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21
CLEMENTS
Error Conditions
Fuse Replacement
1. Switch off mains power to centrifuge using switch on rear
panel.
2. Remove power cable from centrifuge IEC mains power inlet.
3. Slide out fuse holder and remove blown fuse from U-shaped
holder.
4. Replace fuse with one matching fuse rating on rating label.
(A spare fuse is normally fitted to the fuse holder.)
Error Conditions
Error Code Fault
Action
E4
Lid not closed when
S
TART
button pressed
Close lid.
Adjust
Lid Closed
limit
switch.
E6
Overspeed condition:
Incorrect rotor setting
Power control PCB fault
Motor fault
++
SWITCH OFF
++
Verify correct rotor setting
Replace power PCB
Replace motor
E7
Underspeed condition:
Mains power fault
Power control PCB fault
Tachometer circuit fault
++
SWITCH OFF
++
Check transformer
Replace power control PCB
Check tachometer circuit
E9
Communication fault:
Fault in cable between
display PCB and power
control PCB
++
SWITCH OFF
++
Check cable and connections
Note:
When error conditions E6, E7 or E9 occur,
the centrifuge must be SWITCHED OFF and
the fault corrected before proceeding.