DRUCKER DIAGNOSTICS
642M SERVICE MANUAL
SM023
REV C
4
5.
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
SOLUTION
The lid does not open.
No power
•
Check line cord
•
Check fuse in end of line cord.
Lid knob is not completely closed
Rotate the lid knob fully clockwise before pressing
the
‘OPEN’
button
Lid lock is active (Unlock timed out)
Press the
‘OPEN’
button to de-activate the lid lock
Lid tray is unplugged from control board or
defective
Check wiring
Control board is damaged
Replace Control board
To gain access to the rotor - Remove the
‘OPEN/CLOSE’
sticker and slide the lid latch lever
toward the front of the centrifuge. This will unlock
the lid.
PROBLEM
POSSIBLE CAUSE
SOLUTION
Excessive vibration
Rotor improperly loaded
Load equally filled tubes symmetrically in the rotor.
All carriers and/or tube holders must be present in
the rotor.
Debris lodged within the rotor or tube
carriers
Carefully inspect all rotor pockets, tube holders and
crevasses for debris, and clean thoroughly.
Centrifuge housing is loose
Tighten or replace screws
Missing/damaged feet
Replace feet
Motor failure
Replace motor
Rotor damaged
Replace rotor
PROBLEM
POSSIBLE CAUSE
SOLUTION
Rotor does not spin
No Power
•
Check line cord
•
Check fuse in end of line cord.
Lid not properly latched
Press down firmly on lid and rotate lid knob clockwise
until the
‘LATCHED’
light illuminates.
Internal connection failure
Check wiring
Control board failure
Replace control board
Motor Failure
Replace motor
PROBLEM
POSSIBLE CAUSE
SOLUTION
Clicking noise during braking
Rotor is loose
Tighten rotor nut
PROBLEM
POSSIBLE CAUSE
SOLUTION
Whistling noise while running
Debris in air intake / exhaust ports
Remove power before clearing debris.
Damaged gasket
Requires service
PROBLEM
POSSIBLE CAUSE
SOLUTION
Rotor speed is lower than
specified range
Rotor speed is calibrated at 13.8 VDC
Confirm source voltage meets or exceeds this value.
Motor speed will vary according to source voltage.
