Fresenius Medical Care 2008K Troubleshooting Manual page 117

T- 4.1.0 CHECK TEMPERATURE
IMPORTANT!
a) From the Home screen, allow Temperature
to decrease to less than 40° C.
b) CAUTION! High Voltage! Referring to the Figure (right),
measure AC voltage
connector, between the: Old heater: BROWN and BLUE wires;
New heater: BLACK and WHITE wires.
c) IMPORTANT! ASSURING Temperature is LESS THAN 40° C is
the measurement greater than 90 volts AC?
Yes See procedure number
No NTC# 2 is bad (see
T- 4.2.0 CHECK POWER LOGIC BOARD
CAUTION!
DC Voltages will be measured at pins that are close together and 'shorting' them with a
regular meter probe may damage several boards. It is HIGHLY RECOMMENDED the Fluke TP 80
meter probe (or equivalent), together with the protective cap (see
a) Referring Figure 50
solder (rear) side pins are arranged in two rows. Even numbered (2, 4, 6, etc) pins are in the top row,
odd numbered (1, 3, 5, etc) in the bottom.
b) Using TP 80, measure DC voltage at the solder (rear) side of the 'X2' connector, pin 6 (top row, 3 pins
from rear of machine). Proceed accordingly:
Greater than 9.6 Volts: The power logic board is bad (see
Less than 3.6 Volts: See procedure number
Figure 50 – Card Cage /Power Logic Board (Pin 6)
T- 4.3.0 CHECK FOR A 'SHORTED' TRIAC
a) Turn the machine off and UNPLUG it. CAUTION!
Electrocution hazard if not unplugged!
b) Slide the power supply away from the cabinet. Un-mount the
power control board from its four plastic clips.
c) Referring to Figure (right), remove the two front screws and
lay the power supply's panel down to access to the rear
(solder) side of the board.
(~ V
), at the distribution board's heater
T- 4.2.0 (page 115).
Figure 6, page 13).
(page 115), at the top of the power logic board is the 20-pin 'X2' connector. The
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Figure
Figure 4A
T- 4.3.0 (page 115).
Section 4 – Temperature Problems
5, page 11) is used!
and NOTE B, page 8).
Page 115