User Manual

ManualsBrandsRockwell Automation ManualsEquipment1336S, 1336F, 1336E, 1336T, 1336-SN-SP18A Snubber Board Kit

1336-5.39 – August, 1999

InstallationInstructionsIN

Snubber Board Kit

(Catalog Number 1336-SN-SP18A)

Bulletin 1336T, 1336E, 1336S, and 1336F Common Bus

ACDrives

Drive Ratings

R060 – R125, W075 – W125 and

R150 – R250, W150 – W250

Table of Contents Where This Kit is Used. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-3

What This Kit Contains. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-3

How to Use These Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . I-3

Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-3

Electrostatic Discharge Precautions. . . . . . . . . . . . . . . . . . . . . . . I-4

Torque Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-4

Ratings R060 – R125 and W075 – W125 . . . . . . . . . . . . . . . . . . . . I-6

Product Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-6

Drive and Option Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . I-7

1336 FORCE Drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-7

1336 IMPACT Drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-8

1336 PLUS Drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-9

1336 PLUS II Drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-10

Torque Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-11

SCR Module Access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-11

1336 FORCE Drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-12

1336 IMPACT Drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-14

1336 PLUS Drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-16

1336 PLUS II Drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-18

All 1336 FORCE, IMPACT, PLUS, and PLUS II Drives. . . . . . I-20

Snubber Board Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-22

SCR Module Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-24

SCR Module Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-26

Ratings R150 – R250 and W150 – W250 . . . . . . . . . . . . . . . . . . . I-28

Product Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-28

Drive and Option Identification. . . . . . . . . . . . . . . . . . . . . . . . . . I-29

1336 FORCE Drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-29

1336 IMPACT Drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-30

1336 PLUS Drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-31

1336 PLUS II Drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-32

Summary of content (58 pages)

