ENGLISH
USER MANUAL
TROUBLESHOOTING
The following table shows the most common problems that may arise when using the machine, the possible causes and the suggested remedies to solve them.
NOTE
The sweeper is equipped with 3 “minitest” plugs (1, 2 and 3, Fig. AN) to measure the hydraulic pressure on the component.
WARNING!
The suggested remedies must be performed by qualified personnel, according to the instructions shown in this Manual, if present, otherwise contact a
For explanation or information, contact a Nilfi
PROBLEMS AND REMEDIES
Problem
BROOMS
Possible cause
Remedy
The brooms do not clean correctly | The brooms are not adjusted correctly | Adjust | |
| The broom speed is not correct | Adjust the speed | |
| There are oil leaks from the hydraulic system | Repair/replace | |
| fi ttings/hoses | ||
The brooms do not rotate |
| ||
The motor is faulty | Replace | ||
| |||
| The accessory system pump does not | Check the oil pressure in the hydraulic system | |
| pressurize the oil in the circuit | ||
|
| ||
SUCTION FAN |
|
| |
The suction fan is noisy | The motor is faulty | Repair | |
| The dust fi lters are clogged | Clean | |
| The suction pipe is clogged | Clean | |
| The suction pipe is cut/torn | Replace | |
The suction fan turns but it is not effi cient | The gasket between the suction inlet and the | Replace/adjust | |
| hopper is broken or misadjusted (replace or | ||
| adjust) |
| |
| There is no pressure at the suction system | Adjust the pump pressure | |
| motor | ||
|
| ||
| The control valve assembly is stuck | Repair | |
The suction fan does not turn | The motor is faulty | Replace | |
| Pump failure | Replace | |
SUCTION INLET AND SKIRT |
|
| |
The suction inlet does not collect debris | The suction fan is not engaged | Engage the suction fan | |
| Check the suction inlet and skirt height and | ||
effi ciently | The suction inlet position is incorrect | ||
operation | |||
|
| ||
| The control valve assembly is stuck | Repair | |
The suction inlet does not lift | The cylinder gaskets are worn | Overhaul the cylinder | |
| There is no pressure at the hydraulic system | Check the pump pressure | |
The suction inlet does not lower | There is no pressure at the parachute valve | Check the suction fan control valve assembly | |
pressure | |||
|
| ||
The skirt opening force is not suffi cient | The skirt opening pressure is incorrect | Adjust the opening pressure | |
The skirt does not open/close | The switch is deactivated | Activate | |
The solenoid valve is burnt | Replace | ||
|
34
RS 501
