ACR Faults
Symptom
Possible Cause
Solution
ACR ram does not raise/lower cluster
PCB output fault
Check bottom LED on control unit.
Change control unit lid
Solenoid valve fault
Check solenoid.
Check vacuum supply.
Wiring connection fault
Check wiring in connection box.
Check wiring in solenoid box.
Water in connection box
Check cable glands and lid seal.
Check internal connectors for water damage.
Change connectors.
No vacuum/vacuum always on at clawpiece
PCB output fault
Check top LED on control unit.
If light on vacuum should be on.
If light off vacuum should be off.
If faulty, change control lid.
Solenoid valve fault
Check solenoid.
Check vacuum supply.
Wiring connection fault
Check wiring in connection box.
Check wiring in solenoid box.
Shut-off valve always closed
Check shut-off valve
Milk tube disconnected
Reconnect milk tube
Milk tube or milk meter blockage
Clear blockage
Premature ACR operation
ACR setting incorrect
Check ACR setting
See ‘Meter Not Metering’ section
Cluster removed at end of milking too
ACR setting incorrect
Check ACR setting
soon or too late
Vacuum delay setting incorrect
Check vacuum delay setting
Innovation In and Out of Parlour
Milk Meter Fault Finding Scheme
10
| Milk Meter Service Manual | v1.2
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