PAGE 1
Installation Instructions IN Snubber Board Kit (Catalog Number 1336-SN-SP18A) Bulletin 1336T, 1336E, 1336S, and 1336F Common Bus AC Drives Drive Ratings R060 – R125, W075 – W125 and R150 – R250, W150 – W250 Table of Contents Where This Kit is Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-3 What This Kit Contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-3 How to Use These Instructions . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 2
I-2 Torque Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-33 SCR Module Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1336 FORCE Drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1336 IMPACT Drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1336 PLUS Drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1336 PLUS II Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 3
I-3 Where This Kit is Used You can use this kit to install a snubber board on the SCR module in your drive. What This Kit Contains This kit contains a snubber board assembly and these instructions. SCR module testing and replacement information is included in these instructions. How to Use These Instructions To install a snubber board on your drive: 1. Determine the rating of the drive, refer to “Ratings R060 – R125 and W075 – W125” on page I-6 or “Ratings R150 – R250 and W150 – W250” on page I-28. 2.
PAGE 4
I-4 Electrostatic Discharge Precautions ! ATTENTION: This assembly contains parts and subassemblies that are sensitive to electrostatic discharge. Static control precautions are required when servicing this assembly. Component damage may result if you ignore electrostatic discharge control procedures. If you are not familiar with static control procedures, reference Allen-Bradley Publication 8000-4.5.2, Guarding Against Electrostatic Damage, or any other applicable ESD protection handbook.
PAGE 5
I-5 Figure I-1 Two-Point Mounting 1 2 Two-Point Mounting 1 2 Temporary Tighten 2 1 AB0906 Final Tighten Figure I-2 Four-Point Mounting 1 3 4 2 Four-Point Mounting 1 2 3 4 2 1 Temporary Tighten 4 3 AB0903 Final Tighten Figure I-3 Six-Point Mounting 4 5 6 2 5 3 6 1 4 Temporary Tighten to 0.5 N-m (4 lb-in.) 3 2 1 2 5 3 6 1 4 Final Tighten to 3 N-m (26 lb-in.) Six-Point Mounting AB0902 Important: Do not exceed 0.5 Newton-meters (4 lb-in.
PAGE 6
I-6 Ratings R060 – R125 and W075 – W125 Product Identification Drive Nameplate Location The drive nameplate is located on the face of the Control Board/ Adapter Mounting Plate. The drive nameplate contains the drive’s catalog number and other important drive information. Reference the catalog number to determine the rating of your drive, when calling for technical assistance, and when ordering replacement parts.
PAGE 7
I-7 Drive and Option Identification 1336 FORCE Drives The following is an explanation of the catalog numbering system for 1336 FORCE Common Bus AC Drives and options. The catalog number is coded to identify the drive power rating and can be found on the drive shipping carton and nameplate. Catalog Number Explanation 1336T – Use Number for Specific Constant Torque Drive – GT2EN – L6 BULLETIN NO.
PAGE 8
I-8 1336 IMPACT Drives The following is an explanation of the catalog numbering system for 1336 IMPACT Common Bus AC Drives and options. The catalog number is coded to identify the drive power rating and can be found on the drive shipping carton and nameplate Catalog Number Explanation 1336E – Use Number for Specific Constant Torque Drive – EN – L6 – HA1 – GM1 BULLETIN NO.
PAGE 9
I-9 1336 PLUS Drives The following is an explanation of the catalog numbering system for 1336 PLUS Common Bus AC Drives and options. The catalog number is coded to identify the drive power rating and can be found on the drive shipping carton and nameplate. Catalog Number Explanation 1336S – Use Number for Specific Constant Torque Drive BULLETIN NO. RATINGENCLOSURE (MUST BE SPECIFIED) – BM – GM1 – HA1C ...
PAGE 10
I-10 1336 PLUS II Drives The following is an explanation of the catalog numbering system for 1336 PLUS II Common Bus AC Drives and options. The catalog number is coded to identify the drive power rating and can be found on the drive shipping carton and nameplate. Catalog Number Explanation 1336F – Use Number for Specific Constant Torque Drive – EN – LA6 – HAS1 – GMS1 BULLETIN NO.
