Generator Set May Not Shut Down as Intended – 2020-2022 Cummins Power Generation

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Technical Service Bulletin Technical Service Bulletin: TSB220176 Released Date: 21-Mar-2023 Safety Campaign #4935 C500D6RE Door Switch Logic Corrective Action Safety Campaign #4935 C500D6RE Door Switch Logic Corrective Action Warranty Statement Contents The information in this document authorizes specific changes to the repair practice for failures covered under product warranty coverages. Product Affected • C500D6RE Issue Symptom • Some C500D6RE rental generator sets have incorrect door switch logic, disabling the generator set’s shut down command to paralleled generator sets when the busbar door is opened during paralleled operation of the generator set, potentially exposing the operator to energized electrical components. Root Cause • Incorrect busbar door switch wiring. Verification/Confirmation Locate the generator set serial number (GSN) on the nameplate inside the enclosure. If the GSN is listed in Table 1 below, please proceed to the Resolution section below. Table 1, Affected Generator Set Serial Numbers Safety Campaign #4935 C500D6RE Door Switch Logic Corrective Action Page 1 of 13 https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2022/tsb220176.html 3/23/2023 J20082 4749 B21088 7146 D21091 4621 D21092 1355 E21092 6148 G21095 7304 G21096 0172 L21002 2105 J20082 4971 C21088 9838 C21090 4156 D21092 2978 E21093 4358 G21095 7378 G21096 0182 L21002 2493 J20083 6024 B21088 9498 C21090 2696 D21092 2951 E21093 4340 G21095 7359 K21000 4336 A22002 9583 J20083 3648 C21089 1512 C21090 2684 D21091 9496 F21093 6186 G21095 7804 G21096 0167 A22003 2655 L20085 6302 C21089 1525 D21091 4622 D21091 9516 F21093 6185 G21095 7786 K21000 4449 A22003 1047 A21086 6484 C21089 4116 D21091 4968 D21092 2958 F21093 9891 G21095 7633 K21000 7466 A22003 2186 A21087 0070 C21089 4070 D21091 4666 D21091 9359 F21094 0630 G21095 8699 L21001 6224 A22003 2178 B21088 4144 C21089 4167 D21091 9376 D21092 2953 F21094 0631 G21095 8700 L21001 7303 A22003 4303 B21088 3218 C21089 4099 D21091 9246 D21092 2959 F21093 9245 G21095 8701 L21001 8316 B22003 9074 B21088 4042 C21089 9036 D21091 9456 D21092 2954 F21093 9977 G21095 8702 L21002 1129 A22003 3251 B21088 2731 C21089 8236 D21091 4623 F21093 6037 F21094 0629 G21095 8712 L21002 2193 B22003 9075 B21088 3036 C21089 9994 D21091 9457 D21092 2955 F21094 4937 G21096 0166 L21002 2194 C22005 2086 B21088 3016 C21090 2444 D21091 9357 D21092 3008 F21094 1624 G21096 0168 L21002 2443 B22003 9265 B21088 5516 C21089 9996 D21091 9358 F21093 6106 F21095 1663 G21096 0169 L21002 2195 C22005 2008 B21088 5518 C21089 9034 E21092 9300 D21092 4657 F21095 1664 G21096 0170 L21002 2492 C22005 2083 B21088 7145 D21091 4393 D21092 2950 E21092 4648 G21095 7358 G21096 0171 L21002 2444 A22003 0813 Safety Campaign #4935 C500D6RE Door Switch Logic Corrective Action Page 2 of 13 https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2022/tsb220176.html 3/23/2023 Resolution To correct the door switch logic, changes to the door switch wiring is required using retrofit kit (Girtz Part Number KTS20-0015-A01). To order, contact Girtz Industries Inc. via email at sales@girtz.com with your container serial number (located behind rear access doors), generator set serial number, shipping contact and shipping address. Figure 1, Container Serial Number Location To install the retrofit kit, see the Service Instructions section below. Service Instructions Warning! Make sure the equipment is in an electrically safe work condition and Lock-out Tag-out procedure has been followed prior to performing any work. 1. Disconnect the negative battery cable. 