Won’t start beeps when it the start button. Customer says error code once F70 interface board doesn’t light up either. F70 says if the drum isn’t Turing to replace the CCU.
Power is going through the filter and to CCU. The machine still only beeps every time you hit the start button and no lights on the interface. Try to put into diagnostic mode won’t do that either. Also F70 & F71 all relate to the CCU how are we supposed to know what is the right part to replace?
- Guest asked 8 years ago
The F70 & F71 Code is the CENTRAL CONTROL UNIT HEARTBEAT FAILURE
If a Central Control Unit Heartbeat Failure is displayed,
no communication is detected from the Central Control
Unit (CCU) to the User Interface.
Possible Causes/Procedure
1. Check for continuity of the User Interface harness.
2. Check wire harness connections to the User Interface
and Central Control Unit.
3. If the drum is not rotating, unplug the MCU from the
CCU (the MI3 or M13 connector). If the code goes
away, then replace the MCU. If the code does not go
away, replace the CCU.
4. Replace User Interface if drum is rotating.
Hope this helps Thanks Matt Ace Technician
- AV Repair Help answered 8 years ago
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