PAGE 11
I-11 Torque Specifications Component The following table lists fastener locations by component, application, and torque specifications. Refer to “Torque Sequence” on page I-4 for fastening two-point, four-point, and six-point components to the heat sink. Fastener Application Fastener Used Torque in.-lb Torque N-m SCR Module Module to Heat Sink M6 x 16 mm Screw 52 5.9 Snubber Board Board to SCR M4 x 8 mm Screw 12 – 16 1.4 – 1.
PAGE 12
I-12 1336 FORCE Drives Remove the Control Board/Adapter Mounting Plate Figure I-5 Control Board/Adapter Mounting Plate. Control Board Mounting Plate Main Control Board HIM (Standard Adapter Board only) Standard Adapter Board TB6 TB5 PLC Comm Adapter Board 1336-5.
PAGE 13
I-13 1. Remove power from the drive. 2. Open the Enclosure door. Drive shown with door open, sides removed. 3. Check for zero volts at TB1 terminals +DC and -DC. 4. Check for the absence of control voltage at: – TB20 and TB21 on drives using a PLC Comm Adapter Board – TB5, TB6, and TB7 on drives using a Standard Adapter Board 5. Remove the wires and connectors from the Standard or PLC Comm Adapter Board. 6. Remove the nuts at the top of the Control Board/Adapter Mounting Plate. 7.
PAGE 14
I-14 1336 IMPACT Drives Remove the Main Control Board Mounting Plate Figure I-6 Main Control Board Mounting Plate Main Control Board Mounting Plate Connector J1 Main Control Board Connector J5 Connector J7 TB11 Mounting Plate Screw TB10 Terminal Block TE AB0947 1336-5.
PAGE 15
I-15 1. Remove power from the drive. 2. Open the Enclosure door. Drive shown with door open, sides removed. 3. Check for zero volts at TB1 terminals +DC and -DC. 4. Check for the absence of control voltage at: – TB10 – TB11 – L-Option Board (if used) 5. Remove the ground wire from the Enclosure door. 6.
PAGE 16
I-16 1336 PLUS Drives Remove the Main Control Board Mounting Plate Figure I-7 Main Control Board Mounting Plate Main Control Board Mounting Plate Connector J1 Connector J2 Connector J6 Connector J8 Terminal Block TE Terminal Block TB3 Ground Wire Stake-on Connector J10 Terminal Block TB2 AB0946 1336-5.
PAGE 17
I-17 1. Remove power from the drive. 2. Open the Enclosure door. Drive shown with door open, sides removed. 3. Check for zero volts at TB1 terminals +DC and -DC. 4. Check for the absence of control voltage at: – TB2 – TB3 5. Disconnect the following from the Main Control Board: – J2 ribbon cable connector – J1 connector – Ground wire at terminal block TE – J10 ground wire at the stake-on connector – J6 connector – J8 connector – All wires from the terminals on TB2 and TB3 6.
PAGE 18
I-18 1336 PLUS II Drives Remove the Main Control Board Mounting Plate Figure I-8 Main Control Board Mounting Plate Main Control Board Mounting Plate Connector J2 Connector J5 Comm Connector Terminal Block TE Ground Wire Stake-on Connector J10 Comm Connector Plug 1336-5.
PAGE 19
I-19 1. Remove power from the drive. 2. Open the Enclosure door. Drive shown with door open, sides removed. 3. Check for zero volts at TB1 terminals +DC and -DC. 4. Check for the absence of control voltage. 5. Disconnect the following from the Main Control Board: – J2 ribbon cable connector – J10 ground wire at the stake-on connector – J5 connector – Comm connector – All wires from the terminals on TB2 and TE 6. Remove the nuts at the top of the Main Control Board Mounting Plate. 7.
PAGE 20
I-20 All 1336 FORCE, IMPACT, PLUS, and PLUS II Drives Remove the Gate Driver Board and Precharge Board Mounting Plates Figure I-9 Gate Driver Board and Precharge Board Mounting Plates Mounting Plate and Gate Driver Board J2 J13 J1 J2 J7 J6 J3 J8 TB7 Mounting Plate and Precharge Board TB6 Precharge Guard J10 AB0900 1336-5.
PAGE 21
