Parker 250 - Page 6

250 4
English
To view the details of the event, press
x
:
ALx
1 Alarm code
2  ousands of hours
3 Hours
4 Dew point
5 Evaporation temperature
6 Compressor discharge temperature
Scrollwith
z
and
é
.
5.3 Parameters
Accessing parameters
Press
z
and at the same time
é
: the keypad now operates in Pa-
rameters 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= A3x1000+A2(display only).
A4/A5 Like A2/A3 but for hours of refrigeration compressor opera-
tion.
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
250
Mul = models
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 Not available
C29 Must be set to “0”.
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.
2 = relay de-energised when dryer is running, energised
in warning/alarm status.
C37 Not available
d1 Sets the seconds of condensate drain opening (if set in
TIMED mode).
d2 Like d1, but for seconds closed.
d3 Sets condensate drain operation mode:
- tIM = TIMED
- Con = EXTERNAL (24VAC)
Changing parameters
A er displaying the parameter, press
x
, change with
z
and
é
,
then press
x
to con rm.
Press
y
to return to STANDARD mode.
5.4 Alarms and Warnings
Alarms cause the dryer to switch o .
Warnings only cause a signal.
In case of Alarm or Dew Point Sensor Warning (dSE),
[
display
the alarm code. In case of a Warning,
[
alternatively displays the
fault code and the dew point and WARNING LED comes on.
If an alarm occurs:
1) Identify and eliminate the cause;
2)press
z
to reset the alarm;
3) press
x
to restart the dryer.
If a warning without automatic reset occurs:
1) Identify and eliminate the cause;
2)press
z
to reset the warning.
List of alarm/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>248° F
(120°C)
dSE Dew Point Sensor Warning
 e measured temperature must return within its normal
range.
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
.