Curtis Instruments 1238-6501 365936501 A.C. Motor Controller
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The Curtis Model 1238‑6501 is a 48–80 V, 550 A programmable AC motor controller used in industrial vehicles and EV conversions, featuring an embedded PLC and CAN bus for drive control and regenerative braking. Common failure points include the high‑current IGBT modules, power MOSFETs, and the integrated cooling fan or heat sink; firmware corruption can also cause loss of commutation or erroneous error codes. Begin diagnostics by verifying input voltage and ensuring the controller’s supply rails are within spec, then check for visible signs of overheating, burnt components, or loose connections on the IGBT board. Next, review any stored fault codes via the CAN interface or serial port, and perform a continuity test on the motor phase leads to rule out wiring faults.[oss-gpt-20b] |
Need your Curtis Instruments repaired or tested?
We specialize in the repair and refurbishment of high-end industrial control electronics and power systems like this unit.
- ⚙️ Fast Diagnostics – Same-day evaluation available
- 🔁 Reliable Turnaround – Most jobs ship within 5–10 business days
- 🧰 Expert Technicians – Decades of board-level experience
- ✅ 1-Year Warranty – Every repair fully guaranteed
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[oss-gpt-20b]We reclaim and repair GPUs and industrial AI hardware (cards, PSUs, fan modules, VRM boards). Free estimate — you only pay return shipping if you decline.
- 🔧 Board-level diagnostics (shorts, VRM, memory, fan, thermals)
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- ✅ 1-Year warranty on completed repairs
Free Estimates • Industrial-grade testing • 1-Year Warranty • Nationwide Service
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🚑Shop Location🛠️
Industrial Electronic Repair
145 Rockwell Place Ct
Tobaccoville, NC 27050
🚑 Rush repair shipments only — no walk-ins.
📞Phone
📦Mailing Address🚛
Industrial Electronic Repair
931-E S. Main St #204
Kernersville, NC 27284
📦 Mailing Address (for invoices or shipped repairs)
No walk-ins accepted.