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Rotar Plus 20-25 Easytronic - Cod.197AA2702 -  Edition 00 01/2004

13

GB

Problem

Motor stop due to thermal relay

tripping

High oil consumption

Oil leakage from suction filter

Safety valve open

Compressor temperature thermo-

stat tripped

Low compressor efficiency

The compressor is running but

does not compress air

The compressor compresses air

beyond set max. pressure

Compressor does not restart

Difficult start

Oil inside cabinet

TROUBLESHOOTING

Cause

Voltage too low

Overtemperature

Defective drainage

Oil level too high

Oil separator filter broken

Oil separator filter seals leaking

Suction regulator does not close

Pressure too high

Suction regulator does not close

at the end of the cycleI

Oil separator filter clogged

Room temperature too high

Radiator clogged

Oil level too low

Thermostat faulty

Belt is slack

Air filter dirty or clogged

Regulator is closed and does not

open because it is dirty

Regulator is closed and does not

open because it receives no com-

mand signal

Regulator is open and does not

close because it is dirty

Regulator is open and does not

close because it receives no

command signal

Oil separator filter clogged

Min. pressure valve does not clo-

se perfectly

Voltage too low

Shop too cold

Leakage from tubes

Leakage from front compressor

flange

Remedy

Check voltage, press Reset and start once again

Check motor absorption and check relay settings. If absorption is

OK, press Reset and start once again

Check oil drainage tube and non-return valve

Check oil level and drain some, if necessary

Change oil separator filter

Replace gaskets

Check regulator and solenoid valve

Check setting of pressure switch

Check regulator and solenoid valve

Change oil separator filter

Improve ventilation

Clean the radiator with solvent

Top up with oil

Replace thermostat, press Reset and start once again

Stretch the belt, press Reset and start once again

Clean or replace filter

Remove the suction filter and check if regulator can be manually

opened. Remove and clean, if necessary.

Ensure that signal between pressure switch and solenoid valve is

available. Replace part, if damaged.

Remove the regulator and clean

Ensure that signal between pressure switch and solenoid valve is

available. Replace part, if damaged.

Change oil separator filter

Remove and clean the valve. Replace the seal, if necessary

Check mains voltage

Heat up shop

Tighten fittings and/or replace damaged tubes

Remove and replace seal ring.

Содержание ROTAR PLUS 20

Страница 1: ...facturers f Products can be delivered to the Manufacturer for servicing purposes only after prior authorization by the very Manufacturer The Manufacturer shall decide at their discretion whether authorization can be granted or require an Authorized Service Center to take on servicing In any case products shall be delivered free of any charge and will be returned to the Customer on ex factory basis...

Страница 2: ...and maintenance carried out so far SYMBOLS USED IN THE MANUAL Some symbols are used to highlight danger situations give recommendations or information These symbols are usually positioned next to the text a figure or at the top of a page in this case they refer to all subjects dealt with in that page Carefully read symbol meaning below CAUTION Important description on service dangerous situation s...

Страница 3: ...the maintenance schedule specified in the user s guide WHAT NOT TO DO Do not touch inner parts and pipes as they are very hot during compressor operation and stay hot for a certain time after compressor stop Do not position inflammable or nylon objects or cloths close to and onto the compressor Do not move the compressor when the tank is under pressure Do not operate the compressor if the power ca...

Страница 4: ...llection centres for disposal PLACEMENT AND INSTALLATION fig 2 Upon installation make sure that the chosen place is in compliance with all prevailing national safety standards and meets the following requirements low percentage of dust suspended in air shop must be suitably sized and well ventilated so that room tem perature never exceeds 40 C when the compressor is working If this is not the case...

Страница 5: ...24 50 60 Electrical box protection class IP 54 54 54 54 54 54 Motor insulation class F F F F F F Full load current A 31 31 31 36 36 36 Starting load A 70 75 73 98 104 107 Max Start up per hour n 10 10 10 10 10 10 Ambient limit temperature C 50 50 50 50 50 50 Noise level at 1 m Cagi pneurop dB A 70 70 70 71 71 70 3URWHFWLRQ GHYLFHV Max compressor temperature C 110 110 110 110 110 110 Min oil temper...

Страница 6: ...led loadless cycle starts blinking LOADLESS message is displayed once loadless cycle is over compressor stops and off message is displayed 8 Emergency stop switch to stop compressor only in case of actual need 9 Functioning diagram maintenance operations WORKING TIMES Automatic mode The compressor operation is controlled by the pressure transducer which stops the machine when the max pressure valu...

Страница 7: ...ission using RS485 and automatically disable transmission on RS232 12 Pressure sensor service password enables the 4 20 mA input to which the pressure sensor is connected With this parameter activated the pressure measurement is displayed To display machine operation time press the key the display will revert to the pressure measurement automatically after 20 seconds Enabling this parameter the ex...

Страница 8: ...t be silenced by the service technician who when carrying out maintenance operations will select the item Pre alarm hours from the menu and reset the value as described under the heading Modifiable parameters point 1 9 Separator pressure switch Alarm trips in the event of the separator pressure switch contact opening The compressor locks up To silence the alarm first reset the separator pressure s...

Страница 9: ...l mixture which ensures the seal and the lubrication of the moving parts of the compressor The air oil mixture returns to the tank 6 where the air is pre separated through spinning and is finally separated from the oil by the oil separator filter 13 From the tank 6 only air comes out which reaches the radiator 11 through the tube 15 and the mains through the cut off cock 16 FIRST START UP Before s...

Страница 10: ...ey would let dust into the compression unit Replace the air filter when you have cleaned it four times Clean the radiators The radiator is highly efficient with a limited clogging degree However in case of abnormal overheating or at least once a year a check for filter clogging is recommended To clean the radiators proceed as follows remove the rear and upper panels of the pressurized chamber posi...

Страница 11: ...ion rules in force EVERY 2000 OPERATING HOURS Check drive belt tension Fig 12 Use a frequency tester to carry out this check Proceed as follows Move tester microphone closer to the belt about at mid length and hit the belt with a wrench Read value on tester Stretch or slacken the belt if the value is different from values indicated in the table Higher value slacken Lower value stretch To adjust pr...

Страница 12: ... Change the drive belt as follows fig 12 2 Tighten the screw 1 turning it clockwise with a hexagon head wrench until you feel that the belt is slackening and comes off easily 3 Install the new belt and set the screw 1 back to its original position turn clockwise Leave belt slightly slack Check frequency value as described on page 11 1 Test 12 ...

Страница 13: ...ignal Oil separator filter clogged Min pressure valve does not clo se perfectly Voltage too low Shop too cold Leakage from tubes Leakage from front compressor flange Remedy Check voltage press Reset and start once again Check motor absorption and check relay settings If absorption is OK press Reset and start once again Check oil drainage tube and non return valve Check oil level and drain some if ...

Страница 14: ... 500 mA 500V KM1 Line contactor 18 5 kW 11 kW 18 5 kW 11 kW KM2 Delta contactor 18 5 kW 11 kW 18 5 kW 11 kW KM3 Star contactor 15 kW 7 5 kW 15 kW 7 5 kW FR Thermal relay 28 40 17 22 28 40 20 25 YV Solenoid valve SP1 Minimum pressure switch SP2 Pressure switch for oil separator filter SP3 Pressure switch for air filter BP Pressure transducer 0 16 bar D Electronic controller ST Thermal feeler for el...

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