Piper SEMINOLE PA-44-180, Maintenance Manual

Page: 113 / 881

CHART 2101. TROUBLESHOOTING (JANITROL HEATER)
Trouble Cause Remedy
Heater fails to light. Heater switch or circuit Turn on heater switch or
breaker off. close circuit breaker.
Low voltage supply. Apply external power supply.
Attempt to start heater.
Fuel cut off from tank. Turn on heater switch.
Regulator not operating Check for low pressure or replace
regulator.
— Note —
When making the fuel pressure check, be sure fuel is flowing through the nozzle.
The fuel regulator can be adjusted. Turn the adjusting screw clockwise to increase
feel pressure and counterclockwise to decrease it. (Refer to Figure 21-4.)
Restriction in fuel nozzle Remove the nozzle and clean
orifice. or replace it.
Suction leak ahead of pump. Secure all fittings.
Fuel heater solenoid not Remove and check solenoid.
operating. Replace if faulty.
Insufficient fuel pressure. Low or no current to fuel pump.
Check operation of pump.
Fuel lines clogged or broken. Inspect all lines and connections.
It may be necessary to disconnect
lines at various points to determine
where the restriction is located.
Ignition vibrator inoperative. Replace vibrator.
Regulator not operating properly. Check for low pressure or replace
regulator.
Manual reset limit (overheat) Press reset button firmly (overheat
switch open. light will illuminate when heater
switch is on) and recheck to determine
reason for switch opening.
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
2 1 - 0 2 - 0 0
Page 21-02
Revised: May 15, 1989
1E17
PIPER AIRCRAFT