Parker PST090, User Manual, Page: 6 / 84

English
4/6 PST 090-340
is symptomatic of poor drainage.
Th
is check of the timed drain opening (parameter d1 ).
Settings depends upon the operating conditions of the dryer and
varies the amount of condensate to be removed.
For standard dryer operating conditions, see the following table of
recommended settings:
Model Parameter d1
PST090-340 5
Parameter d1 : time open in seconds for every 2 minutes of opera-
tion.
c) EXTERNAL - if there is an external drain.
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.
To view the details of the event, press
x
:
ALx
1 Alarm code
2 Th
ousands of hours
3 Hours
4 Dew point
5 Evaporation temperature
6 Compressor discharge temperature
Scroll with
z
and
é
.
5.3 Parameters
Accessing parameters
Press
z
and at the same time
é
: the keypad now operates in
Parameters MENU mode and the parameters can be scrolled with
z
and
é
.
List of parameters
A1 Sets the unit of measure for dew point in °C or °F.
A2/A3 Total hours of dryer operation = A2
(display only).
A4/A5 Like A2/A3 but for hours of refrigeration compressor ope-
ration.
A6 Sets Hd Warning intervention temperature (see par. 5.4 in
List of alarm/warnings).
A7 Inhibits remote OFF command.
b1 Sets the dryer address for serial communications.
b2 Sets the serial communication speed.
b3 Not available
b5 Refrigerant evaporation temperature.
b7 Not available
b8 Compressor discharge (delivery) temperature.
b9 Not available
C5 Dryer model:
Mon = models PST090-390
MuL = models PST490-1980
Note : if the C5 is set to = MuL in a monocooler dryer then
the warning ASE will occur. ASE is a warning for the mul-
ticooler models..
C7 Sets compressor operation mode:
- CYC = CYCLING (energy saving enabled)..
- Con = CONTINUOUS (energy saving disabled)..
C36 Operating logic of the alarm/machine status relay.
0 = relay energised when dryer is running, de-energised if
in warning/alarm status.
1 = relay de-energised when dryer is running, energised if
in warning/alarm status.ù
2 = relay de-energised when dryer is not running,
energised when running.
C37 % energy saving.
d1 Sets the seconds of condensate drain opening (if set in TI-
MED mode).
d2 Like d1, but for seconds closed.
d3 ISets condensate drain operation mode:
- CAP = INTEGRATED
- tIM = TIMED
- Con = EXTERNAL (24VAC)
On the model PST090 , which does not includes the sensor B2, para-
meter C29 will also appear on display. Make sure that parameter C29 is
to set “0”.
Changing parameters
Aft er displaying the parameter, press
x
, change with
z
and
é
, ,
then press
x
to confi rm.
Press
y
to return to STANDARD mode.
5.4 Alarms and Warnings
Alarms cause the dryer to switch off .
Warnings only cause a signal.
In the case of Alarm or Dew Point Sensor Warning (dSE),
[
displays the alarm code. In the case of a Warning,
[
alternatively
displays the fault code and the dew point and WARNING LED comes
on.
If an alarm occurs:
a) Identify and eliminate the cause;
b) press
z
to reset the alarm;
c) press
x
to restart the dryer.
If a warning without automatic reset occurs:
a) identify and eliminate the cause
b) press
z
to reset the warning.
List of alarms/warnings
HP High Pressure Alarm
CP Phases monitor Alarm
LP Low Pressure Alarm
Ld Low Dew Point Alarm
Lt Low Evaporation Temperature Alarm
Ht High Compressor Discharge Temperature Alarm = T> 120°C.
rSE
Refrigerant Temperature Sensor Warning
Switches to CONTINUOUS mode.
drE
Condensate Drain Warning
Condensate drainage switches to TIMED mode.
dSE
Dew Point Sensor Warning
Th
e measured temperature must return within its normal ran-
ge.
Hd
High Dew Point Warning
Automatic reset when the dew point = A6 - 4°F (2°C).
HSE Discharge temperature sensor Warning
Sr
Scheduled Maintenance Warning
See par. 5.2 and 6.3