Ingersoll-Rand Intellisys SSR 10-40, Руководство для обслуживающего персонала

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WARNING!
Several of the following checks must be made with the starter door open which
exposes HIGH and DANGEROUS VOLTAGE conditions. Use great care during
the checking procedures to prevent serious injuries or death.
Power OFF Checks
1. Remove the inlet air filter and the mounting bracket. Manually move the
inlet air valve with your fingers. It should move with a “grainy” feel. Move
it to full open and then to full closed. If it seems loose, moves erratically
or jams in one position, suspect a coupling that is slipping on the motor
shaft.
2. Confirm the two cables from the black Stepper Motor housing are
connected to BTS-3 terminal strip of the Starter Interface Board as
follows:
Small Cable (Stepper Limit Printed Circuit Board)
Terminal Wire Color
1 Ground/Shield
2 Black
3 White
4 Green
5 Red
Large Cable (Stepper Motor)
Terminal Wire Color
6 Brown
7 Blue
8 Green with Yellow
9 Black
3. Carefully inspect the wires described above for excess insulation at the
terminal strip end which could prevent good contact between the wire and
its terminal connection.
4. Check for loose terminals or wires at the transformers and terminal strip
connections of the Starter Interface Board. Also, inspect the plug-in
connector for the Stepper Motor located within the black housing on the
Stepper Motor for full engagement.
5. Check fuse 3FU (39118484) which is rated at 5 AMPs and replace if
required. Do not install a fuse rated greater than 5 AMPS.
If 3FU was found blown, remove wires 1 and 2 from BTS-1 of the Starter
Interface Board and verify an open circuit between terminals 1 and 2 of
the board.
If a short circuit exists between terminals 1 and 2 of the Starter Interface
Board, consider the board to be defective.
When replacing wires 1 and 2 back into the terminal strip, use caution to
prevent any of the wire strands from touching between the two terminals.
6. Check the OHM value of the Stepper Motor windings by removing the four
motor wires from BTS-3 terminals 6, 7, 8 and 9 of the Starter Interface
Board.
There are two sets of Stepper Motor windings.
Wires 6 and 7 are a pair and 5-6 OHMs should be measured between
these two wires on 50-200 horsepower units.
Wires 8 and 9 are the second pair and 5-6 OHMs should also be
measured between these two wires on 50-200 horsepower units.
In addition, measure the OHM value from each of the four wires to the
motor case. “O” OHMs will indicate a ground condition and a defective
Stepper Motor.
7. With the Stepper Motor wires still disconnected from TBS-3 of the Starter
Interface Board, confirm an open circuit between terminals 6 and 7. Also,
confirm an open circuit between terminals 8 and 9.
If a “O” OHMs reading is measured at either of these two locations, a
defective Starter Interface Board is indicated.
Power “ON” Checks
Remove the inlet air filter assembly from the inlet valve prior to closing the main
disconnect switch that supplies power to the compressor.
Observe the inlet air valve while an assistant closes the main disconnect switch.
At the moment the main disconnect switch is closed, the inlet valve moves to the
full open position and then immediately goes to the closed position. This is
followed by Checking Machine and Ready To Start in the display.
This is the normal pattern of inlet valve operation.
Normal valve operation can also be observed by leaving the main disconnect
switch closed and then depressing the Emergency Stop Button.
Then disengage the Emergency Stop Button by rotating slightly clockwise
followed by pressing Reset twice to clear the alarm.
Observe if the valve again moves to the full open position and then to the closed
position in the normal manner.
If the inlet air valve does not move or simply “shakes”, a faulty Stepper Motor,
blown fuses, faulty cable connection at the plug located in the black Stepper
Motor housing, faulty Starter Interface Board and transformers are likely
problem areas.
Various checkpoints are listed below in order of being performed.
1. Using a quality meter, check for 24 volts AC between terminals 1 and 2
on BTS-1 terminal strip of the Starter Interface Board.
If voltage is not available at this point, check wire connections, fuses and
transformer performance.
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