P- F.8.0 St 12 Still Less Than 23.0 Volts - Fresenius Medical Care 2008K2 Troubleshooting Manual

P- F.8.0 ST 12 STILL LESS THAN 23.0 VOLTS

IMPORTANT! To avoid damage, turn the machine OFF!
a)
b) Figure below, unplug the modules ONLY,
IMPORTANT!
c) Reconnect the Actuator Cable!
IMPORTANT! Turn the machine on (fan running)!
d)
e) Measure again from the rear side of the Power Control Board's ST12 connector. More than 23.0 volts
DC now? TWO (2) possible scenarios:
1)
IF (and ONLY if) less than 23.0 volts! TWO (2) possible bad components: 1) Bad Power
Control board (inside the power supply) OR 2) Bad power supply.
2)
IF more than 23.0 volts! One of the modules (or its cable) may be bad. To locate the bad module
perform parts A THROUGH D below:
IMPORTANT! To prevent damage turn the machine off!
A)
B) Your choice, plug in one of the modules*.
C) Turn the machine on and measure again at ST12. If less than 23.0 volts the last module
plugged in is the problem.
D) Repeat parts A through C until you locate the bad module.
including the Blood Pressure module
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
!
Page 608