TROUBLESHOOTING GUIDE

Problem Possible Cause Service Instructions

13. Vacuum pump is running too slow, overheating, blowing fuses or circuit breaker. 14. Toilet will not flush. (No vacuum.) See problems 3 and 15 if necessary. 15. Blockage between toilet and vacuum generator. 16. Pump emits odor. a. Gear motor is worn or defective.b. Plugged vent line or vent filter.c. Blockage in discharge line.d. Improper wire size. e. Improper voltage.f. Vacuum pump bellows clogged with tissue.a. There is a blockage in the system. b. Pump will not run.c. Duckbill valves in vacuum pump are inverted due to blocked dis- charge line or an attempt to pump out against closed seacock.a. Collapsed vacuum line.b. Sharp bends or kinks in vacuum hose.c. Improper operation of toilet.d. Foreign objects were flushed down toilet. a. Loose or defective hose connection on pump.b. Loose intake or discharge fittings on pump.c. Worn, torn or punctured pump bellows (vacuum generator) or diaphragm (vacuum holding tank). a. Check motor and replace if necessary.b. Disassemble and clean out vent line. Replace vent filter if necessary.c. Disassemble and clean discharge line. Be certain that in-line valves (duckbill valves) and seacock are in proper position. d. Wire size too small. Check electri-cal diagram for proper wire size for voltage of pump used.e. Check input power for low voltage. f. Remove and clean bellows assembly. (When flushing toilet, using more water may alleviate this problem.)a. Open flush ball and check the 1-inch (25mm) orifice at the bottom of the base for block- age and dislodge it. Never use drain-opening or other household plumbing chemicals. If blockage is not in base, it may be found in these locations: • outlet of vacuum tank • inlet of vacuum generator • diptube of vacuum generator • inlet of vacuum pumpb. See problem 12. c. Replace duckbill valves, making sure they point in the correct direction.a. Inspect vacuum line for collapsed condition and replace line if needed.b. Inspect vacuum hose for kinks or bends. If less than 8.5-inches (216mm) radius on any bend, reposition hose to achieve minimum 8.5-inch bend radius.c. Make sure each person using toilet knows correct procedure.d. DO NOT flush any non-dissolving items (i.e. sanitary napkins, facial tissue, wet strength tissue, paper towels, etc.) or excessive toilet tissue down toilet. Rapid- dissolving SeaLand brand toilet tissue is best.a. Tighten connections or replace hose and make new connections.b. Tighten intake or discharge fittings on pump. Replace nipples or adapters if necessary.c. Replace pump bellows or diaphragm. 12