Aquair 100
TM
Manual
© Ampair
®
, 2007
www.ampair.com
Page 22 of 23
that the timing marks on the body junction line coincide. If the “cogging” or breakout torque has been
correctly minimised, 12 minor and equal “lumps” of resistance per revolution will be felt when turning
the shaft by hand. This resistance should not exceed 2kg-cm (30oz-in). When doing this make sure that
the output leads are not shorted together.
Reduced output:
Possible faults to consider if reduced output is suspected: Poor or corroded wiring
connections. Inspect all the screw terminals in the Aquair circuit for signs of fatigue or corrosion (the
commonest cause of reduced output is corroded wiring between generator & battery).
A simple method of checking the machines output is to disconnect it from the battery and short together
its output leads whilst turning the shaft by hand. A marked increase in resistance to turning should be
felt as the shorting takes place.
Faulty stator:
Check AC input to rectifiers or check for coil continuity and isolation from the case. The
resistance should be less than 2 ohms (approx. 6 ohms 24V units). Stator replacement involves baking
in an oven to break the adhesive bond and is best undertaken at the factory.
Rectifiers:
The rectifiers are located in the small box on the back of the Aquair body. To inspect them,
remove the four screws and the plate. This has been sealed with polyurethane sealant. The sealant
must be renewed on re-assembly after the mating faces have been cleaned. Damp, salt laden air will
be sucked inside the generator if the seal is not effective.
Figure 19. Aquair 100 Internal Wiring Diagram
RECTIFIER DIODE TEST:
This test will show if the rectifier diodes are either open or short circuit. If your multi-meter has a
diode check feature, select this (if not select the highest resistance range). Connect the meter
leads to the DC output and note the reading. Now reverse the connections.
MULTIMETER SETTING
METER LEAD POSITION
DIODE TEST
OHMS x 100
CONCLUSION
No reading
or
Many Megohms*
OK
RED meter lead to positive
Reading
or
Low resistance
Failed
1.2V (two diode
drops)
or
Markedly less*
OK
BLACK meter lead to positive
No reading
or
High resistance
Failed
*This test is not as conclusive as the diode test method, however, provided the first reading is a
very high resistance and the second reading far lower, then the test is valid. Actual values will
depend on the voltage supplied by the particular meter for its resistance ranges and some
meters cannot check 2 diodes in series.
To replace faulty rectifiers unsolder the common links between the rectifier DC outputs and check
outputs separately. If a new rectifier has to be fitted, scrape the enamel off the stator wires before
soldering and re-sleeve.
