Remote Controls; Remote Signalling Alarm; Troubleshooting - omi ESD Serie Manual Del Operador

6.10

REMOTE CONTROLS

6.10.1 Remote ON/OFF
The dryer can be remotely started and stopped (REMOTE ON/OFF). Proceed as follow to activate this function:
1. Disconnect the dryer from electrical supply and open the electrical box.
2. Remove the bridge between the two terminal blocks marked with "ON/OFF" (See electric wiring diagram – wires 14 and 10).
3. Connect the "ON/OFF" terminal blocks to remote a unipolar switch.
Remote ON/OFF digital input is configured as follow: close contact = dryer ON.
The activation of the above function is at the user's discretion. The user will purchase all necessary
installation materials himself. Any operation which needs access to the dryer must be carried out by
qualified personnel.

6.10.2 Remote signalling alarm

The dryer control board is supplied complete with a digital output configured as remote signalling alarm. This digital output is controlled
by a relays configured as normally open: when an alarm is detected, these relays close a circuit. The status of the relays can be
inverted, if necessary, using AL18 programming parameter (See 6.6.2 Parameters table).
Proceed as follows to activate a remote alarm output:
1. The User must provide a signaller in compliance to output relays electrical features (solenoid coil, light bulb, acoustic signaller,
...).
2. Disconnect the dryer from the electrical supply and open the electrical box.
3. Connect the signaller on "REMOTE ALARM" terminal blocks (See electric wiring diagram – wires 25 and 26).
The activation of the above function is at the user's discretion. The user will purchase all necessary
installation materials himself. Any operation which needs access to the dryer must be carried out by
qualified personnel.
Alarm Output relays electric features:
Voltage on User's discretion
max. current 3A

7.0 TROUBLESHOOTING

SYMPTOM
A) Temperature
shown in display
higher than the preset
value.
B) Excessive air
pressure drop across
dryer.
C) Water present in air
downstream of dryer.
Cod. 710.0159.01.00 Rev01 – 10.2012
When the dryer is switched off using remote OFF command, the controller shows on upper display line
the message "OFF" and the remote ON/OFF led blinks.
The remote OFF function disables the ON function from the dryer's control board (until the ON function
is activated from remote ON/OFF switch). To restart the dryer it's necessary to operate on the remote
control.
POSSIBLE ORIGIN
•
High compressed air inlet temperature.
•
High compressed air flow.
•
High ambient temperature.
•
Dirty 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.
•
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.
•
Condensate drain strainer fouled.
•
Faulty condensate drainer.
•
Faulty electronic controller.
•
High dew – point temperature.
•
Air by – pass valve open.
SOLUTION
•
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.
•
Connect properly.
•
Re-install.
•
Replace item.
•
Install dryer in heated space.
•
Locate and remove blockage.
•
Open valve.
•
Clean strainer.
•
Replace item.
•
Replace item.
•
See Symptom #A above.
•
Close valve.
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