Troubleshooting - Robuschi Robox Evolution RB-DV Operating And Maintenance Instructions Manual

7 TROUBLESHOOTING

Operating problems
The motor does not start up and there is no noise
The motor does not start up, but humming noise heard
Automatic cut off just after start up
Inlet pressure different from the rated value
Capacity zero
WARNING : STOP ROBOX DV IMMEDIATELY
Outlet pressure different from the rated value
WARNING : STOP ROBOX DV IMMEDIATELY
Outlet temperature different from the rated value
WARNING : STOP ROBOX DV IMMEDIATELY
High absorbed power
Oil and/or liquid leakage
High oil temperature
Unusual noises and/or vibrations
WARNING : STOP ROBOX DV IMMEDIATELY
Relief valve does not close
Pos
1 At least two of electric connections have been cut
off
2 One electric connection has been cut off
3 Incorrect electric connection
4 Faulty motor
5 Rotors making contact
6 Scale deposits in the compression chamber
7 Intake of foreign particles
8 Rotors are worn
9 Bearing are worn
10 Gaskets are worn
11 Drive shaft seal is worn
12 Oil level plugs are broken
13 Injection filter clogged
14 Inlet piping is clogged
15 Outlet piping is clogged
16 Shut-off valve closed
17 Wrong relief valve setting
18 Small pipe line section
19 Wrong transmission ratio
20 V-belts drive
21 Wrong direction of rotation
22 High oil level
23 Motor securing
25 ROBOX DV securing
(1) See the repair manual
(2) Check the plant
Cause
1-3-4
2-3-4-5-6-7
3-4-5-6-7-14-15-16
14-16
14-15-16-17-18-19-20-21
14-15-16
13-14-15-16-17-18-19-20
3-5-6-7-14-15-16-18-19-20
5-10-11-12-22
5-6-9-14-15-16-18-22
5-6-7-8-9-23-24
14-16-17-18-19-20
Solution
Check the fuses, terminal boards and connection
cables and if required replace them
Check electric system
Check the electric motor
Check the internal clearances of the rotors and of
the gears
Clean the compression chamber and the rotors
Remove the foreign particles and check the
clearances
Check the internal clearances
Replace the bearings
Replace the gaskets
Replace the seal
Replace the oil levels
Clean or replace it
Check piping and remove obstruction
Check piping and remove obstruction
Open it
Reset it
Increase it
Correct it
Check V-belts tension / replace V-belts
Correct it
Correct it
Fix it
Fix it
List of causes
Rif.
4.6
6.6.4
6.6.2
6.6.4
6.6.4
(1)
(1)
6.6.1
6.2
(2)
(2)
(2)
5.5
4.2
6.4
6.3
5.2
6.1
6.4
4.3
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