Vemco HR2, User Manual

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10.1 HR2 Receiver Related Troubleshooting
Find answers to HR2 common troubleshooting questions here.
10.1.1 The Threads Have Been Damaged
It’s critically important that the threads on the End Cap are not dented or the outer cylinder will not
thread onto the End Cap properly. If the threads are slightly dented, use a sharp knife, such as an X-Acto
knife, to remove the deformed plastic until the sides of the thread are smooth and below the normal line
of the thread.
It is important that there be nothing sticking out of the thread to damage the thread on the outer cylinder
or prevent the case from closing.
10.1.2 I Think The Case Might Be Pressurized
When handled correctly, the HR2 pressure case and seal have a static depth rating of 300 meters (440
psi) . If the receiver experiences pressure greater than this, water may enter the case.
NOTE:
Physical shocks to the receiver, such as bumping into a solid object, when
it is at any depth can result in a considerably higher pressure on the casing than just
the depth pressure. Also, if the O-rings or their mating surfaces are dirty or
damaged, then water may enter the receiver case. If water enters the receiver case
under high pressure and the Release Valve is unable to open and equalize the
pressures, then some water and compressed air may still remain in the case when it
is returned to the surface. This can be identified by its increased weight and a
sloshing sound when the case is moved. The HR2 case will also be very difficult to
open, if at all possible.
If you are suspicious there is compressed air in the receiver case, then check for air or water leaking
from seam in the case where the End Cap and outer cylinder meet.
To check for... Do this
Water leakage Dry the seam completely and watch for drops of water around the
seam.
Air leakage Spread soapy water around the seam and watch for bubbles indicating
air escaping.
If air and/or water are found leaking from the receiver case, do not attempt to remove the End Cap.
Instead, place the receiver in a safe place and cover it with a protective layer of towels, tarpaulins, etc.
until the leaking stops. If water is still in the case after the air and/or water have finished leaking from
the case, then attempt to open the case with the steel rod kit. If it will open, do so very slowly to allow
the compressed air to escape. If the case will not open using the steel rods, then it is under a greater
pressure than will allow the case to open.
Contact VEMCO for further instructions .
When the pressure has been released from the HR2 case, carefully unscrew the End Cap from the outer
cylinder (see
"Opening the HR2 Case", on page 144 ). Use fresh water to rinse the internal parts of the
HR2, while avoiding skin contact with any battery electrolyte that may have escaped from the battery.
Do not attempt to re-use the HR2 receiver after water has been inside the case. The internal casing
protecting the electronics is not waterproof and the electronics have been destroyed by contact with
water.
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HR2 Receiver User Guide