Operator's Manual High Pressure Breathing Air Compressors

Operator’s Manual
Trouble Cause Remedy
Electric Control System (optional)
Control does not switch on No control voltage Check feed line
Thermal overload relay for drive
motor triggered
Control does not switch off, final
pressure safety valve blows off
Electronic Control (optional)
Electronic Control shuts off unit before
40 seconds have elapsed
Electronic Control indicates fault although
all monitored items are ok
Electronic Control indicates fault although
operating parameters are ok
Automatic Condensate Drain (optional)
Control fuse defective Replace fuse, eliminate cause
Control current line cut off, line or
terminal loose
Tighten terminal
Thermal overload triggered Clear faults as described in the following
Current consumption too high Check compressor drive
Overload relay set too low Correct setting, check current consumption
of each phase
Final pressure switch set too high Correct setting
Final pressure safety valve defective
Replace safety valve
Timing circuit defective Replace Electronic Control
Wire to monitored item broken Repair wiring
Sensor defective Replace sensor
Drain valves do not close No control air Check control air line
Drain valves leaking due to dirt Dismantle drain valve and clean
Drain valves do not open Condensate drain valve piston jammed
Dismantle drain valve, clean or replace
valve
Solenoid valve does not close Solenoid valve faulty Check solenoid valve and replace if
necessary
No electrical signal Check electrical control circuit and
timer
Solenoid valve does not open Solenoid valve faulty Check solenoid valve and replace if
necessary
Unsatisfactory drainage (lot of condensate
from manual valves)
Continuous electrical signal Check electrical control circuit and
timer
Nozzle in 3rd or 4th stage drain
valve clogged
Remove nozzle, clean
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