P- 1.0.9 X2 / Pin 3 Less Than 6.0 Volts/Isolate Main Relay (K1) - Fresenius Medical Care 2008K2 Troubleshooting Manual

P- 1.0.9 X2 / PIN 3 LESS THAN 6.0 VOLTS / ISOLATE MAIN RELAY (K1)
a) Turn the machine off and UNPLUG it.
b) Slide the power supply away from the cabinet to see
the Power Control board inside.
c) ENSURE the cables, along the top edge of the board,
are plugged in securely. If not this may be the
problem!
d) Un-mount the board from its four plastic clips.
e) Figure right, remove the two (2) front screws and lay
power supply rear panel down to access to the rear
(solder) side of the board.
IMPORTANT!
f) Plug the machine in.
CAUTION! High voltage now present!
Per the Figure below
g)
pin 1
connector at
Yes More than 6.0 volts! TWO (2) possible bad components: 1) Most likely the twenty-pin Power
Logic cable (X2) OR; 2) Main Relay K1 OR possibly its four-pin cable
No Less than 6.0 volts! Unplug the machine then TWO (2) possible bad components: 1) Most
likely, bad main Relay K1 (possibly it four-pin cable)
1
To LOCATE K1 and its cable refer to
Figure 125 – Power Control Board / X3 Connector, Pin 1
CAUTION!
, measure from the rear side of the Power Control board's four-pin X3
. More than 6.0 volts DC?
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
Electrocution hazard if not unplugged!
1
OR 2) Bad Power Control board.
Figure 132 (page 651).
Figure 124
1
.
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