Allen-Bradley 2198-H070-ADP-T

Common Fault Codes

Fault Code: Bus Overvoltage

The DC bus voltage has exceeded the allowable threshold, which can occur during deceleration if regenerative energy is not properly managed.
Verify the regenerative bus supply is correctly sized and operational. Check bus capacitance and ensure the 2198-H070-ERS supply is functioning. Review deceleration ramp times in the Logix controller.

Fault Code: Bus Undervoltage

The DC bus voltage has dropped below the minimum operating level, indicating a loss of input power or a fault in the bus supply module.
Check the three-phase AC input voltage to the bus supply. Inspect fusing and contactors upstream of the 2198-H070-ERS. Verify bus bar connections at the adapter are secure and undamaged.

Fault Code: Bus Power Loss

The drive system has detected a loss of DC bus power, which may be caused by a disconnected or improperly seated bus adapter.
Inspect the 2198-H070-ADP-T for proper seating and secure mechanical connection. Check bus bar contact integrity and verify no physical damage to the adapter module.

Fault Code: Hardware Overtemperature

The drive or bus supply module has exceeded its thermal limits, often due to inadequate cooling or excessive load.
Verify enclosure ventilation and ambient temperature are within specification. Check that cooling fans in the drive system are operational. Reduce duty cycle or derate the system if ambient temperature exceeds 40 °C.

Fault Code: Module Not Compatible

The system has detected a module that is not compatible with the configured bus supply or axis modules, which can occur if an incorrect adapter variant is installed.
Confirm that the 2198-H070-ADP-T is matched to the correct bus supply class (70A). Cross-reference the catalog number against the system design documentation and Rockwell Automation compatibility tables.

Fault Code: Drive Enable Fault

The drive enable signal is not present or has been removed unexpectedly, preventing axis operation.
Check the hardware enable wiring to the bus supply and axis modules. Verify the Logix controller program is asserting the drive enable output. Inspect safety circuit integrity if a safety option is installed.

Fault Code: Precharge Fault

The DC bus precharge sequence did not complete successfully, which may indicate a fault in the bus supply or a wiring issue.
Inspect the AC input power quality and verify all three phases are present and balanced. Check the precharge resistor and associated circuitry in the 2198-H070-ERS bus supply. Replace the bus supply if the precharge circuit is determined to be faulty.