Troubleshooting - Miller Bobcat 200 Air Pak Diesel Owner's Manual

Error Display
ACTD LOW Air Compressor Transducer Low
Voltage
OIL PRES Engine Oil Low Pressure Error
H2O TEMP Engine Coolant Over Temperature
Error
H2O SHRT Engine Coolant Sense Shorted
H2O GND Engine Coolant Sense Grounded
ENG BATT Engine Battery Failure
ENG SPD Engine Speed Overrun
ENG VOLT Engine Under Voltage
ENG ACT Engine Actuator Current Error
SPD SENS Engine Speed Sensor Abnormal
ENG STRT Engine Starter Error
ENG ALT Engine Alternator Abnormal
ENG CHRG Engine Battery Charging Error
ENG COMM Engine Can Comm Error

11-9. Troubleshooting

A. Compressor Troubleshooting
Trouble
Air compressor does not operate; no air
pressure on gauge; no
engagement.
Air compressor stops producing air, or
air compressor cycles on and off.
.
A complete Parts List is available at www.MillerWelds.com
Error Name
Air compressor pressure transducer reading
below valid pressure.
Despite RPM, oil pressure switch is ON.
Engine water temperature greater than or
equal to 239°F (115°C).
Voltage of coolant temperature sensor is 4.9
volts or above
Voltage of coolant temperature sensor is 0.1
volts or less.
ECU recognition of battery voltage is
above 18 volts.
Engine speed is greater than 4140 RPM.
Voltage to sensor is below 4 volts.
Actuator current greater than 3.0 A or less
than 80 mA.
Engine speed is 0 RPM after Starter signal
into ECU.
Starter running time is above 12 seconds.
Alternator L terminal has voltage while 0
RPM (After Key On).
Alternator L terminal is 0 volts while engine
is running.
CAN Bus OFF.
Place Air Compressor switch in an On position. If compressor is turned off, wait for air pressure to bleed
clutch off before turning compressor on again.
Pressure downstream of compressor outlet above MIN pressure setting keeps compressor from en-
gaging. Compressor will engage when outlet pressure reduces below MIN pressure. See Section 6-4
for pressure setting procedure.
Check for over pressure. Check pressure settings and reduce if necessary (see Section 6-4). Turn Air
Compressor switch off to reset.
Check for over temperature. Allow unit to cool. Recirculation or open covers may cause overheating. Be
sure all covers, panels, and doors are in place. Operate in area with proper airflow. Automatic shutdown
stops compressor if compressor temperature is too high.
Check compressor belt and tension. Be sure correct belt is used and is properly installed. Replace belt
if damaged or worn.
Have Factory Authorized Service Agent check air compressor control circuit and clutch.
Compressor idle down causes compressor to turn off when set pressure is reached. See Section 7-2.
During air use, compressor pressure will continue to decrease if using more than 30 CFM. Decrease load,
or allow compressor to build pressure between loads. Compressor will automatically produce air when
a load is applied, unless it is a light load such as an air leak. For light loads, pressure will decrease to MIN
pressure and then increase to MAX pressure.
Check for air leaks downstream of compressor outlet. Air leaks cause more frequent compressor cycling.
Repair all air leaks.
Check for over pressure. Check pressure settings and reduce if necessary (see Section 6-4). Turn Air
Compressor switch off to reset.
Check compressor oil level (see Section 5-5). Automatic shutdown stops compressor if compressor tem-
perature is too high.
Description
Have factory authorized service agent
check pressure transducer connection.
Turn key switch OFF.
Turn key switch OFF.
Turn key switch OFF.
Turn key switch OFF.
Turn key switch OFF.
Turn key switch OFF.
Turn key switch OFF.
Turn key switch OFF.
Turn key switch OFF.
Turn key switch OFF.
Turn key switch OFF.
Turn key switch OFF.
Turn key switch OFF.
Remedy
Remedy
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