Robuschi Robox Evolution RB-DV - Troubleshooting Guide; Common Operating Problems and Causes; Detailed Troubleshooting Solutions

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