Parker 250 - Control System; Control Panel & Parameters; Alarms and Warnings; Maintenance

250 3
English
5 Control
5.1 Control panel
3
4
2
1
y
xé
z
[
&
Display
Reference Name Description
1
MAIN SWITCH
I ON = dryer powered;
O OFF = dryer not powered
2
POWER LED
Yellow = dryer powered
Green = dryer operating
3
WARNING LED
O = no signal
Flashing = Alarm or warning
4
DRAIN LED Lit = Drain open
Keyboard mode STANDARD MENU*
x
ON/OFF BUTTON
Switching no/o Con rm
z
RESET BUTTON
Reset alarm/warnigng Up
é
HISTORY BUTTON
Alarm/warning log Down
y
DRAIN BUTTON
Condensate drain Out
*returns to STANDARD mode a er 5 minutes.
5.2 Operation
Operation status
With the MAIN SWITCH
&
turned to “I ON” (dryer powered) three
working conditions are possible:
DRYER
STATUS
DISPLAY
[
POWER LED (2)
1
OFF OFF Yellow
2
ON Dew point Green
3
REMOTE OFF r.OF Yellow
To switch from OFF to ON turned to “I ON” (and vice versa) press
x
.
! In OFF status the unit remains powered until the MAIN SWITCH
&
turned to “I OFF”.
Y To manage REMOTE OFF mode, remove the bridge be-
tween terminals X4.0 and X4.10 (see par. 8.8.) and connect
the remote start/stop switch(to be provided by the customer).
In ON status, use the button with the following logic:
X4.0 X4.10 X4.0 X4.10
DRYER STATUS ON REMOTE OFF
! Do not activate ON status (refrigeration compressor operating)
more than 10 times in one hour.
Scheduled maintenance
Y When the DISPLAY
[
alternatively shows the Sr warning
code and dew point, contact authorized assistance personnel for carry-
ing out scheduled maintenance indicated in par. 6.3 and for resetting the
warning code (see par. 5.4 in List of alarm/warnings).
Press
z
to cancel the warning for 24 hours.
Condensate drain
 ere are two operation modes:
• TIMED - check that the automatic condensate drainage system is
working properly.
Use manual drainage to check that condensate is not retained as this
is symptomatic of poor drainage.
 is check of the timed drain opening (parameter d1).
Settings depends upon the operating conditions of the dryer and var-
ies the amount of condensate to be removed.
For standard dryer operating conditions, see the following table of
recommended settings:
Model Parameter d1
250
5
• EXTERNAL - if there is an external drain (24VAC).
To change operation mode, use the parameter d3 (see par. 5.3 in List
of parameters).
Y Only set the EXTERNAL mode in absence of the solenoid valve.
Otherwise the relative coil could become damaged.
Alarm log
Contains the descriptions of the last alarms (max. 8).
Press
é
for 5 seconds: the keypad now operates in Alarm MENU
mode and the events can be scrolled with
z
and
é
.
Every event is displayed with “ALx” (x=1-8).
AL1 = most recent event.
If there are no events “---“ appears.