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SUPERNOVA FAULT FINDING GUIDE
CAUTION - Repairs should only be carried out by a QUALIFIED AND FULLY TRAINED PERSON !
PROBLEM
VACUUM VALVE
Vacuum valve, item (8) has an air flow leak
Vacuum valve, item (8) not functioning
PULL CABLE MECHANISM
Direction control lever arm, item (20), does not lock in
the up position
Pull cable item (23) jumps out of pull cable cam item
(18) in down position
BRUSH MOTOR REVERSE
Brush motor fails to reverse when direction control
lever arm, item (20) is in the up (backward) position.
Brush motor fails to reverse when direction control
lever arm, item (20) is in the down (forward) position.
Polaris & Supernova Manual.doc 1/1/12
POSSIBLE CAUSE
1.
Vacuum valve out of adjustment causing seal,
item (15), to be incorrectly positioned. Re-adjust
(see vacuum valve pull cable adjustment
procedure)
2.
Damaged or worn vacuum valve seal, item (15)
3.
Broken vacuum valve pull cable, item (23)
4.
Loose or broken vacuum valve pull springs, item
(25)
5.
Damaged vacuum valve guide face gasket, item
(15)
6.
Damaged vacuum valve pressure balls, item (12),
or vacuum valve pressure ball springs, item (13)
1.
Vacuum valve springs, item (25), not connected or
broken
2.
Broken pull cable, item (23)
1.
One or both shaft collar set screws, item (22) are
loose. Re-tighten set screws.
2.
Too much clearance between pull cable cam, item
(18) and stop bracket item (28). Add spacers, item
(17) as required to bring cam flush with stop
bracket.
3.
Damaged plunger item (19)
1.
Loose or broken vacuum valve springs item (25).
Reconnect or replace springs.
2.
Vacuum valve item (8) is too low when in up
position. Readjust (see vacuum valve pull cable
adjustment procedure)
1.
Vacuum valve item (8) does not reach its normal
up position. Adjust the pull cable jacket, item (1)
and switches, item (11) as shown in the
adjustment instruction section.
2.
Defective reverse switch item (11)
3.
Loose switch connector, item (26). Check colour
coding before re-connecting terminals. Replace
wire assembly if necessary.
1.
Vacuum valve, item (8) does not reach its normal
down position. Adjust the pull cable jacket, item (1)
and switches, item (11) as shown in the
adjustment instruction section. Remove any dirt or
foreign objects from between the vacuum valve,
item (16) in down position and the bumper, item
(29). Replace vacuum valve springs, item (25) if
broken or stretched.
2.
Defective reverse switch item (11)
3.
Loose switch connector, item (26). Check colour
coding before re-connecting terminals. Replace
wire assembly if necessary.
Page 16 of 45
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