Monogram Sanitation
COMPONENT MAINTENANCE MANUAL
PN 15900-012 Series
38-31-07
Jan 10/95
Page 104
Troubleshooting
Table 101 (Page 2 of 2)
Problem Possible Cause Corrective Action
Toilet will not flush (motor- Motor-pump-filter Replace motor-pump-filter
pump-filter does not operate). inoperative. assembly.
Faulty timer. Replace timer.
Faulty LLT. Replace LLT.
Faulty solenoid valve Replace solenoid valve
assembly. assembly.
Faulty wiring. Check aircraft wiring.
Toilet will not flush (motor- Foreign object obstruction of Inspect discharge tube.
pump-filter running.) flushing fluid passages.
Pump inoperative. Sheared pump drive shaft. Replace drive shaft coupling.
Motor-Pump-Filter noisy. Improperly assembled or Replace motor-pump-filter
damaged motor-pump-filter unit assy.
assy.
Motor runs continuously or Malfunction in timer Replace timer.
excessive long. assembly.
Leakage from tank drain. Drain valve not sealed. Inspect drain outlet valve seat
area of tank for cracks, chips
and scratches. Replace drain
valve assy.
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