Troubleshooting
Pumps Pumps
Pumps
Do Do
Do
Not Not
Not
Reverse Reverse
Reverse
Direction Direction
Direction
Forproportioningpumpstoreversedirection,the
proximityswitches(211)mustsensetheswitching
plate(319)toreversethedirectionalvalve(207).
DANGER DANGER
DANGER
SEVERE SEVERE
SEVERE
ELECTRIC ELECTRIC
ELECTRIC
SHOCK SHOCK
SHOCK
Thisequipmentcanbepoweredbymorethan
240V.Contactwiththisvoltagewillcausedeath
orseriousinjury.Whenaccessingtheelectrical
enclosurewhilepowerispresent:
•Donotmakecontactwithcomponentsorwires
unlessinstructedtodoso.
•Wearappropriatepersonalprotectiveequipment.
SeeElectricalSchematics,page102.
Theswitchingplatemovesfromsidetosideduring
operation.Keephandsawayfromtheswitching
plate,whilecheckingthefunctionalityofthe
directionalvalve,topreventpinchinghands.
1.Checkthefunctionalityofeachproximityswitch
(211).
a.Removethefrontcover.
b.Withthemotorpoweredoff,conrmthatthe
indicatinglightsonthebodyofeachproximity
switch(211)turnsonwhenametallicitem,
suchastheshaftofascrewdriver,isplaced
onthefaceofeachswitch.
c.Iftheindicatinglightsturnon,theproximity
switches,itswiring,andtheHCMarelikely
operatingcorrectly;proceedtostep2.Ifthe
indicatinglightsdonotturnon,proceedto
step6.
2.Conrmtheproximityswitches(211),switch
bracket(209),andswitchingplate(319)are
rmlymountedandnotdamaged.
3.Checkdistancebetweentheproximityswitches
(211)andtheswitchingplate(319).
a.Parkthepump.
b.Conrmthattheproximityswitch(211)
nearesttheA-sideofthepumpisbackedout
0.5to1.5turnsfrombeingincontactwiththe
switchingplate(319).
c.Disconnectthecablefromtheproximity
switch(211)nearesttheB-sideofthepump.
Operatethepumpuntiltheswitchingplate
(319)islocatedabovetheB-sideproximity
switch,thenturnoffthemotor/pump.
d.Conrmthattheproximityswitch(211)
nearesttheB-sideofthepumpisbackedout
0.5to1.5turnsfrombeingincontactwiththe
switchingplate(319).
e.ReconnectthecabletotheB-sideproximity
switch(219).
40 334946H