T5 Between 20.0 And 28.0 Volts Dc; Power Logic Board X2/Pin 7 Diagram - Fresenius Medical Care 2008T Troubleshooting Manual

T- 2.0.5 T5 BETWEEN 20.0 AND 28.0 VOLTS DC
a) Call debug screen 0. If debug does not appear press 'Esc' then call screen 0.
b) Watching for one (1) minute, if Flow Error EVER = 1 OR a "No Water" alarm EVER appears DO NOT
troubleshoot temperature!
CAUTION!
c) The next measurement is from the Power Logic board's twenty-pin X2 cable, at
Pin 9, next door, is connected to 24 volts DC and
DAMAGE several boards!
1) Use the protected red meter lead!
2) Per the Figure below, place the lead horizontally onto pin 7
pins from the REAR of the machine). 4.0 volts DC or MORE?
Pin 7
Yes
Pin 7
No
To prevent this, TWO (2) precautions:
is 4.0 volts OR MORE! Proceed to
is LESS THAN 4.0 volts! See procedure number
Figure 45 - Power Logic Board X2 / Pin 7
2008T Troubleshooting Guide
P/N 490292 Rev. A
touching pins 7 and 9 together WILL
page 287
, procedure number
T- 2.0.6
pin 7.
(BOTTOM row, four
T- 2.1.0.
(page 286).
Page 285