• Code: 55.02.YY
• Display: 55.02.YY Outgoing Parity Error
• Description: There is a DC controller outgoing parity error
• Remedy: 1. Turn the product off and then on. 2. Perform an engine test. 3. Verify the connectors on the DC controller. 4. Replace the DC controller

• Code: 55.03.YY
• Display: 55.03.YY No Engine Response
• Description: DC controller no response error.
• Remedy: 1. Turn the product off and then on. 2. Perform an engine test. 3. Verify the connectors on the DC controller. 4. Replace the DC controller

• Code: 55.04.YY
• Display: 55.04.YY Communications Timeout
• Description: There was a DC controller communications time out.
• Remedy: 1. Turn the product off and then on. 2. Perform an engine test. 3. Verify the connectors on the DC controller. 4. Replace the DC controller

• Code: 55.05
• Display: 55.05 ENGINE FIRMWARE RFU ERROR
• Description: Firmware upgrade failed.
• Remedy: 1. Turn the product off and then on. 2. Remove any third-party hardware. 3. Resend the firmware upgrade.

• Code: 56.01
• Display: 56.01 - Illegal input
• Description: There was an illegal input.
• Remedy: 1. Turn the product off and then on. 2. Remove any third-party hardware. 3. Attempt the remote firmware update again. 4. Replace the DC controller.

• Code: 56.02
• Display: 56.02 - Illegal output
• Description: There was an illegal output.
• Remedy: Turn the product off and then on.

• Code: 57.03
• Display: 57.03 Error
• Description: The cartridge area cooling fan (FM2) experienced an error.
• Remedy: 1. Reconnect the connector J26 of the cartridge fan, connector J262 on the high voltage power supply D PCA, and connector J114 on the DC controller PCA. 2. Immediately after turning on the product, measure the voltage between the connector J262-1 and J262-3 on the high-voltage power supply D PCA. If the voltage changes from 0 V to approximately 24 V, replace the cartridge fan.

• Code: 57.04
• Display: 57.04 Error
• Description: The low-voltage power-supply fan (FM1) experienced an error.
• Remedy: 1. Reconnect the connector J119 on the DC controller PCA. 2. Immediately after turning on the product, measure the voltage between the connector J119-1 and J119-3 on the DC controller PCA. If the voltage changes from 0 V to approximately 24 V, replace the power-supply fan.