Troubleshooting - Sullair 375 User Manual

375, 375H, 400HH, 425, 425H T4F User Manual

4.5 Troubleshooting

The following guide contains symptoms and usual
causes for the problems that may occur throughout the
compressor system. Each warning or fault message that
may appear is listed along with conditions for the prob-
lem, a probable cause, and a suggested solution to the
problem. Do not assume that these are the only troubles
that may occur. The following table denotes all warning/
shutdown conditions that the Single Axle Controller will
sense. Shutdown conditions will display the associated
Error Message
No Message
Low Fuel Level
Comp High Temp
RTT High
Primary Shutdown
WL Comm Error
Warning/Shutdown/
Prevent Startup
Prevent Startup
Shutdown/Prevent
Startup
Shutdown/Prevent
Startup
Shutdown/Prevent
Startup
Shutdown/Prevent
Startup
Shutdown/Prevent
Startup
Subject to EAR, ECCN EAR99 and related export control restrictions.
message on the LCD, light the compressor shutdown
panel lamp, shut the system down, and wait for operator
to toggle the MENU TOGGLE switch to "EXIT" to
acknowledge the fault condition before a restart may be
attempted. Warning conditions display the associated
message on the LCD and light the compressor warning
lamp. Under a warning condition the system will continue
to operate normally.
Description
No power or initialization
of controller.
Fuel level low shutdown
threshold reached.
CDT sensor is above shut-
down setpoint.
Coolers dirty.
Fan slipping.
Compressor oil thermostat
malfunction.
RTT (Receiver Tank Tem-
perature) switch normally
closed, has opened.
After filter restriction too
high (filters dirty).
After filters dp module
malfunction.
Loss of LIN communica-
tion with warning bank
module.
02250223-036 R01
4: Operation
Recommended action
Turn OFF/ON/START switch to
ON position.
Make sure E-stop is not engaged
(pull out).
Turn battery disconnect switch to
ON position.
Check battery voltage.
Check connections between Sin-
gle Axle Controller and harness
and at the starter and harness.
Make sure Single Axle Controller
internal circuit breakers (4) are
closed.
Add fuel and restart.
Verify thermistor resistance
between 803 Ω @ -50°C and
1573 Ω @ 150°C.
Clean coolers.
Check/adjust fan belt tension.
Replace thermostat.
Replace the RTT switch.
Replace filters.
Check source voltage and ground
and correct if necessary.
Visually inspect for damage and
replace if necessary.
Check Single Axle Controller and
ensure that all gauge and warn-
ing bank connectors are well
seated/engaged.
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