600H, 700HH, 750, 750H, 750HH, 825, 900H, 1050 USER MANUAL SECTION 5
90
Engine overheating Loose or broken fan belt Tighten or change belt.
Dirty radiator core Clean thoroughly.
Dirty oil cooler Clean thoroughly.
Low water level Refill.
Dirty aftercooler Clean thoroughly.
Low fluid level Refill.
Faulty water pump Change pump.
Plugged radiator Clean and flush thoroughly.
Defective engine thermostat Replace engine thermostat.
Shutdown panel lights Faulty switch indicated by light Replace the switch.
Check engine light Engine safety switch (low coolant) fault Replace the switch (Caterpillar part).
Engine warning flashing
light
Count number of flashes. This will flash
trouble code.
Determine trouble code and call Caterpillar
Service Representative to correct problem.
Regeneration will not
automatically engage.
Regeneration Switch in the inhibit
position.
Force regeneration, or restart the unit.
Unit derated on its own Soot load >100% Force regeneration, or restart the unit.
Inspect spark plugs.
Compressor shuts down
with air demand present
Compressor discharge temperature
switch is open
Insufficient cooling airflow due to low hydraulic
fluid level; add fluid and check for leaks
Compressor overheating Low cooling airflow due to low hydraulic
fluid level
Add fluid and check for leaks
Low cooling airflow due to incorrectly
programmed machine.
Verify controller is loaded with correct machine
configuration file.
Fan speed higher than
expected.
Wiring or connector issue to fan control
solenoids.
Verify and correct wiring.
Sensor (compressor, CAC, ambient,
coolant, package discharge)
malfunction.
Replace sensor.
Hydraulic system
overheating
Low fluid level. Add fluid and check for leaks
Faulty thermostat element. Replace thermostat element.
Dirty cooler core. Clean core thoroughly.
Plugged internal cooler passages. Clean passages or replace cooler.
Table 5-2: Troubleshooting Chart
SYMPTOM PROBABLE CAUSE REMEDY
NOTE
Additional troubleshooting tips are available in the Controller Manual.
Sullair Part No. 02250201-742.
To Next Page
Loading...
