step 1. Check control panel set-up.
Press SYSTEM RESET pushbutton.
Turn OPERATION MODE switch to BACKWASH.
Press INITIATE pushbutton.
Step 2. Check media filter water level.
Open media filter upper drain valve and drain water until backwash cycle starts. Close drain valve.
Step 3. Notify unit maintenance.
4. Clean/flush tank runs out of water before backwash cycle is over
Step 1. Check clean/flush tank level.
Tank must be full before starting backwash cycle.
Step 2. Notify unit maintenance.
5. Media filter air blanket won’t come on or level indicator does not turn white.
Step 1. Check AIR BLANKET V20 light.
Press LIGHT TEST, if light does not come on change pilot light.
Step 2. Check air blanket block valve at air manifold.
Open valve.
Step 3. Check media filter inlet pressure and check air pressure.
If air pressure is equal to or just greater than media filter pressure during normal operation, adjust
system air regulator until the air pressure is 10 psi (69 kPa) greater than water pressure.
Step 4. Notify unit maintenance.
6. Media filter AIR BLANKET V20 light won’t turn off.
Step 1. Notify unit maintenance.
NOTE
Unit can be operated by using the air blanket block valve to manually control the air level in
filter. Open and close the valve to keep the air blanket level between the middle stop switch
on the level indicator.
7. Media filter air level chamber is plugged (flags always stay the same color).
Step 1. Open drain valve on bottom of air chamber.
Step 2. Shut down ROWPU and vent all pressure from the media filter.
Remove bottom cover from chamber and clean out media. Do not drop float when it slides out of
chamber. Clean out water line that goes from chamber to media filter. Install float with arrow pointing
up. Reinstall cover on chamber.
8. Media filter won’t drain.
Step 1. Check for a plugged line.
Slowly open drain valve while media filter has water pressure in it.
Step 2. Notify unit maintenance.
9. No air goes into media filter during backwash.
10.
Step 1. Check backwash air block valve at air manifold.
Step 2. Refer to manual operation of backwash air valve, para. 2-33.
Step 3. Notify unit maintenance.
Valves do not cycle correctly during backwash.
Step 1. Refer to automatic valve troubleshooting.
Step 2. Use manual procedures (para. 2-33).
Step 3. Notify unit maintenance.
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