Inconsistent Heatless Dryer Cycling; Compressor Doesn't Operate - Puregas P550W Series User Manual

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13.13 Inconsistent Heatless Dryer Cycling

Possible Cause
Defective Solenoid
Valve
Defective Cycle Timer

13.14 Compressor Doesn't Operate

Possible Cause
Defective compressor
Defective control board
System is in Shutdown
state
P550W Series Air Dryers User's Guide
Check
Measure voltage going
to the Heatless Dryer
Solenoid Valves
(section 9.8 )
Measure voltage going
to the Heatless Dryer
Solenoid Valves
(section 9.8 )
Check
Measure compressor
voltage
(section 9.3 )
Measure compressor
voltage
(section 9.3 )
On the Display Panel,
verify that the system is
in SHUTDOWN state
Page 90 of 99
Corrective Action
If 53 VDC IS present,
replace Solenoid Valves
included in the 8,000
Hour Maintenance Kit
(section 11.4 )
If 53 VDC IS NOT
present, replace the
Cycle Timer
(section 11.3 )
Corrective Action
If voltage is good,
replace compressor
(section 11.2 )
or send it in for repair
(section 12. )
If measurements are
incorrect, replace
control board (section
11.1 )
Press the RESET
Button
P011658 – Rev. P