• Code: 342.344
• Description: C Exit Fan Fail. The C Exit Fan error was detected.
• Remedy: Enter dc122 Fault History. Has 341.350 faults (MD PWB F7 Open) occurred? Y↓ N→Turn the power Off and remove the Rear Upper Cover. Disconnect the connector P592 of the MD PWB and open the Chassis Assembly. Turn the power On and enter Service Diagnostics (Entering Service Diagnostics). Turn On dc330 Component Control [042--025] (NOHAD FAN Failure Detection). Is the C Exit Fan rotating and does the test return a C Exit Fan error? Y↓ N→When the Diag is turned On, is the voltage between the MD PWB P/J529-B13 (+) and the GND (-) +24VDC? Y↓ N→Turn the power Off and replace the MD PWB. Turn the power Off and check the connection between the C Exit Fan P/J227 and the MD PWB P/J529 for open circuit, short circuit, and poor contact. If no problems are found, replace the following parts in sequence: • C Exit Fan • MD PWB Replace the C Exit Fan. Press the Stop button and turn the power Off. Check the connection between the C Exit Fan P/J227-2 and the MD PWB P/J529-B15 for open circuit, short circuit, and poor contact. If no problems are found, replace the MD PWB. Go to the 341.350 RAP.

• Code: 342.400
• Description: Deodorant Filter Life End. The Deodorant Filter must be replaced.
• Remedy: Replace the Deodorant Filter and clear the dc135 CRU/HFSI Read & Reset [954-860].

• Code: 342.604
• Description: NOHAD Temperature Sensor Fail. The NOHAD Thermistor error was detected.
• Remedy: Turn the power Off and check the connection between the NOHAD Thermistor P/J130 and the MCU PWB P/J414 for open circuit, short circuit, and poor contact. Also check whether there is poor connection or foreign substances at the detection section of the NOHAD Thermistor. If no problems are found, replace the following parts in sequence: • NOHAD Thermistor • MCU PWB

• Code: 342.609
• Description: LH Fan Fail. The LH Fan 1-3 error was detected.
• Remedy: Enter dc122 Fault History. Has 041-355 faults (MD PWB F10 Open) occurred? Y↓ N→Turn the power Off. Open the L/H Cover and cheat the L/H Cover Interlock Switch. Disconnect and reconnect the LH Fan PWB P/J453, P/J454, LH Fan 2 P/J217, and LH Fan 3 P/J218. Rotate the LH Fan 1-3 manually to check for loading. Turn the power On and enter Service Diagnostics (Entering Service Diagnostics). Turn On dc330 Component Control [042-025] (NOHAD FAN Failure Detection). Are the LH Fan 1-3 rotating and does the test return a LH 1, 2, 3 Fan error? Y↓ N→Press the Stop button. Is the voltage between the LH Fan PWB J450-5 (+) and the GND (-) +24VDC? Y↓ N→Remove the Rear Upper Cover. Is the voltage between the MD PWB J523- B13 (+) and the GND (-) +24VDC? Y↓ N→Turn the power Off and replace the MD PWB. Turn the power Off and check the connection between the MD PWB P/J523 and the LH Fan PWB P/J450 for open circuit, short circuit, and poor contact. Turn On dc330 Component Control [042-026] (LH Fan) and measure the following voltages: • Between the LH Fan PWB P/J453-1 (+) and the GND (-) (LH Fan 1) • Between the LH Fan PWB P/J454-1 (+) and the GND (-) (LH Fan 2) • Between the LH Fan PWB P/J454-5 (+) and the GND (-) (LH Fan 3) Is the voltage +24VDC? Y↓ N→Turn the power Off and check the connection between the MD PWB P/J523 and the LH Fan PWB P/J450 for open circuit, short circuit, and poor contact. If no problems are found, replace the following parts in sequence: • LH Fan PWB • MD PWB • MCU PWB Press the Stop button and turn the power Off Check the following connectors for open circuits, short circuits, and poor contacts. • Between the LH Fan PWB P/J454 and the LH Fan 2 P/J217 • Between the LH Fan PWB P/J454 and the LH Fan 3 P/J218 If no problems are found, replace the appropriate LH Fan (1-3). Replace the LH Fan. Press the Stop button. Turn the power Off and check the following: • Check the connection between the LH Fan 2 P/J217-3 and the LH Fan PWB P/ J454-3 for open circuit, short circuit, and poor contact. • Check the connection between the LH Fan 3 P/J218-3 and the LH Fan PWB P/ J4544-7 for open circuit, short circuit, and poor contact. • Check the connection between the LH Fan PWB P/J450-2 and the MD PWB P/ J523-B16 for open circuit, short circuit, and poor contact. If no problems are found, replace the following parts in sequence: • LH Fan PWB • MD PWB Go to the 341.355 RAP.

• Code: 345.310
• Description: Image Ready NG. The Controller image preparation failure was detected.
• Remedy: 1. Turn the power Off and On. 2. Turn the power Off and check whether there is poor connection or foreign substances at the following connectors. • Between BP PWB and MCU PWB P/J451 • Between BP PWB J335 and I/P PWB P335 • Between BP PWB J309 and I/P PWB P309 If no problems are found, replace the following parts in sequence: • BP PWB • MCU PWB

• Code: 345.311
• Description: Controller Communication Fault. Communication error between I/P PWB and MCU PWB was detected.
• Remedy: 1. Turn the power Off and On. 2. Turn the power Off and check whether there is poor connection or foreign substances at the following connectors. • Between BP PWB and MCU PWB P/J451 • Between BP PWB J335 and I/P PWB P335 • Between BP PWB J309 and I/P PWB P309 If no problems are found, replace the following parts in sequence: • BP PWB • MCU PWB

• Code: 345.312
• Description: Drive Logic Fault A fatal error was detected in Drive control.
• Remedy: 1. Turn the power Off and On. 2. Install the correct version of the IOT firmware. 3. Initialize the IOT NVM (includes writing back the adjustment NVM). If the problem persists, replace the MCU PWB.

• Code: 345.313
• Description: ENG_LOGIC_FAIL Engine internal mismatch (control logic mismatch)
• Remedy: 1. Turn the power Off and On. 2. Install the correct version of the IOT firmware. 3. Initialize the IOT NVM (includes writing back the adjustment NVM). If the problem persists, replace the MCU PWB.