2. Remove the protective cover to access the control panel wiring. Safety Campaign #4935 C500D6RE Door Switch Logic Corrective Action Page 3 of 13 https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2022/tsb220176.html 3/23/2023 3. Using the Din rail included in the kit as a template, drill 4, ¼” holes and mount 4” din rail to the divider panel inside the control box behind the roadside rear access panel. (Mounting hardware not included) Figure 2, Control Box 4. Place end stop, 3 pole relay (K23), 1 pole relay (R16) onto the Din rail. (See Figure 3) Safety Campaign #4935 C500D6RE Door Switch Logic Corrective Action Page 4 of 13 https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2022/tsb220176.html 3/23/2023 Figure 3, Mounting of DIN Rail and Relays Removing of existing wires Safety Campaign #4935 C500D6RE Door Switch Logic Corrective Action Page 5 of 13 https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2022/tsb220176.html 3/23/2023 Figure 4, Cummins Control Panel Wiring Diagram 5. Inside of the power command controller box remove wire W‐386 from K16‐13 and move it to K23‐10 (See Figure 5). Safety Campaign #4935 C500D6RE Door Switch Logic Corrective Action Page 6 of 13 https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2022/tsb220176.html 3/23/2023 Figure 5, Original Power Command Controller Pin Out 6. Remove Wire “C” (Brown) from CTB27‐4 and move it to K23‐13. Wire should now connect the paralleling connector to K23-13 (See Figure 6 and Figure 7). 7. Remove wire “D” (white) from CTB22‐4 and move it to CTB12‐4. Wire should now connect the paralleling connector to CTB12-4 (See Figure 6 and Figure 7). Safety Campaign #4935 C500D6RE Door Switch Logic Corrective Action Page 7 of 13 https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2022/tsb220176.html 3/23/2023 Figure 6, Original Power Command Controller Pin Out Safety Campaign #4935 C500D6RE Door Switch Logic Corrective Action Page 8 of 13 https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2022/tsb220176.html 3/23/2023 Figure 7, Updated Power Command Controller Pin Out 8. At the rear customer connection panel, remove the customer connection cover panel and remove wire “C” (Brown) from TB‐Z3 and move it to TB‐Z14 (See Figure 8). 9. Remove wire “D” (white) from TB‐Z4 and move it to TB‐Z15 (see Figure 8). 10. On the busbar door switch, remove the wire from pin 2 (normally closed) and move it to pin 3 (normally open) (see Figure 8). Safety Campaign #4935 C500D6RE Door Switch Logic Corrective Action Page 9 of 13 https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2022/tsb220176.html 3/23/2023 Figure 8, Original Rear Panel Pin Out Installing additional wires Note: 20’ of wire is supplied in the kit, installer is responsible for cutting wire to correct length and labeling wires. 11. Wire from K23‐2 to K16‐13 (See wire 150 in Figure 4 and Figure 5). 12. Wire from R16‐13 to TB‐Z4 (See wire 151 in Figure 4 and Figure 9). Note: Roadside rear louver will need to be removed to gain access. *Warning*: Louvers are over 50lbs, use proper lifting tools or additional person 13. Wire from CTB5‐4 to TB‐Z3 (See wire 152 in Figure 9). Note: Roadside rear louver will need to be removed to gain access. 14. Wire from CTB6‐4 to R16‐9 (See wire 153 in Figure 9). 15. Wire from CTB10‐4 to R16‐14 and jumper from R16‐14 to K23‐14 (See wire 154 in Figure 9). 16. Wire from R16‐1 to K23‐9 with jumper from K23‐9 to K23‐13 (Double K23‐13 with wire “C” and (155) (See wire 155 in Figure 9). Safety Campaign #4935 C500D6RE Door Switch Logic Corrective Action Page 10 of 13 https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2022/tsb220176.html 3/23/2023 17. Wire from K23-5 to 52G‐C2 of rear panel (See wire 156 in Figure 9). Note: Roadside rear louver and rear breaker cover will need to be removed to gain access. 18. Wire from CTB22-4 to K23-8 (See wire 158 in Figure 9). 