Evc; Foam Marker; After Spraying Is Completed; Disposal Of Unused And Residual Spray Solution - Hardi Navigator Series Maintenance And Service Manual

Problem
EVC operating unit
Operating unit not
functioning

Foam marker

Compressor will not
start
No liquid to foam
generator
Foam quality
inconsistent
Blob interval
inconsistent
Foam liquid in air lines
Probable cause
Blown fuse(s)
Wrong polarity
Valves not closing properly
No power
Poor power supply
Blown fuse
Defective relay
Blown fuse
Solenoid valve not opening
Filter blocked
Recommendations not followed
Adjustment valve gummed up
Non-return valve in line gummed up
HARDI NAVIGATOR
Control / Solution
Check mechanical function of microswitches
Use cleaning/lubricating agent if the switches do
not operate freely
Check motor (450 - 500 mA MAX)
Change motor if over
Brown = positive (+) Blue = Negative (-)
Check valve seals for obstructions
Check microswitch plate position
Loosen screws holding plate a ½ turn
Wrong polarity
Check that Brown is (+), Blue is (-)
Check printed circuit board for dry solder joints
or loose connections
Check fuse holder is tight around fuse
Check battery (must be 12 V) and wiring
Change external fuse
Open compressor box and check relay for
corrosion
Open compressor box and check fuse located
on printed circuit board
Check wiring at printed circuit board for corro-
sion or loose connections
Dismantle and clean
See Foam marker (P11 - Navigator Operators
Manual), and Foam Concentrate label.
Flush system
Dismantle and clean
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