I-21 1. Remove Gate Driver Board connections: – TB7 ground wire – J2 Ground Sense CT connector – J13 connector – J7 Power Module connector – J8 Power Module connector – J10 Bus Capacitor Bank connector – J6 connector – TB6 Fan connector, if applicable – J9 Precharge Board connector ! ATTENTION: When removing the entire wire harness connecting Gate Driver Board connector J9 to Precharge Board connector J3, align the wires on the harness terminals with the pins on the board connectors.
PAGE 22
I-22 Snubber Board Installation Figure I-10 Snubber Board Installation SCR Bus Bar Preform Snubber Board AB0912 1336-5.
PAGE 23
I-23 1. Access the SCR Module. Refer to “SCR Module Access” on page I-11. 2. Remove the three nuts and wires from the SCR Module. 3. Position the bus bar over the SCR Module as shown in Figure I-10. 4. Replace the bolts and wires to fasten the bus bar to the SCR Module. 5. Remove the black screw covers from the Bus Bar. 6. Place the preform between the Snubber Board and the Bus Bar and attach the Snubber Board to the Bus Bar with the nuts provided. 7.
PAGE 24
I-24 SCR Module Test Important: There are two styles of connectors for the SCR Module. Both styles are shown in Figure I-11. Figure I-11 SCR Module Test G SCR A K Spade Lugs 3 2, K 1 SCR B K Spade Lugs G 3 2, K 1 1 2 3 SCR AB0897B K 1336-5.
PAGE 25
I-25 1. Access the SCR Module. Refer to “SCR Module Access” on page I-11. 2. Set your meter to test diodes. 3. The following table shows meter connections and ideal meter readings for those connections. Refer to Figure I-11 for meter connection locations. Nominal Meter Reading Meter (+) Lead Meter (-) Lead Volts Ohms 1 3 1 – 3 MΩ open 3 1 0.3 – 0.4V 0 – 200KΩ 1 2 open 0.2 – 0.6 MΩ 2 1 open 0.2 – 0.6 MΩ 2 G 0.005 5 – 20 Ω G 2 0.005 5 – 20 Ω Diode SCR 4.
PAGE 26
I-26 SCR Module Replacement Figure I-12 SCR Module Preform SCR AB0915 1336-5.
PAGE 27
I-27 1. Access the SCR Module. Refer to “SCR Module Access” on page I-11. 2. Remove all cable connections from the SCR Module. 3. Remove the screws fastening the SCR Module to the drive. 4. Clean all surfaces between the SCR Module and the heat sink using a soft, clean cloth. 5. Replace the Preform between the SCR Module and the heat sink. 6. Install the SCR Module in reverse order of removal. Refer to “Torque Sequence” on page I-4. Refer to “Torque Specifications” on page I-11 for final tightening.
PAGE 28
I-28 Ratings R150 – R250 and W150 – W250 Product Identification Drive Nameplate Location The drive nameplate is located on the face of the Control Board/ Adapter Mounting Plate. The drive nameplate contains the drive’s catalog number and other important drive information. Reference the catalog number to determine the rating of your drive, when calling for technical assistance, and when ordering replacement parts.
PAGE 29
I-29 Drive and Option Identification 1336 FORCE Drives The following is an explanation of the catalog numbering system for 1336 FORCE Common Bus AC Drives and options. The catalog number is coded to identify the drive power rating and can be found on the drive shipping carton and nameplate. Catalog Number Explanation 1336T – Use Number for Specific Constant or Variable Torque Drive – GT2EN – L6 BULLETIN NO.
PAGE 30
I-30 1336 IMPACT Drives The following is an explanation of the catalog numbering system for 1336 IMPACT Common Bus AC Drives and options. The catalog number is coded to identify the drive power rating and can be found on the drive shipping carton and nameplate. Catalog Number Explanation 1336E – Use Number for Specific Constant or Variable Torque Drive – EN – L6 – HA1 – GM1 BULLETIN NO.
PAGE 31
I-31 1336 PLUS Drives The following is an explanation of the catalog numbering system for 1336 PLUS Common Bus AC Drives and options. The catalog number is coded to identify the drive power rating and can be found on the drive shipping carton and nameplate. Catalog Number Explanation 1336S – Use Number for Specific Constant or Variable Torque Drive BULLETIN NO. RATING-ENCLOSURE (MUST BE SPECIFIED) – BM – GM1 – HA1C ... OPTIONS AS REQUIRED .
PAGE 32
I-32 1336 PLUS II Drives The following is an explanation of the catalog numbering system for 1336 PLUS II Common Bus AC Drives and options. The catalog number is coded to identify the drive power rating and can be found on the drive shipping carton and nameplate. Catalog Number Explanation 1336F – Use Number for Specific Constant or Variable Torque Drive – EN – LA6 – HAS1 – GMS1 BULLETIN NO.