19. Wire from CTB27-4 to K23-12 (See wire 159 in Figure 9). Figure 9, Figure 4 Close Up R16 and K23 Testing Door Logic 1. Turn on battery power. 2. Plug paralleling plug into generator. 3. Close busbar door. 4. Measure DC voltage between pins 12 and 13 of the unterminated end of the paralleling harness. Warning! Touching pins 12 and 13 together can cause a 24 V short to ground. Safety Campaign #4935 C500D6RE Door Switch Logic Corrective Action Page 11 of 13 https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2022/tsb220176.html 3/23/2023 Document History • Meter leads should be set as follows: Positive lead pin 12, negative lead pin 13. • Voltage should be 0 VDC. 5. Repeat with the busbar door open. • Voltage should be 24 VDC. End of Repair Campaign Filing Instructions: Fail Code: PRWHMW Account Code: 65 Authorization Code: 4935 Applicable SRT’s: • 00-902: 0.3 hours – Administrative time (shop) • 00-90F: 0.2 hours – Administrative time • 99-999: 7.0 hours – Install Door Switch Kit Part Availability Service parts are available. See Table 2 for part numbers. Table 2, Service Parts Part Description Part Number Order Instructions Retrofit kit for Door Switch for 500KW Towable Girtz Part Number KTS20- 0015-A01 Contact Girtz Industries Inc via email at sales@girtz.com Date Details 2022-8-17 Module Created 2022-8-19 Non-Product Problem Solving (PPS) 2023-3-20 Non-Product Problem Solving (PPS) Safety Campaign #4935 C500D6RE Door Switch Logic Corrective Action Page 12 of 13 https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2022/tsb220176.html 3/23/2023 Last Modified: 21-Mar-2023 Safety Campaign #4935 C500D6RE Door Switch Logic Corrective Action Page 13 of 13 https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2022/tsb220176.html 3/23/2023

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C. August22,2022 Charlotte NC 28269 Trailer-Mounted Generators for NHTSA Recall 22V-464: Generator Model Cummins Inc. Box 3005 Columbus, IN 47202-3005 USA Mail Code: 40911 Phone 1 800 CUMMINS care.cummins.com Generator Serial Number A220029583 A220030813 B210884042 B210885516 B210885518 B210887145 B210887146 B210889498 C210889838 C210891512 C210891525 C210894070 C2108941 16 C210899034 C210899996 C210902444 C210902684 D210914393 D210914621 D210914622 D210914623 D210914666 D210914968 D210919246 D210919357 D210919358 D210919359 D210919376 D210919456 D210919457 D210919496 D210919516 D210921355 D210922950 Trailer Vehicle Identification Number 1G9G2FH26N 1G9G2FH24N 1G9G2FH29L 1G9G2FH26L~ 1G9G2FH2XLrvall 1G9G2FH23L~ 1G9G2FH21L~ 1G9G2FH2XLrvall 1G9G2FH28Mrvall 1G9G2FH21Mrvall 1G9G2FH23Mrvall 1G9G2FH27Mrvall 1G9G2FH25Mrvall 1G9G2FH26Mrvall 1G9G2FH24Mrvall 1G9G2FH22Mrvall 1G9G2FH25Mrvall 1G9G2FH28Mrvall 1G9G2FH2XM~ 1G9G2FH27Mrvall 1G9G2FH24M 1G9G2FH27M 1G9G2FH25M 1G9G2FH20M 1G9G2FH23M 1G9G2FH28M 1G9G2FH29M 1G9G2FH29M 1G9G2FH22M 1G9G2FH26M 1G9G2FH23M 1G9G2FH25Mrvall 1G9G2FH28Mrvall 1G9G2FH26Mrvall Cummins Inc. Box 3005 Columbus, IN 47202-3005 USA Mail Code: 40911 Phone: 1 800 CUMMINS care.cummins.com D210922951 1G9G2FH21MM D210922953 1G9G2FH20MM D210922954 1G9G2FH22MM D210922955 1G9G2FH26MM D210922958 1G9G2FH27MM D210922959 1G9G2FH29MM D210922978 1G9G2FH2XMM D210923008 1G9G2FH2XMM E210929300 1G9G2FH28MM F210940629 1G9G2FH28MM F210941624 1G9G2FH26MM F210944937 1G9G2FH24MM F210951663 1G9G2FH24MM F210951664 1G9G2FH26MM G210957304 1G9G2FH21MM G210957358 1G9G2FH28MM G210957359 1G9G2FH23MM G210957378 1G9G2FH2XMM G210957633 1G9G2FH29MM G210957786 1G9G2FH27MM G210957804 1G9G2FH25MM G210958701 1G9G2FH20MM G210958702 1G9G2FH29MM G210958712 1G9G2FH22MM G210960166 1G9G2FH24MM G210960167 1G9G2FH2XMM G210960168 1G9G2FH26MM G210960169 1G9G2FH28MM G210960170 1G9G2FH2XMM G210960171 1G9G2FH21MM G210960172 1G9G2FH23MM G210960182 1G9G2FH26MM J200824749 1G9G2FH23LM J200824971 1G9G2FH25LM J200836024 1G9G2FH26KM L200856302 1G9G2FH24KM C. —— — —————– — —- — — Cummins