ALTEC AIR, LLC
P550W Series Air Dryers User’s Guide
Page 90 of 98
P011658 – Rev. S
13.17 High Compressor Last Run Time Alarm
Possible Cause
Check
Corrective Action
Low System Pressure
Verify System Pressure
Adjust System Pressure
to 50 PSI, ± 2 PSI.
High Flow condition
Verify Flow Rate
(
FLOW
) reading is not
higher than expected
Troubleshoot High
Flow condition
(section 13.11 )
Defective Unloader
Valve
Test Unloader Valve
operation (section 9.6 )
If this is continuously
flowing high amounts
of air, the Unloader
Valve is defective.
Replace Unloader
Valve
(section 11.3 )
Defective Heatless
Dryer Solenoid Valve
Verify consistent
Heatless Dryer cycling
(section 9.5 )
If either side is
continuously flowing
high amounts of air, the
Solenoid Valve is
defective.
Replace Solenoid
Valves included in the
8,000 Hour
Maintenance Kit
(section 11.4 )
Defective control board Measure voltages at
control board
(section 9.3 )
If measurements are
incorrect, replace
control board (section
11.1 )
13.18 Can’t Create a High Compressor Last Run Time Alarm
Possible Cause
Check
Corrective Action
High Compressor Last
Run Time Alarm set
point higher that the
default of 3:00 minutes
Verify High
Compressor Last Run
Time Alarm set point
Allow the compressor
to run longer than the
verified set point
(section 9.11 )
Defective Control
Board
Verify that the
compressor has run
longer than the verified
High Compressor Last
Run Time Alarm set
point (abo
ve)
Replace Control Board
(section 11.1 ) if the
compressor runs longer
than the verified High
Compressor Last Run
Time Alarm set point
by 1 minute or more
and fails to create an
alarm.
