Vmac PREDATAIR - Page 20

VMAC – Vehicle Mounted Air Compressors
Toll Free: 1-800-738-8622 Local: 1-250-740-3200
Fax: 1-250-740-3201
18
Pressure sensor has failed
or problem with wiring
connections
Check pressure sensor and wiring.
Low system air pressure.
Air reservoir drain open.
Close valve.
Air leak.
Check all fittings.
Check air lines for wear/damage.
System demands exceed
compressor delivery.
Reduce air demand.
Check for correct amount of
hydraulic flow for the desired CFM.
Blowdown system stuck.
Check for air venting from
blowdown cap while running.
Compressor stalling/not
building air.
Hydraulic relief valve
lifting.
Check hydraulic pressure while
running.
Check for other relief valves in
system set too low. Minimum
setting 2800psi.
Hydraulic flow too low.
Check for correct amount of
hydraulic flow for the desired CFM.
Ensure that engine rpm is being
maintained when load is applied.
UNLOAD solenoid failure.
Check solenoid and wiring.
General
Message/Problem
Possible Cause
Corrective Action
CHECK AIR FILTER
Every 100 hrs, the system
reminds the operator to
check the air filter.
Check air filter and replace as
needed. Message will stop
automatically after 6 hrs of
operation.
HRS:XXXX:XX 500S
Every 500 hrs, the system
reminds the operator to
service the compressor.
Perform service as per Owners
manual using VMAC service kit.
Once complete, enter the
Diagnostics Mode and clear the
service reminder. Refer to the
appropriate section in the Owners
manual.
OVER TEMP COMP -
Compressor is getting too
hot and is shutting down.
Low compressor oil.
Check oil level and fill as required.
Oil flow restricted.
Check oil filter for blockage.
Remove hoses and check for
blockage.
Check cooler for blockage.
Fan not operating.
Check connections.
Check fan and relay.
Insufficient air-flow or
ventilation.
Make sure the cooler and air filter
are not blocked.
Open door if installed in a cabinet.
Improve ventilation.
Move the PREDATAIR out of the
cabinet.
Failed temperature probe
or bad wiring connection.
Check the temperature probe and
wiring connections.
OVER TEMP HYD -
Hydraulic oil is getting too
hot and the compressor is
shutting down.
Insufficient air-flow or
ventilation.
Make sure the cooler is not
blocked.
Open door if installed in a cabinet.
Improve ventilation.