Specifications

Technical description
26 DRYPOINT RA 80 – 720
5.17.2 ALARMS
Any alarm condition is indicated by the flashing of the [9] led "Alarm" and the DMC20 activates a buzzer tone in order to
alert the operator. The operator can stop the buzzer by pressing any key. The cause of the alarm will be displayed on
the upper line of the LCD display.
Alarm Message Cause Intervention Point
Intervention
Delay
Remarks
Protection Comp.
Thermal/electrical protection
of the compressor
- No delay The dryer is stopped
Protection Fan.
(Air-Cooled)
Thermal/electrical protection
of the fan
- No delay The dryer is stopped
STOP Compr.LP
PB Refrigerant low pressure
switch
R404A = 1.0 barg No delay The dryer is stopped
STOP Compr.HP
PA Refrigerant high pressure
switch
R404A = 32 barg No delay The dryer is stopped
Condens. HIGH
Condensation temperature too
high (probe T6)
50 - 70 °C
0.5-20
adjustable
The dryer is stopped
DewPoint LOW DewPoint low (probe T1) -10 - 0 °C
0.5-20
adjustable
The operator chooses
whether to stop dryer
DewPoint HIGH DewPoint high (probe T1) 10 - 20 °C
0.5-30 min
adjustable
The operator chooses
whether to stop dryer
Probe Fault One of the probes is faulty - No delay The dryer does not stop
STORING ALARMS IN MEMORY
When the “Automatic Start-Up” and “Reset ! Autom.” functions are deactivated (customer selected setting “no”),
any alarm causing the dryer to stop and any anomaly with one or more probes (Probe Fault) is stored in the memory of
DMC20. To reset the alarm memory the dryer is to be switched OFF (keep the button [15] "Dryer Stop" pressed for at
least 2 seconds). The dryer is then to be switched ON again (keep the button [14] "Dryer Start-up" pressed for at least 2
seconds); If the alarm is no longer in effect the dryer will run correctly, otherwise the alarm message will appear again.
When the “Automatic Start-Up” and “Reset ! Autom.” functions are activated (customer selected setting “yes”) any
alarm which has caused the stop of the dryer and any anomaly with one or more probes (Probe Fault) is automatically
reset once nominal conditions return and the dryer will run again automatically.
Any alarm, which is not causing the stop of the dryer, is reset automatically when nominal working conditions return.
5.17.3 SET-UP
The DMC20 is adjusted during the final test of the dryer. Where particular requirements concerning the operation or the
alarm management exist, the user can change the setting of the programmed parameters.
Set-up parameters are divided into two levels: anybody can access the level 1, while access to level 2 is reserved to
authorised personnel provided with the password.
To access to Set-up mode the [11] "Set-up access" button must be depressed for at least 2 seconds. Then it will be
possible to display the desired parameter using the [12] and [13] keys. To modify the displayed parameter, use the [12]
and [13] keys, while keeping the [11] key depressed.
During Set-up, the upper line of the display will display the selected parameter, while the lower line will show the current
value of the same parameter.
To exit Set-up mode, press simultaneously the [12] and [13] keys, or wait 20 seconds.
NOTE : The character “!” means “Alarm”
DESCRIPTION OF SET-UP PARAMETERS
LEVEL 1
• Pass Code? : The system asks for the password to access the level 2 of the programming parameters; If the
password is not modified or wrong, only the parameters of level 1 will be accessible; NOTE : The password can be
modified only when the dryer is in stand-by; therefore during operation, only the level 1 will be accessible.
• Language : It is possible to select the language for the alarm and dialogue messages