In the event that mirror ventilation does not automatically start, follow this procedure to manually start and stop a defrost cycle:

To Start Manual Defrost

  • In ECS > MV tab
    • Click/open the Display Valve Control Panel
      • On the offending side, switch the control and modulating valves to Manual mode
      • Switch Normally Closed valves to Open
      • Switch Normally Open valves to Closed
      • Set the modulating valves to 25% open
    • Click/open the Display Heater Control Panel
      • On the offending side, switch the defrost heaters to Manual mode
      • Click Run on both heaters

To Stop Manual Defrost

  • Following the above, undo the steps:
    • Set Defrost Heaters to Automatic mode
    • Set Normally Open Valves to Automatic mode
    • Set Normally Closed Valves to Automatic mode
    • Set Modulating Valves to Automatic mode

-- SteveAllanson - 08 May 2013
Topic revision: r1 - 08 May 2013, SteveAllanson
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