T- 2.0.5 T5 Between 20.0 And 28 Volts Dc - Fresenius Medical Care 2008K2 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 'Escape' 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 meter lead horizontally onto pin 7
four 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
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
touching pins 7 and 9 together WILL
page 269
, procedure number
T- 2.0.6
pin 7.
(BOTTOM row,
T- 2.1.0.
(page 268).
Page 267