Crown SC4000:
error codes 302, 306, 312, 317

SC4510-30 with the above codes.
Does anyone have a listing?
  • Posted 13 Jun 2014 07:28
  • Discussion started by mowers
  • Alberta, Canada
Showing items 1 - 2 of 2 results.
Good afternoon friend, I have a similar equipment, it occasionally throws me event code 327, there is not much information in the service manual, you will have more information.
thank you so much!
an affectionate greeting
David Fuenzalida
302: Access 3 Logic Error #2, error in the U,V,W voltage feedback circuit: STEP1: Check line contactor is connected and getting proper voltage, 36v at pull-in then 24v continous. Check tips. STEP 2: Check traction motor cables at motor and Access 3 for shorts and continuity.

306: Voltage present at B+ terminal before powerup. STEP 1: Check line contactor tips. STEP 2: Check power cables are not shorted, if OK replace Access 3.

312: Line contactor driver open. STEP 1 Disconnect CA403 at Access 3 and check resistance between pin 26 and pin 27 on wire harness, should be 70-78ohms. If OK, step 3, if not ok, Step 2. STEP2: Disconnect line contactor coil wires and measure coil resistance, should be 70-78ohms. Out of range, replace coil, if in range, issue lies in wiring from Access 3 to coil on aformentioned pins. STEP 3: Replace Access 3

317: Brake Pedal Error, Brake Switch BRKS1 and brake pot POT2 mismatch. Go to Analyzer menu A2.2.3 and verify brake pot is between 15-20% when BRKS1 changes from zero to one as you slowly depress the pedal. Calibrate in calibration menu or manually adjust as required. There are a lot more fault finding steps for this code but normally its just a mismatch and I can't be bothered typing them all in.

Your major issue is in the first 3 codes, worry about those first...hope someone hasn't plugged a charger into the truck by mistake and fried Access 3!
  • Posted 15 Jun 2014 13:03
  • Reply by techno_nz
  • Canterbury, New Zealand

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