9
4.2 TROUBLESHOOTING
NOTE: FOLLOWING BEHAVIORS ARE NORMAL CHARACTERISTIC OF OPERATION AND NOT TROUBLES
•
Display of message ESA and ES2 in case of operation without load or low load.
•
A 2 minute delay for dryer to start after pressing the on/off switch.
•
Temporary compressor and/or fan motor shutdown.
Troubleshooting and control and/or maintenance operations must be performed by qualified
personnel.
For maintenance of the refrigerating circuit of the machine, contact a refrigeration mechanic.
TROUBLE DISPLAY
POSSIBLE
CAUSE
REMEDY
W
A
T
E
R
IN THE SYST
EM
Control panel
display is
blank
No electrical power.
Restore power.
Problems with wiring.
Check wiring; if the trouble persists, replace it.
Problems with the electronic control board.
Check the electronic control board; if the trouble persists,
replace it.
The dryer is off.
Turn it on by pressing the ON/OFF switch for 1 second.
Dryer in stand-by.
Wait 2 minutes after the dryer is switched on.
Compressed air inlet/outlet inverted.
Check if the compressed air inlet/outlet is connected
properly.
The flow rate and/or temperature of the air
entering the dryer are higher than the
nominal values.
Restore the nominal conditions.
The ambient temperature is higher than the
nominal values.
Restore the nominal conditions.
The condenser is dirty.
Clean the condenser.
Condensate drain is not functioning.
Pic.3
Clean the condensate drainage system pre-filter. (Pic.3)
Replace the coil of the drainage solenoid valve if burned.
Clean or replace the drainage solenoid valve if
clogged/jammed.
Check the C8 and C9 parameters of the electronic control
board; if the trouble persists, replace it.
No loss condensate drain is not functioning.
(Optional)
Check the no loss condensate drain; if the trouble persists,
replace the service unit.
The temperature control probe is positioned
improperly or faulty.
Check the probe; if the trouble persists, replace it.
Problems with cabling or with the electronic
control board.
Check the cabling and the electronic control board, if the
trouble persists, replace them.
Activation of compressor’s internal thermal
protection.
Wait one hour and check again. If the fault persists: stop
dryer and call your local ZEKS distributor.
Problems with the electrical components of
the compressor.
Check the electrical components of the compressor.
Defective compressor.
Replace the compressor.
The flow rate and/or temperature of the air
entering the dryer are higher than the
nominal values.
Restore the nominal conditions.
The ambient temperature is higher than the
nominal values.
Restore the nominal conditions.
The condenser is dirty.
Clean the condenser.
The temperature control probe is positioned
improperly or faulty.
Check the probe; if the trouble persists, replace it.
Fan pressure switch defective or burned out
(if present).
Turn off the dryer and call your local ZEKS distributor.
High pressure switch defective or burned out
(if present).
Turn off the dryer and call your local ZEKS distributor.
Gas leakage in the refrigerating circuit.
Turn off the dryer and call your local ZEKS distributor.
Defective fan.
Replace the fan.
Protection fuse burned out (if present).
Replace the fuse.
