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Greer Company

Crane Systems

GREER COMPANY

1918 E. Glenwood Place, Santa Ana, CA 92705 Tel: (714) 259-9702 Fax: (714) 259-7626

400 Computer Training Manual PN W424900 - 11/07/02

1 of 18

MicroGuard



400 Service Training

Troubleshooting & Maintenance

TEST

100%

VIEW

SET

INFORMATION

DOWN

CLEAR

SELECT

DEDUCT

ERECTED

STOWED

OPERATOR ALARMS

CONTRAST

WORKING

AREA

MAX

MicroGuard 424

5.82

3.46

ATB ALARM

60%

57.2 8

49.1

OUTRIGGERS

360

MAIN BOOM

NO FLY OR JIB

CRANE

SET UP

STOWED

DEDUCT

RCI 414/424 Display

RCI 434 Display

400 Computer Assembly

RCI 500 Display

Содержание MicroGuard 400

Страница 1: ...8 MicroGuard 400 Service Training Troubleshooting Maintenance TEST 100 VIEW SET INFORMATION W DOWN CLEAR UP SELECT DEDUCT ERECTED STOWED OPERATOR ALARMS CONTRAST WORKING AREA W MAX MicroGuard 424 5 82 3 46 ATB ALARM 60 57 2 8 F 49 1 OUTRIGGERS 360 o MAIN BOOM NO FLY OR JIB CRANE SET UP STOWED DEDUCT RCI 414 424 Display RCI 434 Display MG 400 Computer Assembly RCI 500 Display ...

Страница 2: ... Voltage Supplies and Checkpoints 5 Internal Power Supplies 5 Terminal Block Markings 6 Testing Pressure Transducers Through Drive Voltage 7 Pressure Transducer Resistance Measurement 8 Analog Input Terminals AIN 8 Extension Pot Operation 9 Boom Extension Sensor AIN2 10 Boom Angle Sensor AIN3 11 Extension Reel Assembly reeling drum 12 Anti Two Block System Components 13 Where Do Relays Come From 1...

Страница 3: ...he display including the analog and digital functions The interface board routes these voltages to the appropriate locations The larger power supply source with the light is responsible for 5 volt power the smaller power supply produces the 15 volts used in conjunction with several different power applications There are numerous voltage check points on both the processor and the interface boards a...

Страница 4: ...Swing A 08 Personality Rom 064 Swing B Faults in the external sensors are detected without the need of the self test The above faults do not include the entire list of possible Faults and Fault Codes Please see the maintenance manual for a complete listing Interpreting Multiple Faults that Add Up to More than the Numbers Listed Example If the fault is 012 pick the largest fault s from the list tha...

Страница 5: ...onitored at the test points inside the computer adjacent to the fuses and Battery Input Terminals The tolerances for these voltages are listed in the table below as well as in a graphic illustrating the voltage check points To monitor the internal power supplies use a digital voltmeter set to the appropriate VDC setting and attach to the appropriate voltage check points on the terminal board Note ...

Страница 6: ...anual for further definition of terminal blocks Because the drive voltages are all common any analog sensor can be suspect If for example drive voltage is low and 15 V is within tolerance each of the analog sensors must be removed one at a time until the sensor that is causing the voltage to sag is located and replaced If the voltage continues to sag the processor board should be replaced as the d...

Страница 7: ...nsducer and the resistance across the bridge will change causing output to the TX0 TX1 side of the bridge This output indicates to the computer that the weight or center of gravity of the boom is changing The reading is then converted to load To check the input and outputs on this circuit go to the terminal blocks marked DR and DR and TX0 and TX0 The terminal located immediately below the base sid...

Страница 8: ... resistance between pins Each of the open wires red blue green yellow and the case of the transducer There should be no connection between the case and any of the pins Analog Input Terminals AIN Some terminals on terminal strip TB3 will be marked AIN followed by a numeral 0 1 2 etc AIN stands for Analog Input This means that at this terminal there is an incoming signal to the computer from an anal...

Страница 9: ...nt normally 25 V and as the pot is rotated the voltage will linearly increase until at some point it will reach the drive voltage which is 5 25 V 25 V This voltage rise must be steady and consistent without voltage spikes or skips where the voltage drops off Using a voltmeter measure the reading at AIN2 on the computer termination board The schematic below illustrates checkpoints followed by an ex...

Страница 10: ...s out of the range listed above remove the four screws that secure the cover on the extension reel which is located on the left side of the main boom section remove the cover 5 Under the cover on the right side of the extension reel is a terminal strip This terminal strip has six wires connected to the bottom screws With a digital voltmeter set to read DC voltage place the negative lead on the ter...

Страница 11: ...ter 6 With the boom at a 60 angle the voltage should be 3 02 0 1 volts If this is out of range remove the cover from the extension reel located on the left side of the main boom 7 Under the cover on the right side of the extension reel is a terminal strip This terminal strip has six wires connected to the bottom screws 8 With a digital voltmeter set to read DC voltage place the negative lead on th...

Страница 12: ...house the angle sensor enclosure The angle sensor is enclosed inside the housing shown above and has its own cover The pendulum is made of brass and attaches to the shaft of the angle pot and it is dampened with magnets to assure the movement is precise Provides a terminal strip for termination of all wiring for the length angle and ATB sensors Houses a separate bracket to house the length potenti...

Страница 13: ...ock condition the appropriate ATB switch will go to the open position thereby removing the ground from ATBIN and causing ATB Alarm and Function Disconnect The ATB board in the computer controls the ATB alarm and Function Disconnects separately The ATB board located in the computer box Operates the function disconnects by controlling the coil of RL2 ATB relay at DOUT 1 Operates the audible alarm an...

Страница 14: ...power to the relay coils The brown wire which is the ground signal that is returning from the reel to the ATBIN port on the termination board The green signal that is directed by the processor on the upper board If either connection to the relay coils is interrupted it will cause function lockout This circuit is built into the circuit board making it impossible to visually see the color codes insi...

Страница 15: ... the end is never reached The potentiometer is furnished by the manufacturer of the crane and is nearly always mounted inside the collector ring on the bottom of the hydraulic swivel The swing pot is reliable and usually does not cause a problem First explore the wiring diagram of the swing pot to see the source of the drive and analog voltages that run this circuit Note the schematic below TB3 TB...

Страница 16: ...VM to connection 3 black wire and the red lead of the DVM to connection 1 red wire The voltage should be 4 125 0 1 volts If this voltage is out of range the Termination Board may need to be replaced 5 With the black lead on any 0 volt terminal check the voltage at the AIN 5 and AIN 6 terminals The voltage should be 4 50 0 1 maximum and 0 365 0 1 minimum Both of these voltages should rise and fall ...

Страница 17: ...Greer Company Crane Systems GREER COMPANY 1918 E Glenwood Place Santa Ana CA 92705 Tel 714 259 9702 Fax 714 259 7626 MG 400 Computer Training Manual PN W424900 11 07 02 17 of 18 ...

Страница 18: ...Greer Company Crane Systems GREER COMPANY 1918 E Glenwood Place Santa Ana CA 92705 Tel 714 259 9702 Fax 714 259 7626 MG 400 Computer Training Manual PN W424900 11 07 02 18 of 18 ...

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