Inc. Box 3005 Columbus, IN 47202 – 3005 USA Mail Code: 40911 Phone: 1 800 CUMMINS care cummins.com *** IMPORTANT SAFETY RECALL*** NHTSA Recall No. 22V-464 Cummins Campaign #C4935 August 22, 2022 Dear Cummins Customer: This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act. Cummins Inc. has decided that a defect which relates to motor vehicle safety exists in certain Cummins Power Generation C500D6Re trailer-mounted generator sets that were manufactured between November 3, 2020 and March 18, 2022. This notice applies to the generator(s) listed on the enclosed table. WHAT IS THE PROBLEM? If your generator set is being paralleled with certain other Cummins generator sets, when an operator opens the output box door of either generator set, the controls may not shut down all the generator sets operating in parallel as intended. If the operator is not aware that the generator sets have not shut down, there is a risk he or she may contact energized electrical conductors, which presents the risk of burns, electric shock or arc flash, possibly resulting in personal injury. WHAT ARE WE DOING ABOUT THE PROBLEM? Cummins has released Safety Campaign #C4935 “C500D6RE Door Switch Logic Corrective Action” to address this condition by installing a wiring harness modification kit to address this condition. This campaign is currently available at Cummins Distributors and authorized Warranty Dealers. The repair will be completed free of charge and most applications will require approximately 5 hours to complete. WHAT SHOULD YOU DO? Contact the nearest Cummins Distributor or authorized Warranty Dealer to arrange to have this safety action performed on your generator. The distributor or dealer will work with you to schedule the best date to complete this repair. In the meantime, Cummins advises operators to heed the safety labels warning of exposure to energized electrical conductors that are present on the door of the output box If you have not registered your Cummins product, please complete the enclosed registration card or register your product at https://prodreg.cummins.com/prodreg/#/webform/contactInfo. C. Cummins Inc. Box 3005 Columbus, IN 47202 – 3005 USA Mail Code: 40911 Phone: 1 800 CUMMINS care cummins.com If you are no longer the owner of the generators(s) listed on the enclosed table, please forward this notice to the new owner or provide the new owner’s contact information to Cummins so that we can notify them of this recall. Federal law requires vehicle lessors receiving this recall notice to forward a copy of this notice to the lessee within ten (10) days. Also, it is a violation of Federal law for a dealer to deliver a new vehicle or equipment covered by this recall notice under a sale or lease until the defect has been remedied. If you previously paid to have this recall performed on your vehicle, you may be eligible for reimbursement. Please contact the Cummins Care at the number below for more information. WHO SHOULD YOU CONTACT IF YOU HAVE FURTHER QUESTIONS OR CONCERNS? If you have questions or concerns about this recall, please contact your local Cummins Distributor or authorized warranty dealer. You may also contact Cummins Care at 1-800- CUMMINS (1-800- 286-6467), or visit our website at care.cummins.com. If you have a complaint relative to this recall, you may report it to the following: Administrator National Highway Traffic Safety Administration 1200 New Jersey Avenue, SE Washington, DC 20590 You may also call the toll-free Vehicle Safety Hotline at 1-888-327-4236 (TTY: 1-800-424-9153); or go to http://www.safercar.gov. Cummins is taking this action in the interest of your safety and satisfaction with our products. We apologize for any inconvenience and thank you for your attention to this matter. Sincerely, Campaign Administrator Cummins Inc. C.