PAGE 33
I-33 Torque Specifications The following table lists fastener locations by component, application, and torque specifications. Refer to “Torque Sequence” on page I-4 for fastening two-point, four-point, and six-point components to the heat sink. Component Fastener Application Torque lb-in.
PAGE 34
I-34 1336 FORCE Drives Remove the High Voltage Guard Figure I-14 High Voltage Guard High Voltage Guard AB0907 1336-5.
PAGE 35
I-35 1. Remove power from the drive. 2. Open the Enclosure door. Drive shown with door open, sides removed. 3. Check for zero volts at TB1 terminals +DC and -DC. 4. Check for the absence of control voltage at: – TB20 and TB21 on drives using a PLC Comm Adapter Board – TB5, TB6, and TB7 on drives using a Standard Adapter Board 5. Remove the screws fastening the High Voltage Guard to the standoffs. 6. Lift the guard upward to disengage the tabs on the right side from the bus bar supports. 7.
PAGE 36
I-36 Remove the Control Board/Adapter Mounting Plate Figure I-15 Control Board/Adapter Mounting Plate J1 PLC Comm Adapter Board J5 J7 Mounting Plate TB21 Main Control Board TB10 TB20 HIM (Standard Adapter Board only) J7 J1 TB7 Standard Adapter Board TB6 TB5 AB0908 1336-5.
PAGE 37
I-37 1. Remove the wires and connectors from the Standard or PLC Comm Adapter Board. 2. Remove the wires and connectors from the Main Control Board. 3. Slide the LEM harness out of the clip located at the top-left of the Control Board/Adapter Mounting Plate. 4. Remove the two screws fastening the bottom of the Control Board/Adapter Mounting Plate to the standoffs. 5. Remove the nuts fastening the top of the Control Board/Adapter Mounting Plate to the Gate Driver Board Mounting Plate. 6.
PAGE 38
I-38 1336 IMPACT Drives Remove the High Voltage Guard Figure I-16 High Voltage Guard High Voltage Guard AB0951 1336-5.
PAGE 39
I-39 1. Remove power from the drive. 2. Open the Enclosure door. Drive shown with door open, sides removed. 3. Check for zero volts at TB1 terminals +DC and -DC. 4. Check for the absence of control voltage at: – TB10 – TB11 – L-Option Board (if used) 5. Remove the screws fastening the High Voltage Guard to the standoffs. 6. Lift the guard upward to disengage the tabs on the right side from the bus bar supports. 7. Pull the guard away from the drive. 1336-5.
PAGE 40
I-40 Remove the Main Control Board Mounting Plate Figure I-17 Main Control Board Mounting Plate Main Control Board Mounting Plate Slide-Mount Stand-Off Connector J5 Connector J1 Connector J7 Mounting Screw Terminal Block TE 1336-5.
PAGE 41
I-41 1. Disconnect the following from the Main Control Board: – J1 connector – J5 ribbon cable connector – J7 connector – Ground wires from terminal block TE – Chassis ground wire at the top-right corner of the Main Control Board Mounting Plate 2. Slide the LEM harness out of the clip located at the top-left of the Main Control Board Mounting Plate. 3. Remove the two screws fastening the bottom of the Main Control Board Mounting Plate to the standoffs. 4.
PAGE 42
I-42 1336 PLUS Drives Remove the High Voltage Guard Figure I-18 High Voltage Guard High Voltage Guard AB0950 1336-5.
PAGE 43
I-43 1. Remove power from the drive. 2. Open the Enclosure door. Drive shown with door open, sides removed. 3. Check for zero volts at TB1 terminals +DC and -DC. 4. Check for the absence of control voltage. 5. Remove the screws fastening the High Voltage Guard to the standoffs. 6. Lift the guard upward to disengage the tabs on the right side from the bus bar supports. 7. Pull the guard away from the drive. 1336-5.
PAGE 44
I-44 Remove the Main Control Board Mounting Plate Figure I-19 Main Control Board Mounting Plate Ground Stud Mounting Plate Main Control Board Connector J1 Connector J6 8-Pin HIM Connector Connector J8 Terminal Block TB2 Connector J2 Terminal Block TB3 Terminal Block TE AB0948 1336-5.
PAGE 45
