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Troubleshooting
14.2 Fault list
Table 9: Accumulator shut-off block fault list
Fault
Hydraulic accumulator
overload
Insufficient flow to the
hydraulic accumulator
Hydraulic accumulator
damaged, no pressure
accumulation
External leakage
Electro-magnetic relief
without function
Loud flow noises
Incomplete flow blocking
Bosch Rexroth AG, Accumulator shut-off block type ABZSS, 0532VAW, RE 50129-B/02.19
Possible cause
Inappropriate hydraulic fluid
Viscosity too high
Insufficient oil cleanliness
Tank line pressurized
Insufficient maximum securable flow
Pressure relief valve not switching
Oil supply
Leakage to the tank
Manual relief not closed completely
Manual relief leaking in closed condition
Electro-magnetic relief open
Electro-magnetic relief leaking in closed
condition
Electro-magnetic pressure maintenance
open
External leakage
Insufficient discharge oil limit
Leaking housing
Accumulator adapter leaking
Sealing surfaces contaminated or
damaged
Incorrect assembly
Electrical voltage supply
Air in the system
Manual relief not closed completely
Leakage at the system shut-off cock
Remedy
▶
For the admissible hydraulic fluid, refer to the data
sheet of the respective accumulator shut-off block, see
chapter 1.2 "Required and amending documentation".
▶
For the admissible hydraulic fluid, refer to the data
sheet of the respective accumulator shut-off block, see
chapter 1.2 "Required and amending documentation".
▶
For the admissible cleanliness class, refer to the data
sheet of the respective accumulator shut-off block, see
chapter 1.2 "Required and amending documentation".
▶
Return the depressurized tank line to the tank.
▶
For the maximum admissible flow, refer to the
characteristics specified in the data sheet of the
respective accumulator shut-off block, see chapter 1.2
"Required and amending documentation".
▶
Check the function of the type-examination tested
pressure relief valve.
▶
Switch on the pump.
▶
Select a suitable pressure relief valve the machine/
system according to the data sheets of the offered
accumulator shut-off block, see chapter 1.2 "Required
and amending documentation".
▶
Close the manual relief.
▶
Use a manual relief in original equipment quality.
▶
Control the electro-magnetic relief.
▶
Use an electro-magnetic relief in original equipment
quality.
▶
The control of the electro-magnetic pressure
maintenance shall be omitted (variant ABZSS...C).
▶
Use seals in original equipment quality.
▶
Limit the accumulation speed with an orifice.
▶
Use seals in original equipment quality.
▶
Use seals in original equipment quality.
▶
Insure that the sealing surfaces are clean and not
damaged.
▶
Have assembly only carried out by qualified, trained
and instructed specialists.
▶
Only use spare parts in original equipment quality.
▶
Check the voltage supply.
▶
Bleed the machine/system.
▶
Contact the machine/system manufacturer.
▶
Close the manual relief.
▶
Use a system shut-off cock in original equipment
quality.
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