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-464 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Cummins, Inc. Submission Date : JUL 06, 2022 NHTSA Recall No. : 22V-464 Manufacturer Recall No. : NR Manufacturer Information : Manufacturer Name : Cummins, Inc. Address : Box 3005 Mail Code COB118 Columbus IN 47202-3005 Company phone : 812-377-5000 Population : Number of potentially involved : 128 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2020-2022 Cummins Power Generation C500D6Re Vehicle Type : TRAILERS Body Style : Power Train : NR Descriptive Information : Cummins Power Generation generator sets mounted on trailers manufactured and certified by a third-party manufacturer (Girtz Industries Inc.). The recall population consists of all subject generator sets from the beginning of production until corrective action was implemented. Production Dates : NOV 03, 2020 – APR 18, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : If these generator sets are paralleled with certain other Cummins gensets, when an operator opens the output box door of either genset, the controls may not shut down all the gensets operating in parallel as intended. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : If the operator is not aware that the gensets have not shut down, there is a risk he or she may contact energized electrical conductors, which presents the risk of burns, electric shock or arc flash. Description of the Cause : The output box door switch logic is incompatible between the identified population of generator sets and certain other Cummins generators sets. Identification of Any Warning that can Occur : A warning label warning of exposure to energized electrical conductors is present on the door of the output box. Part 573 Safety Recall Report 22V-464 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Involved Components : Component Name 1 : NR Component Description : NR Component Part Number : NR Supplier Identification : Component Manufacturer Name : N/A Address : NR NR Country : NR Chronology : 2/14/22 – Cummins determined that there was a difference between the door switch logic on the subject model generator sets and certain other models of Cummins generator sets. 2/14 – 4/19/22 – Cummins investigated the issue and implemented changes to make the door switch logic consistent among generator set models. 4/19 – 6/28/22 – Cummins conducted a Product Safety Hazard Analysis and escalated the issue through its Product Safety Defect Determination process. 6/28/22 – Based upon the results of the investigation, the Cummins Product Safety Defect Board decided to conduct a safety campaign to address this condition. To date, there have been no reports of accidents or injuries. Description of Remedy : Description of Remedy Program : Cummins will replace the door switch with a new door switch that has the corrected logic. Cummins will submit a recall-specific reimbursement plan through the Recalls Portal. How Remedy Component Differs from Recalled Component : The remedy door switch will have a unique part number. Identify How/When Recall Condition was Corrected in Production : Production began with the remedy door switch on 4/19/2022. Part 573 Safety Recall Report 22V-464 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Recall Schedule : Description of Recall Schedule : Cummins is currently developing the schedule for the recall, but in any case, will notify customers with either interim letters or owner letters by September 2, 2022. Planned Dealer Notification Date : NR – NR Planned Owner Notification Date : NR – NR * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-464 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Cummins, Inc. Submission Date : AUG 03, 2022 NHTSA Recall No. : 22V-464 Manufacturer Recall No. : C4935 Manufacturer Information : Manufacturer Name : Cummins, Inc. Address : Box 3005 Mail Code COB118 Columbus IN 47202-3005 Company phone : 812-377-5000 Population : Number of potentially involved : 128 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2020-2022 Cummins Power Generation C500D6Re Vehicle Type : TRAILERS Body Style : Power Train : NR Descriptive Information : Cummins Power Generation generator sets mounted on trailers manufactured and certified by a third-party manufacturer (Girtz Industries Inc.). The recall population consists of all subject generator sets from the beginning of production until corrective action was implemented. Production Dates : NOV 03, 2020 – APR 18, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : If these generator sets are paralleled with certain other Cummins gensets, when an operator opens the output box door of either genset, the controls may not shut down all the gensets operating in parallel as intended. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : If the operator is not aware that the gensets have not shut down, there is a risk he or she may contact energized electrical conductors, which presents the risk of burns, electric shock or arc flash. Description of the Cause : The output box door switch logic is incompatible between the identified population of generator sets and certain other Cummins generators sets. Identification of Any Warning that can Occur : A warning label warning of exposure to energized electrical conductors is present on the door of the output box. Part 573 Safety Recall Report 22V-464 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Involved Components : Component Name 1 : NR Component Description : NR Component Part Number : NR Supplier Identification : Component Manufacturer Name : N/A Address : NR NR Country : NR Chronology : 2/14/22 – Cummins determined that there was a difference between the door switch logic on the subject model generator sets and certain other models of Cummins generator sets. 2/14 – 4/19/22 – Cummins investigated the issue and implemented changes to make the door switch logic consistent among generator set models. 4/19 – 6/28/22 – Cummins conducted a Product Safety Hazard Analysis and escalated the issue through its Product Safety Defect Determination process. 6/28/22 – Based upon the results of the investigation, the Cummins Product Safety Defect Board decided to conduct a safety campaign to address this condition. To date, there have been no reports of accidents or injuries. Description of Remedy : Description of Remedy Program : Cummins will alter the electrical circuit to remedy the door switch logic. Cummins will submit a recall-specific reimbursement plan through the Recalls Portal. How Remedy Component Differs from Recalled Component : The remedy kit (to alter the circuit) will have a unique part number and when installed will be visibly different than the unremedied electrical circuit. Identify How/When Recall Condition was Corrected in Production : Production began with the remedy door switch logic on 4/19/2022. Part 573 Safety Recall Report 22V-464 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Recall Schedule : Description of Recall Schedule : Cummins expects to release a safety campaign and to notify owners by September 2, 2022. Planned Dealer Notification Date : SEP 02, 2022 – SEP 02, 2022 Planned Owner Notification Date : SEP 02, 2022 – SEP 02, 2022 * NR – Not Reported

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