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MONOGRAM SYSTEMS
COMPONENT MAINTENANCE MANUAL with ILLUSTRATED PARTS LIST
BASIC PN 15900
Page 103
Monogram Proprietary – See title page for details
38-31-09
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.
Replace motor-pump-filter
assembly.
Faulty
timer.
Replace timer.
.
Faulty
LLT.
.
Replace LLT.
Faulty solenoid valve assembly.
.
Replace solenoid valve
assembly.
.
Faulty wiring.
Check aircraft wiring.