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Low oil pressure
High oil temperature
Generator adapter low oil pressure
Generator adapter high oil temperature
White triangle flag indicators on the APU fault panel show the fault
responsible for the automatic shutdown,
|5. BLEED AIR SYSTEM
The APU supplies compressed air to power the aircraft pneumatic systems and
shaft horse power to drive the generator, which supplies the aircraft
electrical systems.
The BLEED AIR switch/light controls two valves: a surge valve, which prevents
compressor surge by bleeding off air if there is excessive pressure; and a load
control valve, which opens to deliver the bleed air to the pneumatic system.
After the EGT and rpm have stabilized and the green APU READY light comes on,
bleed air may be selected by pressing in the BLEED AIR switch/light. The surge
valve then closes and the load control valve opens.
When bleed air is no longer required, the system is shut down by pressing out
the BLEED AIR switch/light.
SECTION 5
Page 5
Mar 01/85
canadair
chaiiencjer
OPERATING MANUAL
PSP 606
FAIL LIGHT
Amber light comes on if auxiliary battery is not
providing 28 volt dc output or if internal monitoring
detects a failure.
HEATER/
CHARGER
AUXILIARY
BATTERY
ON
FAIL
HEATER/CHARGER SWITCH
Two position toggle switch
ON - If power is available on battery bus, auxiliary battery is brought up
to minimum operating temperature and rated charge by built-in
charger/monitor. Auxiliary battery output is paralleled to that of main
battery and is available to APU electronic control unit when FUEL
ON/OFF switch/light on APU CONTROL panel is pressed in.
OFF - Built-in charger/monitor is off and auxiliary battery is isolated from
APU start system.
ON LIGHT
If HEATER/CHARGER switch is ON, white ON
light comes on when FUEL ON/OFF switch/light is
pressed in to indicate that auxiliary battery is
providing full 28 volt dc output to APU start
system.
EFFECTIVTTY: A/C incorporating Canadair SB 600-0435
Auxiliary Battery Panel
Figure 3
SECTION 5
Page 6
Feb 12/88
cacnhaaaiiaeinr qer
OPERATING MANUAL
PSP 606
OIL SYSTEM
The APU engine oil system provides pressure oil and splash lubrication for all
drive gears and shaft bearings in the APU engine. If low oil pressure occurs
during APU operation, a low oil pressure switch, located in the engine
gearcase, transmits a signal and illuminates the LO PRESS light on the APU
control panel. Similarly, a high temperature switch, located near the oil
pressure switch, transmits a signal to illuminate the HI TEMP light.
The APU generator adapter has a self-contained oil system for lubrication and
cooling. Adapter oil LO PRESS and HI TEMP warning lights are also provided.
SECTION 5
Page 7
Mar 01/85
canadair
chaiienqer
OPERATING MANUAL
PSP 606
APU OVERCURRENT FAULT FLAG
White triangles indicate overcurrent fault.
APU shuts down automatically.
APU OVERSPEED FAULT FLAG
White triangles indicate APU overspeed. APU
shuts down automatically.
APU EGT HIGH FAULT FLAG
White triangles indicate APU high exhaust
gas temperature APU shuts down
automatically.
APU OIL PRESS LOW FAULT FLAG APU OIL TEMP HIGH FAULT FiAG
White triangles indicate APU low oil pressure.
APU shuts down automatically.
White triangles mo»caTe AP\j high oil
temperature. APU shut* ac**^ automatically.
GEN ADAPTER OIL PRESS LOW
FAULT FLAG
White triangles indicate generator adapter
low oil pressure. APU shuts down
automatically.
GEN ADAPTER OIL TEMP M»GH
FAULT FLAG
White triangles in&c*i* gr^vanor adapter
high oil temperature APu snots down
automatically.
IND RESET PUSHBUTTON
When pressed, fault flags are reset by
rotating them out of view, rf condition has not
been corrected, flags stay in view.
APU STOP PUSHBUTTON
When pressed, stops APU at any time.
APU Fault Indications SECTION 5
Figure 4 Page 8
Feb 12/88
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