Pfeiffer Vacuum A 1204H, Operating Instructions Manual

Page: 41 / 92

Advanced settings
41
A pre-alarm message appears but the pump doesn’t stop.
7.7 Management of an inlet isolation valve
The inlet isolation valve is used to isolate the pump it in the pumping line. A J4 connector
(see 8.5) is used to supply and manage an inlet isolation valve (accessory).
7.7.1 Management modes
The management mode is selected when the pump is stopped:
– from HHR [DEFINITION] [INLET VALVE] (see 8.2) ,
– from serial link (see Serial link Operating instructions).
DESABLED No isolation valve management (no isolation valve fitted to the inlet).
AUTO INLET The isolation valve is controlled automatically by the pump when it stops or starts.
When the pump starts, the valve opens 3 seconds after the message RUNNING FIXED
SPEED is displayed on HHR.
When the pump stops, the valve closes immediately, then the pump stops after a delay
of 3 seconds.
MANU. INLET The isolation valve is controlled by the selected control mode set in menu [DEFINITION]
[CONTROL MODE] :
– from HHR with AUX button (see 4.3) ,
– from J1 remote control connector (see 8.3) ,
– from serial link (see Serial link Operating instructions).
The valve control can be activated when the pump is stopped or running.
Control by the AUX button
The contacts J1-S1 and J1-S7 must be closed (see 8.3.2) .
Press the AUX button on the HHR and confirm with ENTER to open or close the valve.
Control from the user’s equipment (REMOTE mode: J1)
The contact J1-S1 is open and the contact J1-S7 is closed (see 8.3.2) .
– The valve closes if the J1-S6 contact is closed.
– The valve opens if the J1-S6 contact is open.
Control from serial link
The serial link valve opening/closing command is only taken into account if the J1-
S7contact is closed.
Temperature
Time
Thermal safety
No message
Warning message
Pre-alarm message
T. pre-alarm
Time
3s 3s
1
0
START STOP
Isolation valve
Pump