Test Sequence for Diva and Phoenix water level electronic boxes
- From: Terry M <coffee@xxxxxxxxxxx>
- Date: Wed, 31 Aug 2005 00:37:03 GMT
As there are frequent questions about the old style UNIC water level
boxes I will give a useful test we worked out a few years ago.
The electronics are by Gicar, the same as almost all espresso
machines. They are no better or worse than those on other machines of
their era. Newer equipment has better electronics of course. The old
parts nunbers were DV02 for 230V and DV42 for 115V. The improved
series for the old machines added a 'X' after the number and the latest
boxes are 'XN'.
Test: Number all wires so you can put it back together. Test is easiest
with all wires removed from terminals and power supplied with a patch
cord.
connect appropriate power (115V or 230V) to terminals 2 and 3.
Measure output (in Volts AC)
115V box:
Terminals 1-4 =115V
1-5 =115V
1-6 = 12V
(the rest: 1-8, 1-9, and 1-10 will be 20V on all boxes)
Jump (short) 1' to 3' and you should read:
1-4 =12V
1-5 =12V
1-6 =12V
remove Jump 1'-3' and place Jump 2'-4' and you should read:
1-4 =115V
1-5 =115V
1-6 =115V
The 230V box tests the same just Input 230V to Terminals 2 and 4
and the readings will be similar to above except the 115V readings will
be 230V. The 12V and 20V readings will be the same.
Often the readings will not be exactly 12V or 20V but a volt or so
out. The 1'-3' jump simulates the water fill circuit and is the most
likely one to fail.
Terry M
.
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