Led Indications On The Unit - Mitsubishi Electric Procon IO-INTERFACE Installation Manual

7. LED Indications on the Unit

LED1 is the top LED.
The unit has 6 LEDs which are all visible through the case of the unit.
Their functions are:
- LED1: 'Power' - Blue
During the establishing of communications this LED will flash approximately once per second.
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Once communication is established the LED will remain permanently ON
- LED2 : 'Run' – Green
The Run LED will illuminate when the associated unit is ON. This LED flashing indicates a
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'Standby' or 'Fault' condition
- LED3 : 'Fault' – Red
The Fault LED will illuminate when the associated unit is in a fault condition or when the
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'External Fault' input is activated
- LED4: 'Thermo' – Yellow
This LED will illuminate when the associated unit is in the 'Thermo' state i.e.
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More than 1 degrees below the local setpoint in Heat or Auto modes
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More than 1 degrees above the local setpoint in Cool or Auto modes
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- LED5: 'Active State' – Yellow
This LED will illuminate when the associated unit is in the selected 'Active' state (Heat or Cool as
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selected by bit switch)
- LED 6: 'Comms' – Yellow
The Comms LED displays the communications activity and should be flashing approximately
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once per second
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