Pentax HidroTanK-H1 Manuel D'instructions page 16

If there is a steady flow from the tap, and the pump runs uninterruptedly, the
commissioning procedure has been successful. If there is no continuous flow,
try to run the pump for a short while by holding down the RESET button. If the
problem persists, disconnect the Hidrotank-H1 device and repeat the whole
procedure.
10.PROTECTION AGAINST DRY RUNNING
If the pump stops running due to lack of water, the Red FAILURE light goes
on. To reset the system, press the RESET button or temporarily disconnected
the power supply, after confirming the presence of water on the suction side.
11.AUTOMATIC RESET
Should the pump stop running because of lack of water, the versions with
automatic reset (optional) begin to restart automatically at pre-set intervals of
15, 30 or 60 minutes, depending on the model. This operation mode is
indicated by the rapid flashing of the red indicator light. This process is
repeated until either there is new water available on the suction side of the
pump or else, the pump has reached the maximum number of pre-set retries
(2, 4 or 8 depending on the model). Should this limit be exceeded, the red
indicator light remains switched on. To reset the system, you must press the
RESET button after verifying the presence of water on the suction side.
12.MAINTENANCE
The device has been designed to provide maximum performance without the
need for special maintenance during its operational lifespan.
However, in particularly severe conditions of use, you may need to check, and
if necessary adjust, the pre-set pressure of the pressure tank. The inner
diaphragm of the pressure tank may also need to be replaced after prolonged,
extensive use.
12.A TO CHECK THE PRESET TANK PRESSURE
Make sure to disconnect the power supply and completely relieve the system
from the built-up hydraulic pressure by opening a tap. Unscrew the rear cap of
the pressure tank in order to gain access to the pressurization valve (fig. 05).
Adjust the pressure of the tank to the desired value, using an appropriate
compressed air source equipped with a pressure gauge.
The pre-set pressure should be adjusted to approximately 2/3 of the value of
the cut-in pressure of the Hidrotank-H1.
CAUTION: THE PRESSURE WITHIN THE PRESSURE TANK MUST
NEVER EXCEED 4 BAR. IT IS ADVISABLE TO USE A
COMPRESSOR WITH A PRESET OUTPUT PRESSURE NOT
EXCEEDING THE 4 BAR MAXIMUM VALUE TO AVOID THE RISK OF
EXPLOSION AND/OR INJURY!
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