omi ESD 1300, Instruction And Maintenance Manual

Page: 20 / 122

Cod. 710.0159.01.00 Rev0A – 10.2011
16 - 275
7.0 TROUBLESHOOTING
SYMPTOM
POSSIBLE ORIGIN
SOLUTION
A) Temperature
shown in display
higher than the preset
value.
•
High compressed air inlet temperature.
•
High compressed air flow.
•
High ambient temperature.
•
Fouler refrigerant condenser.
•
Low refrigerant charge.
•
Phases connected incorrectly.
•
Faulty refrigerant compressor.
•
Faulty fan.
•
Faulty fan pressure switch or thermostat.
•
Faulty electronic controller
•
Problems with circulator cabling.
•
Glycol circulator defective.
•
Glycol leakage.
•
Reduce air temperature to within design limits.
•
Reduce air flow to within design limits.
•
Increase ventilation rate of installation area.
•
Clean condenser.
•
Locate and repair leak and re-charge.
•
Connect the phases correctly.
•
Replace item.
•
Replace item.
•
Replace item.
•
Replace item.
•
Check cabling.
•
Replace circulator.
•
Check glycol circuit and connections, if necessary
replace flexible tubes and/or refill glycol tank to
correct level.
B) Excessive air
pressure drop across
dryer.
•
Inlet / outlet piping reversed.
•
Temperature probe out of well.
•
Faulty refrigerant solenoid valve.
•
Ambient temperature below freezing.
•
Obstruction in air circuit.
•
Air by – pass valve close.
•
Connect properly.
•
Re-install.
•
Replace item.
•
Install dryer in heated space.
•
Locate and remove blockage.
•
Open valve.
C) Water present in air
downstream of dryer.
•
Condensate drain strainer fouled.
•
Faulty condensate drainer.
•
Faulty electronic controller.
•
High dew – point temperature.
•
Air by – pass valve open.
•
Clean strainer.
•
Replace item.
•
Replace item.
•
See Symptom #A above.
•
Close valve.
8.0 CONDENSATE DRAIN
8.1 Drain valve maintenance
•
Close the ball valve located on the filter/stop installed at the drain trap inlet.
•
Depressurize the trap by pushing the TEST button on the control panel.
•
Unscrew the plug in the end of the filter/stop to access the filter screen (F)
and clean it with a compressed air jet.
•
Reassemble and open filter/stop valve.
Cleaning of the drain
solenoid valve
1= Dicharge endurance (3 sec)
2=
Interval between
discharges (2 min)
8.2 NO LOSS CONDENSATE DRAIN
(F)