SECTION 6 DHL HEATLESS REGENERATIVE DRYER
37
6.11 TEST
The dryer can operate following a diagnostic cycle,
with step-by-step operation, to make troubleshooting
or ordinary maintenance easier.
Through this operating cycle the dryer runs the nine
phases (from step 1 to step 9) that form the entire
operating cycle.
To access the TEST modality first set the relating
DIP-SWITCHES (DIP D1 and DIP D2) to position
ON; this condition will be displayed by the flashing
“OTEST” LED on the “Cycle mode” menu of the
instrument. The first LED indicating the first step
lights up on the DISPLAY; by pressing the key,
the dryer moves onto the following step until it
reaches step 10. By pressing the key again , the
dryer moves onto , the dryer starts from step 1 again.
Table 6-3 shows the various steps of the dryer.
Table 6-3: Dryer Steps
10 —10
All the LEDs Check operation of LEDs of SHDC-2100 device
9—9
Line
Pressure
Line
Pressure
Closed Closed Not powered Not powered
8—8
+
< 0.3 barg Line
Pressure
Open Closed Powered Not powered
7—7
Line
Pressure
Line
Pressure
Closed Closed Not powered Not powered
6—6
+
Line
Pressure
Line
Pressure
Closed Closed Not powered Not powered
5—5
Line
Pressure
Line
Pressure
Closed Closed Not powered Not powered
4—4
+
Line
Pressure
< 0.3 barg Closed Open Not powered Powered
3—3
Line
Pressure
Line
Pressure
Closed Closed Not powered Not powered
2—2
+
Line
Pressure
Line
Pressure
Closed Closed Not powered Not powered
1—1
No LED Start diagnostic cycle
STEP
LED On
on
DISPLAY
[On] A B PVA PVB PVA PVB
Status of LED Status of towers Purge solenoid valve
Purge solenoid
valve coil
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