Jungheinrich DFG 660, Operating Instructions Manual

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9.2 Troubleshooting
This chapter enables the operator to localize and rectify basic faults or the results of
incorrect operation himself. When trying to locate a fault, proceed in the order shown
in the remedy table.
Z
If, after carrying out the following remedial action, the truck cannot be restored to
operation or if a fault in the electronics system is displayed with a corresponding
error code, contact the manufacturer’s service department.
Troubleshooting must only be performed by the manufacturer’s customer service
department. The manufacturer has a service department specially trained for these
tasks.
In order for customer services to react quickly and specifically to the fault, the
following information is essential:
- Truck serial number
- Event message from the display unit (if applicable)
- Error description
- Current location of truck.
Fault Possible cause Remedy
Starter motor
is not working Battery isolator is not
switched on Switch on the battery isolator
Faulty fuse Check fuses
Battery charge too low Check battery charge, charge battery if
necessary
Battery terminal cable
loose or terminals
oxidized Clean and grease terminals, tighten battery
terminal cable
Motor does
not start Air filter contaminated Clean / replace air filter
Fuel filter clogged
Replace the fuel filter
Gear oil
temperature
indicator
flashing Gear oil too hot Motor speed is automatically reduced
Motor running
but truck does
not travel Travel direction lever in
neutral position Set travel direction lever to the required
travel direction
Parking brake applied Release the parking brake
Lift speed too
low Hydraulic reservoir oil
level too low Check hydraulic oil, top up if necessary
Hydraulic reservoir
discharge system
contaminated or
clogged Clean / replace hydraulic reservoir discharge
system
Load cannot
be raised to
max. height Hydraulic reservoir oil
level too low Check hydraulic oil, top up if necessary
Excessive
steering play Air in steering system Check hydraulic oil level and top up if
necessary, then turn the steering wheel
several times from one end stop to the other.