Holder C270 - Faults of the working hydraulics

Fault Cause Remedy C250 ... C370
216 Translation of Original Operating Manual 156319-04
Faults of the working hydraulics
ADVICE
These notes apply only to valve assemblies that correspond to our circuit diagrams or have
been coordinated with Hydac.
Fault Cause Remedy
Control unit has no power Turn on master switch (rocker
switch)
Plug or cable kit defective Repair or replace plug, cable
1)
All hydraulic functions not active
Control unit defective Replace main relay
1)
Relay or proportional amplifier
defective
Replace relay, proportional ampli-
fier
1)
Plug or cable damaged Repair or replace
1)
Individual functions not active
Solenoid or valve defective Repair or replace
1)
Joystick defective Replace joystick
1)
Keys in joystick defective Send in joystick for repair or re-
place
1)
Joystick not working
Proportional amplifier defective Replace proportional amplifier
1)
Joystick and switch, key on con-
sole not working
Fault in the power supply Determine and rectify defect (ca-
ble break, contact problems)
Note: Despite the presence of
voltage in the idle state, the volt-
age may fail during operation
1)