10.68 10.68 Electrical Electrical systemsystem
The pump motor only runs at a low speed with a ticking noiseThe pump motor only runs at a low speed with a ticking noise..
1. Are the motor cables correctly1. Are the motor cables correctly
connected and make good contactconnected and make good contact
between the pump motor and the pumpbetween the pump motor and the pump
regulator?regulator?
šš
NoNo
Tighten the connections or replace theTighten the connections or replace the
motor cables.motor cables.
YYeses
2. Switch the regulators. Note that in2. Switch the regulators. Note that in
most cases the drive and pumpmost cases the drive and pump
regulators can be switched with eachregulators can be switched with each
other for test purposes. First check thatother for test purposes. First check that
the article numbers correspond withthe article numbers correspond with
each other.each other.
šš
NOTE!NOTE!
If you cannot switch the regulators goIf you cannot switch the regulators go
to point 4.to point 4.
3. Is there still a fault with the pump3. Is there still a fault with the pump
motor system.motor system.
šš
NoNo
Change the pump regulator that is nowChange the pump regulator that is now
fitted in the drive regulator's place.fitted in the drive regulator's place.
YYeses
4. Is the voltage on the motor cable4. Is the voltage on the motor cable
between M2.1 and M2.2 approx. 12Vbetween M2.1 and M2.2 approx. 12V
DC?DC?
šš
NoNo
Go to point 8 below.Go to point 8 below.
YYeses
5. Is the voltage at E2 K1.5 and E25. Is the voltage at E2 K1.5 and E2
K1.6 approx. 4V DC with E2 K1.4 as aK1.6 approx. 4V DC with E2 K1.4 as a
reference when the motor rotates?reference when the motor rotates?
Alternatively 0V or 8V DC when theAlternatively 0V or 8V DC when the
motor is at a standstill?motor is at a standstill?
šš
NoNo
After checking the pump regulator'sAfter checking the pump regulator's
connections, change the pumpconnections, change the pump
regulator.regulator.
YYeses
6. Is the voltage at M2.3 and M2.46. Is the voltage at M2.3 and M2.4
approx. 4 V DC with M2.2 as aapprox. 4 V DC with M2.2 as a
reference when the motor rotates?reference when the motor rotates?
Alternatively 0V or 8V DC when theAlternatively 0V or 8V DC when the
motor is at a standstill?motor is at a standstill?
šš
NoNo
After checking the motor's connectorAfter checking the motor's connector
connections, change the pump motor.connections, change the pump motor.
YYeses
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