Cummins/Onan GTA8.3-G2 Engine Engine

• Warning lamp lights. MESSAGE: OVERLOAD 330
  Fix: Contact an authorized service center.
• Warning lamp lights. MESSAGE: OVERCURRENT 320
  Fix: Contact an authorized service center.
• Warning lamp lights. 213
  Fix: Indicates that the resistance of the coolant temperature sender is out of range. Contact an authorized service center.
• Shutdown or Warning lamp lights. 214, 215
  Fix: Indicates engine coolant level has fallen below the trip point. Allow engine to cool down completely before proceeding. a. Check coolant level and replenish if low. Look for possible coolant leakage points and repair if necessary. b. Reset control and restart after locating and correcting problem. Contact an authorized service center.
• Shutdown lamp lights. MESSAGE: UNDER FREQUENCY 313
  Fix: Contact an authorized service center.
• Shutdown lamp lights. MESSAGE: SHORT CIRCUIT 322
  Fix: Contact an authorized service center.
• Shutdown lamp lights. MESSAGE: REVERSE POWER 335
  Fix: Contact an authorized service center.
• Shutdown lamp lights. MESSAGE: OVERCURRENT 321
  Fix: Contact an authorized service center.
• Shutdown lamp lights. MESSAGE: LOW AC VOLTAGE 303
  Fix: Contact an authorized service center.
• Shutdown lamp lights. MESSAGE: HIGH AC VOLTAGE 301
  Fix: Contact an authorized service center.
• Shutdown lamp lights. 220
  Fix: Indicates mag pickup speed indication is not being sensed or does not match generator set output frequency. a. Restart and check RPM on the digital display. b. Contact an authorized service center.
• Non-Automatic lamp flashes.
  Fix: Indicates Run/Off/Auto switch is not in the Auto position. This will prevent automatic starting if an automatic transfer switch is used. Move the Run/Off/Auto switch to the Auto position for automatic operation.
• No AC output voltage.
  Fix: Contact an authorized service center.
• Engine will not crank. 221
  Fix: Indicates possible fault with control or starting system. Check for the following conditions: a. Poor battery cable connections. Clean the battery cable terminals and tighten all connections. b. Discharged or defective battery. Recharge or replace the battery. c. Contact an authorized service center for service of starter and starting system.
• Engine starts from generator control panel but will not start automatically or from a remote panel.
  Cause: Check the control wiring between the remote switch and the PCC.
  Fix: Contact an authorized service center.

Compiled from service & troubleshooting documentation across every generator set that uses the Cummins/Onan GTA8.3-G2.

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.