A digital voltmeter with the capability to also measure current will be required. Regular maintenance and service tools will also be required. This may differ from crane manufacturer and model. Section 2 provides the drawings and reference material that will used in the troubleshooting flowcharts of this manual.
Use the reference drawings in conjunction with the flowcharts to help understand the operation of the system. The display continually changes as the crane moves through the motions needed to make a lift. The DS Modular LMI provides the operator with information regarding the boom length and boom angle of the main boom, working radius rated load and the total calculated weight being lifted by the crane.
Refer to Drawing 4 and Procedure 3, Steps , 13, Replace analog input module. Refer to Drawing 4 and Procedure 3, Steps 1,2,4, 11, Make sure BR3 on the main board is installed. Refer to Procedure 2. Memory module wrongly bridged. Refer to Drawing 4 and Procedure 4. Bridge memory module acc. LMI main board defective.
Memory module wrongly Bridge memory module acc. Incorrect a. Anti Two-block relay is acknowledgment of the stuck or defective. Relay on the main b. Anti Two-Block relay is board. Analogous to E71 for Analogous to E71 for the the relays Wrong rigging condition. Error in the radius The computed radius is too determination small negative deflection Change of the operating code during lifting a load.
DS GM The operating mode switch in the console was used during lifting a load. Check supply voltage. Replace digital output module. Replace main board. Analogous to E71 for the relays Lower the load and set the operating mode switch correctly to the code assigned to the actual operating mode of the crane.
Interruption or accidental ground in the line from console electronics to central unit. Check 24V at terminal X1 of console electronics. Check the connection between console electronics and central unit. If accidental ground occurs, the transmitter module in the console electronics can be damaged. Replace the console electronics or main board respectively.
Error in the data transmission from console to central unit. Refer to also Section 3. Temporary interruption of the data line from console electronics to central unit. No data transmission for central unit to console. CPU defective. Replace console electronics or main board respectively.
If you find an accidental ground, the transmitter module in the console electronics can be damaged. Replace the console electronics.
Refer to Drawing 4 and Procedure 3 Steps , 13, Eliminate interference source by inverse diodes or varistors. Electronics component on the main board defective. CPU or main board of the console defective a. External RAM of the console defective b. Refer to Drawing 4 and Procedure 3 Steps , 13,14 a. Replace console main board b. Replace console main board Refer to Drawing 5. Check the jumper position b. Check analog input module. Replace if necessary. Note: If an error message is displayed which is not contained in above list, please contact the PAT service department.
Crane is not in overload or two-block condition. If console display are blank. The fault is located in power supply, wiring or fuses. Fault in Anti-Two Block system. Check lever lockout system in crane service manual. Go to Section 3. The fault is located in LMI, cables, wiring, fuses, or console. Cut old cable at cable drum. Disconnect damaged length cable from junction box at the boom nose. Refer to Drawing 3.
Open cable reel cover and disconnect wiring from terminal block. Pull 7 conductor cable out of strain relief. Note: Mark wires to make re-connection simpler. Remove cable reel from mounting brackets. Remove damaged length cable, which is mounted to the slip rings in the cable reel, from slip ring terminal.
On the back side of the cable reel, open the strain relief attached to the axle in the center of the drum. Pull existing length cable out of the cable reel.
Pull new length cable through the hole, pipe and strain relief and push it through the axle of the reeling drum. Tighten new strain relief to ensure sealing. Reconnect the length cable to the slip ring.
Remount cable reel to the boom. Turn reeling drum clockwise to spool the new cable neatly onto the drum. Set pre-load on cable reel by turning the drum counter-clockwise 5 to 8 turns. Run the new length cable through the cable guides and wrap the length cable around the boom tip anchor pin 4 or 5 wraps and secure with tie wraps.
Leave enough length cable to connect into the boom tip junction box. Connect the length cable into the boom tip junction box. Reset length potentiometer in length angle transducer screw is located in center of white gear ; with boom fully retracted, turn potentiometer carefully counter-clockwise until it stops.
Recheck length and angle display. Refer to Procedure 5 in Section 5. All crane moments have been stopped. NO Replace fuses. This is an input voltage from the crane. Refer to Drawing 1 in Section 4. NO Check crane power supply for faulty crane electric. This is an output voltage to the console. NO Replace the main board in central unit. Check connections of the cable between console and central unit. Replace cable if necessary. Refer to Drawing 2 in Section 4.
Replace the console. Refer to Drawing 3 in Section 4. Plug appropriate bypass plug into socket of junction box. Remove the bypass plug and measure the resistance at the boom nose box between terminals 1 and 6 with a ohmmeter.
This checks the function of the Anti-Two Block switch. No Check wire connections in boom nose box. Replace Anti-Two-Block switch. No Fault in wiring between boom nose box and cable reel. Check for damaged length cable and wiring. Refer to Drawing 3 Section 4. If broken length cable, Refer to Section 3. Measure the A2B signal in the cable reel between terminal 7 and 8 with an ohmmeter. Measure the A2B signal in the boom base box between terminals 5 and 6 with an ohmmeter.
No Fault in 7 conductor cable between cable reel and boom base box. Check connections and replace cable if necessary. Turn system power off.
Faulty wiring between boom base box and central unit. Check main board function by installing a temporary resistor, Ohms between X and X in central unit.
With resistor connected alarm should be inactive. NO Defect on main board. With boom fully retracted, reset potentiometer by turning it slowly counter-clockwise until it reaches a soft stop. Replace length potentiometer assembly, Refer to Drawing 6 in Section 4.
Remove slip ring body from shaft and remove gear wheel from potentiometer axle. Unscrew mounting plate and remove potentiometer assembly from mounting plate.
Remove assembly wires form terminal block. Connect new assembly to terminal block. Reinstall mounting plate, gear wheel and slip rings. PAT Hirschmann Anti Two Block warning systems are used on cranes to halt or caution the operator of unsafe upward movement of the hook. Refer to system wiring diagram and sensor adjustment procedure. Turn the cable drum 5 to 8 turns counter clockwise. This manual can be viewed on any computer as well as zoomed and printed makes it easy to diagnose and repair problems with your machines electrical system.
Download Or Read Online Of pat ds service manual Ebooks - you can on other cloud hosting like google drive dropbox onedrive or etc. Forward stop and backwards. A Double pole aka. The PAT Load Moment Indicator DS consists of a central microprocessor unit operating console lengthangle sensor pressure transducers and anti-two block switches.
The electrical wiring connecting the various parts of the system. The DS load moment indicator LMI with boom control extension is an operational aid that warns the crane operator when approaching an overload condition a two block condition and an out of boom sequence condition.
Faulty wiring between central unit and length transducer.
0コメント