Fresenius Medical Care 2008K Troubleshooting Manual page 112

1.
Pin 6, at the Power Logic Board's end of the cable (top row, three pins from rear)
Pin 6 at the Power Control Board's end of the cable (bottom row, three pins from the left)
2.
Pin 7, at the Power Logic Board's end of the cable (bottom row, four pins from rear)
Pin 7 at the Power Control Board's end of the cable (top row, four pins from the left)
f) Is the meter's numeric AND units display, for both measurements,
indicating 2 or less?
Yes See procedure number
No Replace the power logic cable
T- 2.6.1 CHECK FOR AN 'OPEN' TRIAC
a) Plug the machine in. CAUTION!! 120 VOLTS NOW PRESENT!
b) Place the machine into Dialysis Program (remember to press the 'CONFIRM' key) and (IMPORTANT!)
wait 30 seconds.
c) Referring to Figure 47
~
measure AC ( ) voltage at the SOLDER (rear) side of the power
control board, BETWEEN connectors ST8 and ST11.
d) Greater than 90 volts AC?
Yes The triac is bad. Referring to
unplug the machine and replace it (trace the orange wire
from ST 9 to it). IMPORTANT NOTES! 1) The triac's
wires are position sensitive; 2) The bad triac probably
burned resistors R10 and R11 on the power control
board. It is probably necessary to replace the board.
No See procedure number
T- 2.7.0 CHECK HEATER CONNECTIONS (K1 AND K2)
a) Turn the machine off and UNPLUG it. CAUTION! Electrocution hazard if not unplugged!
b) Touch the meter leads together and subtract this value from subsequent resistance ( ) readings.
c) Referring to Figure 47
(rear) side of the power control board, BETWEEN connectors K1 and K2. Is
the meter's numeric AND units display indicating less than 20
Yes See procedure number
No Referring to the Figure (above, right), check the wires for an 'open circuit' between the
power control board K1 and K2 connections and the distribution board's 8-pin heater
connector.
T- 2.7.1 CHECK HEATER SWITCH
a) Referring to Figure 47
control board. Two measurements:
1. Between ST 7 AND ST 13
2. Between ST 4 AND ST5
b) Is the meter's numeric AND units display, for both measurements, indicating
less than 2 ?
AND
AND
T- 2.6.1 (page 110).
(page 109), CAREFULLY! (High Voltage),
Figure 51
T- 2.7.0 (page 110).
(page 109), measure resistance ( ), at the SOLDER
T- 2.7.1 (page 110).
(page 109), measure resistance ( ) on the SOLDER (rear) side of the power
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
(page 116),
?
Section 4 – Temperature Problems
Page 110