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62
Chapter 3. Sensors
LED
4
LED 3
LED 2
LED 1
Possible cause
Possible solution
off
off
off
off
No power
Check
power
connections.
Check fuse on main circuit
board. If blown replace with
20mm x5mm.
on
on
off
off
Bad
reference
position
check
Check reference micro-switch
on motor bracket.
If dam-
aged it may need to be re-
placed. Check set screw at-
taching rotating mechanism to
motor shaft is tightened on
the flat of the motor shaft. If
motor does not move at all
shortly after start up, check mo-
tor connection to main circuit
board. Possible bad motor or
motor controller on main circuit
board.
on
off
on
off
Communication
error
to
sensor board
Check connection from main
circuit board to sensor board.
Check for breaks in the blue
ribbon cable. May need to re-
place the sensor board.
Summary of Contents for HydroAct HA4
Page 1: ...HydroAct 4 User Manual Chemtrac Inc Firmware Version 1 19 November 15 2017...
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Page 42: ...42 Chapter 3 Sensors For safety and correct operation the sensor must be properly earthed...
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Page 93: ...III 6 Warranty 95 7 Returns 97 7 1 Contact Details Documentation...
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