Monogram 15900-013 - Troubleshooting Common Issues

Monogram Systems
COMPONENT MAINTENANCE MANUAL
BASIC PN 15900
38-31-09
Page 103
May 17/02
2. Troubleshooting
A. The troubleshooting information given in Table 101 deals with problems encountered
during testing of the toilet assembly. Before performing troubleshooting remedies,
check all wiring and electrical connections, pressurized hose connections and drain
piping for general condition. Repair/replace as required.
Table 101
Troubleshooting
TROUBLE PROBABLE CAUSE CORRECTIVE ACTION
Toilet tank does not rinse
during servicing.
Solenoid valve assembly held
closed.
Replace LLT.
Replace solenoid valve
assembly.
Check power to solenoid
valve assembly and aircraft
wiring.
Spray nozzle will not rotate,
motor and pump operative.
Spray nozzle clogged or not
installed properly.
Clean and install parts
properly (refer to
DISASSEMBLY and
ASSEMBLY).
Toilet tank floods during
servicing.
Solenoid valve assembly stuck
open.
Replace LLT.
Replace solenoid valve
assembly.
Check aircraft wiring of
LLT and solenoid valve
assembly.
Solenoid valve assembly
leaking.
Faulty or leaky solenoid valve
assembly.
Replace solenoid valve
assembly.
Toilet will not flush (motor-
pump-filter does not
operate).
Motor-pump-filter inoperative.
Faulty timer.
Faulty LLT.
Faulty solenoid valve assembly.
Faulty wiring.
Replace motor-pump-filter
assembly.
Replace timer.
Replace LLT.
Replace solenoid valve
assembly.
Check aircraft wiring.