I-45 1. Disconnect the following from the Main Control Board: – J1 connector – J2 ribbon cable connector – J8 connector – 8-pin connector from the HIM Mounting Plate on the Main Control Board – Ground wires from terminal block TE – Chassis ground wire at the top-right corner of the Main Control Board Mounting Plate 2. Slide the LEM harness out of the clip located at the top-left of the Main Control Board Mounting Plate. 3.
PAGE 46
I-46 1336 PLUS II Drives Remove the High Voltage Guard Figure I-20 High Voltage Guard High Voltage Guard AB0966 1336-5.
PAGE 47
I-47 1. Remove power from the drive. 2. Open the Enclosure door. Drive shown with door open, sides removed. 3. Check for zero volts at TB1 terminals +DC and -DC. 4. Check for the absence of control voltage. 5. Remove the screws fastening the High Voltage Guard to the standoffs. 6. Lift the guard upward to disengage the tabs on the right side from the bus bar supports. 7. Pull the guard away from the drive. 1336-5.
PAGE 48
I-48 Remove the Main Control Board Mounting Plate Figure I-21 Main Control Board Mounting Plate Main Control Board Mounting Plate Connector J5 Comm Connector Terminal Block TB2 Connector J2 Terminal Block TE Comm Connector Plug 1336-5.
PAGE 49
I-49 1. Disconnect the following from the Main Control Board: – J2 ribbon cable connector – Comm connector – J10 ground wire at the stake on connector – J5 connector – All wires from the terminals on TB2 and TE 2. Slide the LEM harness out of the clip located at the top-left of the Main Control Board Mounting Plate. 3. Remove the two screws fastening the bottom of the Main Control Board Mounting Plate to the standoffs. 4.
PAGE 50
I-50 All 1336 FORCE, IMPACT, PLUS, and PLUS II Drives Remove the Gate Driver Board and Precharge Board Mounting Plates Figure I-22 Gate Driver Board and Precharge Board Mounting Plates Ground Stud Mounting Plate Mounting Plate J2 J13 J3 J7 J8 J8 J2 Ground Stud J6 J9 J10 AB0909 1336-5.
PAGE 51
I-51 1. Remove Gate Driver Board connections: – J2 connector – J6 connector – J7 connector – J8 connector – J9 connector – J10 connector – TB6 High Voltage Aux. Input (if equipped) – Ground wire from the top of the Gate Driver Board Mounting Plate – J13 connector ! ATTENTION: When removing the entire wire harness connecting Gate Driver Board connector J9 to Precharge Board connector J3, align the wires on the harness terminals with the pins on the board connectors.
PAGE 52
I-52 Snubber Board Installation Figure I-23 Snubber Board Installation Snubber Board SCR Bus Bar Preform AB0911 1336-5.
PAGE 53
I-53 1. Access the SCR Module. Refer to “SCR Module Access” on page I-33. 2. Remove the three nuts and wires from the SCR Module. 3. Position the bus bar over the SCR Module as shown in Figure I-23. 4. Replace the bolts and wires to fasten the bus bar to the SCR Module. 5. Remove the black screw covers from the Bus Bar. 6. Place the preform between the Snubber Board and the Bus Bar and attach the Snubber Board to the Bus Bar with the nuts provided. 7.
PAGE 54
I-54 SCR Module Test Important: There are two styles of connectors for the SCR Module. Both styles are shown in Figure I-24. Figure I-24 SCR Module Test G SCR A K Spade Lugs 3 2, K 1 SCR B K Spade Lugs G 3 2, K 1 AB0898 1 2 3 SCR K 1336-5.
PAGE 55
I-55 1. Access the SCR Module. Refer to “SCR Module Access” on page I-33. 2. Set your meter to test diodes. 3. The following table shows meter connections and ideal meter readings for those connections. Refer to Figure I-24 for meter connection locations. Nominal Meter Reading Meter (+) Lead Meter (-) Lead Volts Ohms 1 3 1 – 3 MΩ open 3 1 0.3 – 0.4V 0 – 200KΩ 1 2 open 0.2 – 0.6 MΩ 2 1 open 0.2 – 0.6 MΩ 2 G 0.005 5 – 20 Ω G 2 0.005 5 – 20 Ω Diode SCR 4.
PAGE 56
I-56 SCR Module Replacement Figure I-25 SCR Module Preform SCR AB0910 1336-5.
PAGE 57
I-57 1. Access the SCR Module. Refer to “SCR Module Access” on page I-33. 2. Remove the screws fastening the Positive and Negative Converter Bars to the DC Bus Inductor. 3. Remove the TB1 Input Bus Bars and the Precharge Board Wiring Harnesses from the SCR Module. 4. Remove the screws fastening the SCR Module to the heat sink. 5. Clean all surfaces between the SCR Module and the heat sink using a soft, clean cloth. 6. Replace the Preform between the SCR Module and the heat sink. 7.