Mitsubishi Electric MXZ-3C68VA Service Manual download pdf (Page 52)

10-4. AUTO LINE CORRECTING

Outdoor unit has an auto line correcting function which automatically detects and corrects improper wiring or piping.

Improper wiring or piping can be automatically detected by pressing the piping/wiring correction switch (SW871).

When improper wiring or piping is detected, wiring lines are corrected.

This will be completed in about 10 to 20 minutes.

[How to activate this function]

1. Check that outside temperature is above 0°C .

(This function does not work when outside temperature is not above 0°C.)

2. Check that the stop valves of the liquid pipe and gas pipe are open.

3. Check that the wiring between indoor and outdoor unit is correct.

(If the wiring is not correct, this function does not work.)

4. Turn ON the power supply and wait at least 1 minute.

5. Press the piping/wiring correction switch (SW871) on the outdoor P.C. board.

Do not touch energized parts.

Make sure that the valves are open and the pipes are not collapsed or clogged.

6. Press the switch to cancel.

NOTE: Indoor unit cannot be operated while this function is activated.

When this function is activated while indoor unit is operating, the operation will be stopped.

Operate indoor unit after the auto line correcting is finished.

Pressing the switch during detection cancels this function.

LED1(Red)

Lighting

LED indication during detection:

LED indication after detection:

LED2(Yellow)

Lighting

LED3(Green)

Blinking

LED1(Red)

Lighting

LED indication after cancel:

LED2(Yellow)

Lighting

LED3(Green)

Goes Out

LED1(Red)

Lighting

Blinking

LED2(Yellow)

Goes out

Blinking

Other indications

LED3(Green)

Lighting

Blinking

Completed (Detected

successfully)

Cannot be corrected

Refer to "SAFETY PRECAUTIONS WHEN LED FLASHES" located behind the service panel.

Indication

<MXZ-4C80VA, MXZ-5C100VA, MXZ-6C120VA>

The record of auto line correcting can be confirmed in the following way:

Press the switch for more than 5 sec.

LED will show the record of auto correcting for about 30 sec. as shown in the table below:

NOTE: Activate this function to confirm the correct wiring after replacing the outdoor P.C. board.

(Previous records are deleted when the oudoor P.C. board or the control P.C. board is replaced.)

The record cannot be shown if auto line correcting is not canceled (Refer to "How to activate this function").

LED1(Red)

Once

3 times

LED2(Yellow)

Once

3 times

LED3(Green)

Lighting

Not corrected

Corrected

Number of blinks

Wiring line

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 269 270

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Mitsubishi Electric MXZ-3C68VA Service Manual Page 52

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