HYDAC International MAFH-A, Operating Maintenance And Troubleshooting Manual

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User Manual MAFH-A L-4425
HYDAC En 15
Appendix 4A - Troubleshooting
Problem Cause Solution
Unit is connected to power source but
motors will not start.
Tripped Circuit Breaker
Reset Motor circuit breakers (CB1P
and CB2P)
The pumps’ overload has tripped.
Verify wiring, checking for short
circuits or damaged wires.
Reset overload.
No Inlet Flow
The system is running but there is little
or no flow into the vacuum chamber.
Verify that the inlet to the system is not
blocked.
Verify that the oil being dehydrated is
within the acceptable viscosity range.
Air Leak in suction hose
Inspect hose for cracks or cuts.
Check for loose inlet fittings. Repair or
replace as needed.
Faulty Inlet solenoid valve
Verify proper operation of the inlet
solenoid or replace.
Pump not priming
Eliminate restriction or add some fluid
to inlet hose and elevate to prime dry
pump.
Eliminate excess fittings, valved
couplings, or any other source of high
differential pressure.
Heat fluid until maximum rated fluid
viscosity of unit is reached.
No Discharge Flow
The system is running but there is little
or no flow out of the vacuum chamber.
Verify that the system discharge is not
blocked.
Faulty discharge solenoid valve
Verify proper operation of the
discharge solenoid or replace.
“CHANGE FILTER” Light is
illuminated.
Element has reached a bypass or
clogged condition.
Replace Particulate Filter Element
Excessive discharge fluid
pressure
Fluid viscosity high
Heat fluid until maximum rated fluid
viscosity of unit is reached.
Discharge line restriction
Eliminate excess fittings, valved
couplings, or any other source of high
differential pressure.
Excessive pump noise or decreased
system flow
Pump is worn Replace Pump
Obstruction in the suction line
Check the suction line fittings and
eliminate restrictions
Open external suction shutoff valve if
installed
Excessive suction fluid pressure
Fluid viscosity high
Heat fluid until maximum rated fluid
viscosity of unit is reached.
Suction line restriction
Eliminate excess fittings, valved
couplings, or any other source of high
differential pressure.
Blocked suction element Remove and clean suction elements