Parker Airtek MSC Series, Руководство пользователя

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MSC4000 - MSC15000 USER GUIDE
2.
The suction pressure won’t rise when the dew point goes below the set point and the
controller switches in load/unload mode. If the pressure fails rapidly when the controller
switches to “power saver” mode the unloader solenoid isn’t opening. If controller switch
doesn’t seem to do anything it has to be the controller or wiring.
3.
Suction pressure is very low even when controller reads over the set point or unit appears to
be pumped down and stopped when it shouldn’t be. One or both solenoids aren’t opening
when it should.
4.
Water freezes in the evaporator causing air pressure drop (dew point set 34 or higher). This
can be partial failure of unloader solenoid to open, indicated by more than 60 psi (4 bar g)
difference between compressor suction and discharge.
5. There is erratic or out of range indication of dew point. This is controller or sensor trouble.
Consult factory for details.
6. Dryer won’t restart after you stopped it for a test. This is normal if you stopped when it was
unloaded (load - unload mode) or shut down (start-stop mode). It will restart when the dew
point temperature comes above the controller setting.
NOTE: For a complete troubleshooting guide, see pages. Remember that the easiest way to
distinguish between control and solenoid malfunction is to hold a steel object, like a pocket
screw driver, over the top of the valve’s enclosing tube that sticks out from the coil and feel for
magnification. The magnification means the valve is energized. If you don’t feel it, remember to
look at the coil before suspecting the controller.
The two displays marked AMBIENT or WATER and AIR IN indicate those temperatures and control
only the respective alarm lights (see ADJUSTMENTS). It is an alarm only and will not shut your
unit down.
8.6 Factory Assistance
Please do not hesitate to call the Parker Airtek factory for technical information and assistance.
We have skilled troubleshooting and engineering personnel who are thoroughly familiar with the
equipment. A short call may save a long troubleshooting experience.
8.7 Instructions for Ordering Parts
All parts orders should be placed with your Parker Airtek Dealer. Should you not know the dealer
in your area, contact Parker-FAF.
When ordering parts, specify dryer model and serial numbers to insure receiving proper parts (see
nameplate on unit).
8.8 Miscellaneous Dryer Data
All standard dryer ratings shown are at 100ºF inlet temperature, 100ºF ambient temperatures (85ºF
water if water-cooled), 100 psi g inlet pressure. If operating outside these conditions consult the
factory.