Hard Reset; Stopping The Equipment And Depressurising - Parker 20H-MD Guide D'utilisation

4.4 Hard Reset

If a critical error occurs an error lock menu will be displayed and the generator will need to be hard reset. If an overpressure, H
blocked error occurs, the generator will need to be hard reset once the problem has been resolved. This will also be the case if the same error
is reset 3 times consecutively.
Before a hard reset is performed the initial fault must be rectified; refer to "Error Messages" on page 20 for guidance. When the faults are
rectified, switch the generator off at the mains switch.
Press and hold . At the same time reapply the power to the generator. When the generator has powered up press
generator will reset all errors then continue with the normal start up procedure.

4.5 Stopping the equipment and depressurising

Ensure that the generator is fully depressurised prior to shipment or servicing.
1 Ensure that the application instrumentation no longer requires hydrogen.
2 From the default menu press and hold the
standby menu as shown. This indicates that hydrogen is no longer being supplied to the
application.
Close the outlet isolation valve (if fitted) and carefully disconnect the piping from the hydrogen outlet.
Hydrogen gas will escape under pressure when the piping is disconnected.
3 Press and hold and
generator.
The display will alternate between"XXX Bar" and"DEPRESSURISING" ("XXX" denotes
the current pressure).
Note: To increase the rate of depressurisation, press the
outlet valve. Press the
4 Once the generator is completely depressurised the display will change as shown. The
system will then become sealed to prevent contamination.
5 Switch the generator off at the mains switch and disconnect it from the electrical supply.
6 If the generator is to be transported drain the water from the generator as described in
section 6. Refit the hydrogen outlet port cover and the three transit plugs to the O
excess H vent and the water bottle vent.
2
key. The default menu will change to the
to open the H purge valve and depressurise the
2
key again to close the valve.
key. This will open the H
2
vent,
2
or O vent
2 2
again. The
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