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PENGUIN REFRIGERATION LTD
Unit 2b
Alexandria Park
Penner Road
T: 02392 453293 F: 02392 453293 E: [email protected]
www.penguinfrigo.co.uk
If, when the compressor attempts to start, the voltage reading drops
significantly, a bad electrical connection should be suspected. If the voltage
drop is sufficient to fall below the 10.5v (23v) cut-off built in to the controller,
the compressor will stop. (At this point the voltage may return to it s original
reading.) The fan or pump will continue to run for approx. 45 seconds and then
the compressor will attempt a re-start. If the voltage is then above 11.5v
(23.5v) the compressor will start or attempt to re-start again.
If the multi-meter being used is a digital model that is slow to
WARNING
react, the voltage may drop below 10.5v (23v) and then recover too quickly to
register on the meter. This can lead to the situation where the compressor
starts then stops from low voltage, the voltage returns to its original value, and
there being no significant drop on the meter.
If the compressor starts and runs OK but stops after a short while, the voltage
may be gradually dropping towards and below the 10.5v (23v) cut-off point.
This should be easily identified on the meter.
If the nature of the fault is such that the voltage reading at 5 above drops
below 10.5v (23v) even before the compressor attempts to start, a very bad
electrical connection must be suspected. This is because even the small load of
the fan or pump relay, both less than 0.5 amp (0.25 amp), is seemingly
sufficient to reduce the voltage considerably.
What to look for
A loose and/or high-resistance connection can be anywhere in the supply between
the batteries and the controller. i.e. a bad breaker or fuse, a loose or corroded
screw connection, a poorly made or corroded crimp connection, a damaged section
of wire, etc.
HINT
A good place to look first is the negative (ground) connection, especially on a
European-built boat. These tend to be multiple, common connections that
are added to over time.
2 Flashes Fan Greater 1 amp
a. Air cooled systems
The fan is faulty and drawing more than 1 amp.
Unplug the fan or water pump and restart the compressor.
For air cooled you will need to replace the fan:
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