C7311 (C4751i)

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ByEric Ditges
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Contents

Trouble typeC7311: Machine cooling fan failure
RankC
Trouble detection conditionAfter starting the fan, an error is detected for the malfunction detection signal.
Trouble isolation–
Relevant electrical partsMachine cooling fan (FM1)Base board (BASEB)

Procedure

  1. Check the connector between FM1-relay CN23-BASEB CN19E for proper connection and correct as necessary.
  2. Check the connector of FM1 for proper drive coupling and correct as necessary.
  3. FM1 conduction check
    • Control signal: BASEB CN19E-4 (REM), BASEB CN19E-6 (LOCK)
    • Location of electrical component: 10-C
  4. Replace FM1.
  5. Replace BASEB.

(Link to the Field Service Manual)