Installation, Operation and Maintenance Manual
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9. MAINTENANCE
In general the TCB control box does not require any maintenance. There are some items however
that need to be checked on a regular basis:
In-line Micrafilters in the air lines: when these are very dirty, there will be a pressure drop
over them, making the differential pressure measurement over the elements unreliable.
Air lines and cable glands to and from control box should be checked for damage and/or
tightness. If these become loose, the values shown on the display may not be accurate,
and possibly powder or moisture will be able to enter the enclosure causing damages and
possible short-circuits.
The clock on the front PCB has a CR 2032 battery. This battery will deplete over time and
needs to be changed as soon as the alarm message is displayed. In order to do this, the
cover over the front PCB needs to be removed first. Make sure to mount the battery with
the ‘+’ side facing to the right of the PCB.
Re-set the time and date after replacing the battery.
Figure 4: Display PCB battery
10. OPTIONSANDFEATURES
In addition to the features already described, the Total Control Board has some extra options and
settings built-in to provide additional functions and data recording / information retrieval capabilities.
These following options can only be accessed and installed by a Nordson representative, so please
consult your local Nordson representative for more information.
Forced cleaning time: initiates a forced cleaning cycle at a specified time interval.
Fan run-on time: fan set remains activated during a certain period after system is switched
off.
Optional input signal: possibility to initiate for example an alarm to stop cleaning cycle.
Optional output signal: possibility to start for example a rotary airlock on off-line cleaning.
DeltaP sensor type: possibility to measure DeltaP over filter elements by a 4-20 mA
pressure transducer.
Thermistor module for fan motor protection.
4-20mA Output proportional to measured pressure drop.
The options mentioned above can also cause alarm messages to be displayed on the TCB.
Relieving the alarm is done in the same way by pressing the ENTER button after correcting
the input to the control board.
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