Nederman L-PAK Series, Original Instruction Manual

Page: 7 / 18

L-PAK 150/250 Advanced
7
EN
4.2 Unit operation modes
L-PAK 150/250 Advanced has the following four operation modes:
1.
Off mode
2. Standby mode
3.
Running mode
4.
Idling mode
See Section
5.1. Status messages
for more information about each mode.
How the unit moves from one operation mode to another is explained below.
See also Figure 1 for a flow chart showing how the unit goes through its four
different operation modes.
When the unit is in Off mode, the unit can be put into Standby mode (the
unit is ready) with its motor off and the Filter Cleaning Valve (FCV) closed by
pressing the Standby/Running button. While the unit is in Standby mode, the
unit can be put back into Off mode again by pressing the Standby/Running
button.
NOTE!
If power is lost to the unit, for example if there is a power outage, and
Zero voltage detection is set to OFF see page
16
, the unit goes immediately
back into Standby mode once power is resumed without having to push the
Standby/Running button.
The unit goes from Standby mode into Running mode when it receives a pilot
signal by a valve being opened at one or more work stations (in other words,
someone starts to work). The unit’s motor is now on and the FCV is closed. The
DIR_Time and SSR_Time timers are not started, see Sections
6.2.4. DIR_Time
and
6.2.5. SSR_Time
.
The unit stays in Running mode as long as there is an active pilot signal.
However, the unit can still be put into Off mode by pressing the Standby/
Running button.
Note that if only one workstation is connected to the unit, or if only one work
station is in use and work stops at that one station, the pilot signal stops. If
there is more than one work station connected to the unit, and more than
one work station is in use, the pilot signal only stops if work stops at all
workstations (in other words, all valves close).
When the pilot signal stops, the DIR and SSR timers start. If work resumes at
one or more work stations within 10 seconds, the unit stays in Running mode.
The DIR and SSR timers are reset back to zero and are stopped.
If DIR_Time is set for 10 seconds (default), and the pause in work is longer
than 10 seconds, DIR_Time elapses. The unit then goes into Idling mode with
its motor on and the FCV open.
If a new pilot signal is sent within 12 minutes, the unit goes back into Running
mode. The DIR and SSR timers are again reset to zero and are stopped.
However, if SSR_Time is set for 12 minutes, which is the default setting, and
there is no new pilot signal within 12 minutes, SSR_Time also elapses.
The unit then goes into Standby mode until it either receives a new pilot signal
that puts the unit back into Running mode, or the unit is turned off (in other
words, put into Off mode) by the weekly timer, see 6.2.2. Weekly timer , or by
pressing the Standby/Running button.