PUREGAS, LLC
P4200PM / P5000PM Remote Air Dryer User’s Guide
Page 70 of 79
P012649 – Rev B
13.9 Compressor Doesn’t Operate
Possible Cause
Check
Corrective Action
Defective compressor
Measure voltage to
compressor
(section 9.3)
If voltage is good,
replace compressor
(section 11.6)
or send it in for repair
(section 12. )
No power to compressor Measure voltage to
compressor
(section 9.3)
If voltage is
NOT
present or fluctuates,
continue to next
Possible Cause
Defective Solid State
Relay
Measure voltages at
Solid State Relay
(section 9.5)
If measurements are
bad, replace Solid State
Relay (section 11.2)
System is in Shutdown
state
Verify unit is not in a
Humidity alarm (section
8.9)
Press the
RESET
Button (section 8.9)
13.10 Compressor Won’t Build Pressure
Possible Cause
Check
Corrective Action
Low System Pressure
Verify System Pressure
(section 8.7)
Adjust System Pressure
to 50 PSI (section 8.7)
Defective Unloader
Valve
Test Unloader Valve
operation (section 9.7)
If this is continuously
flowing high amounts of
air, the Unloader Valve
is defective.
Replace Unloader
Valve
(section 11.4)
Leak in air system
Check all hoses and
fittings between
compressor and Air
Tank for air leaks
(section 9.16)
Connect, tighten, or
replace leaking
component
