Apu (Auxiliary Power Unit); Apu (Auxiliary Power Unit) - Carrier ComfortPro PC6000 Operation & Service Manual

3.1 APU (AUXILIARY POWER UNIT)

SYMPTOM
Engine does not start
(starter works)
3-2
Each symptom is followed by a probable cause and suggested solution. To isolate the
possible cause, proceed in a systematic manner to determine the faulty component. This
guide does not cover all possible situations that may occur under all conditions of operation.
Before using this guide verify correct voltage and ground to components.
PROBABLE CAUSE
• No fuel
• Air in the fuel system
• Water in fuel system
• Fuel solenoid not pulling in
• Fuel pipe/line clogged
• Fuel filters clogged
• Excessively high viscosity of
engine oil at low temperature
• Fuel leak due to loose injection
pipe retaining nut
• Injection nozzle clogged/defective
• Injection pump defective
• Fuel lift pump defective
• Low cylinder compression
• Valve spring broken, valve stuck
• Excessive valve clearance
• Glow plugs malfunctioning
• Plugged air filter
Disconnect the batteries from the
APU before performing any
repairs.
SOLUTION
• Check fuel stand pipe length
• Bleed air
• Drain fuel tank(s) and replace
fuel filters
• Check for rust in plunger/check
for voltage
• Check for bent solenoid linkage
• Clean/replace
• Replace
• Use the specified engine oil
• Tighten nut
• Clean/replace
• Replace
• Replace
• Repair/replace engine
• Repair/replace
• Adjust
• Check/replace
• Clean/replace
*Kubota Workshop Manual 97897-02400
62-11175 COMFORTPRO SERVICE MANUAL
WARNING
REFERENCE
• A-8
• A-8
• A-8
• A-2
• Kubota Manual*
• Kubota Manual*
• Kubota Manual*
• Kubota Manual*
• Kubota Manual*
• Kubota Manual*
• Kubota Manual*
• Kubota Manual*