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Troubleshooting and Test Functions
Fan Failed
Fan Failed
The cooling fan in the quaternary pump has failed.
The hall sensor on the fan shaft is used by the LPM board to monitor the fan
speed. If the fan speed falls below 2 revolutions/second for longer than
5 seconds, the error message is generated.
Probable Causes • Fan cable disconnected.
• Defective fan.
• Defective LPM board.
• Improperly positioned cables or wires obstructing fan blades.
Suggested Actions ❏ Ensure the fan is connected correctly.
❏ Exchange fan.
❏ Exchange the LPM board.
❏ Ensure the fan is not mechanically blocked.