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Operation
D396-14-880 Issue J
4.6 The hours counter (EXC300 only)
The EXC300 Controller has an hours counter (see Figure 13) which shows the number of hours that the Controller has
operated an EXT pump.
The hours counter has a 7-digit display (with no decimal point), on which:
z the left-hand 5 digits (2) show the whole numbers of hours
z the right-hand two digits (3) show the tenths and hundredths of hours.
For example, if the hours counter shows "0010375", this indicates that the EXT pump has been operating for 103 hours
and 45 minutes.
Figure 13 - Hours counter (EXC300 only)
4.7 Normal shutdown
Use the following procedure to shut down your system. This procedure assumes that you will manually operate the
vent-valve and the backing pump, however you can configure all EXC Controllers to automatically operate the vent-
valve and you can configure the EXC120, EXC300 and EXC300M Controllers to automatically operate the backing pump
(refer to Section 3.13).
1. Select Stop:
z On the EXC120, EXC300 and EXC300M Controllers, press the Start/Stop button on the front panel of the
Controller (Figures 1 and 2, item 4) or open the Start/Stop input on the logic interface connector (see
Section 1.7.3).
z On the EXC120E Controller, open the Start/Stop input on the logic interface connector (see Section 1.7.3).
2. Open the vent-valve before the EXT pump speed is below 50% of full rotational speed.
3. Switch off the backing pump.
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