Function; Changing Fuses - B. Braun Aesculap ElanEC GA835 Serviceanleitung

ELANEC GA830 / GA835
8.2.3

Function

The coolant pump is controlled and regulated by card
GA835801.
The entire board is activated by the "Pump on" switch on
the foot controller AND the pedal activation for
controlling the EC motor.
7 7 7 7
Caution!
Electric shock hazard!
In case of measuring being carried out on an open
device, the device must be operated with an isolating
transformer.
Functional test:
Measuring
points: P12-1
potential 0V
P2-1
when pump is activated
When the pump is activated, the pump output is
infinitely variable with the potentiometer on the front of
the device.
Functional test:
Measuring
points: P12-1
potential 0V
P2-9
(depending on potentiometer setting)
Functional test of pump motor:
Remove connector P3
Connect motor to separate laboratory power supply.
Voltage: max. 24V
(on motherboard): reference
(GA835801): approx.
(on motherboard): reference
(GA835801): 0V to
9

Changing fuses

7 7 7 7
Caution!
Ø The following work may only be carried out after
the device has been disconnected from the mains,
as contact parts may contain hazardous voltages.
12V
Note
Always change both fuses at the same time.
Prescribed fuses:
2 off T4.0A breaking capacity L .
These fuses can be ordered from the manufacturer as
item number TA020436.
Ø Release catch on fuse holder with suitable
screwdriver.
21V
Ø Pull out fuse holder.
Ø Replace both fuses
Ø Insert fuse holder until audible engagement of catch.
GB
30