P- 1.2.0 Pin 4 Less Than 10 Volts/Isolate Main Line Fuses 6.3 Amp Fuses; P- 1.2.1 Both Fuses Less Than 1.0 Ohm/Isolate Incoming (Line) Voltage - Fresenius Medical Care 2008K2 Troubleshooting Manual

P- 1.2.0 PIN 4 LESS THAN 10 VOLTS / ISOLATE MAIN LINE FUSES 6.3 AMP FUSES
Unplug the machine! CAUTION!
a)
b) IMPORTANT! Set your CALIBRATED volt meter to RESISTANCE (Ω)!
c) To determine the meter's resistance touch its leads together. The meter MUST read less than 1.0
Subtract this reading from all subsequent measurements!
d) On the Power Control board, per the
NOTE: "OL" = bad fuse!
Figure 127 – Power Control Board / Fuses S12 and S16 / ST2 and ST1
e) Are BOTH fuses less than 1.0
BOTH less than 1.0 Ω! See procedure number
Yes
One or both fuses MORE THAN 1.0 Ω or "OL"! Proceed to
No
P- 1.2.2.
P- 1.2.1 BOTH FUSES LESS THAN 1.0 Ω / ISOLATE INCOMING (LINE) VOLTAGE
a) Plug the machine in
IMPORTANT!
b) ENSURE the Power Supply's Main Power Switch is ON (i.e. rocker switch pushed into
the "1" position)!
Parts c through e next page
Electrocution hazard if not unplugged!
Figure below
Ω
?
. Caution! High Voltage now present!
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
ACROSS
, measure
P- 1.2.1 (page 635).
page 637,
Ω
!
BOTH 6.3 Amp fuses.
procedure number
Page 635