Mitsubishi Heavy Industries KX6 series Service Manual Download

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'10 • KX-SM-148

(3) Outdoor fan snow protection control

(a) This control is enabled/disabled by entering data into 7-segment display.
(b) Setting method of outdoor fan control

[Starting conditions]

When following conditions are established for 10 minutes continuously.

(i) Snow protection control setting is valid ([P02]

1) and outdoor air temperature < 3°C or external input of outdoor fan

snow protection control ON. ([P07]

5 and CnS1 is shorted)

➀

Set the Code No. to “P02”.

➁

“0” or “1” is displayed at the data display area.

“0”: Outdoor fan control disabled (Factory setting)

“1”: Outdoor fan control enabled

➂

Press SW7 (Data write/delete) for 3 seconds continuously.

➃

“0” or “1” blinks every 0.5 second at the data display area.

➄

Press SW8 (one digit) to toggle the display back and forth between “0” and “1” (blinking).

➅

If SW7 is pressed for 3 seconds or longer continuously while “0 “ and “1” is blinking, the blinking stops.

With this operation, the enabled/disabled setting of outdoor fan control is stored in memory of EEPROM, and
henceforth the outdoor fan is controlled according to the contents of memory.

➆

Contents of the outdoor fan control are retained even if the power is turned off and backed on again.

(c) Contents of outdoor fan snow protection control

➀

If the outdoor air temperature drops 3°C or lower when the unit is all stop or error stop, the outdoor fan runs at the

rating speed (7th speed) once every 10 minutes.

➁

The outdoor fan runs for 30 seconds.*

*Operation time outdoor fan is changeable from 10 to 600 seconds by [P03]

➂

During this snow protection control, the compressor’s magnetic contactor (52X1 52X2) is ON.

(d) End conditions of outdoor fan snow protection control

When folowing conditions are established.
(i) Snow protection control setting is invalid ([P02]

0) or outdoor air temperature > 5°C and external input of outdoor

fan snow protection control OFF ([P07]-[5] and CnSlis opend).

(ii) Compressor ON
(iii) During all stop by anomaly

Valid

Invalid

Outdoor air temperature (°C )

(4) External output

This function is used in order to operate the external optional devices in conjunction with relay outputs of the respective
operation information from outdoor unit.

[External output function]

External output function of CnZ1 can be switched by changing of [P06] on 7-segment display as mentioned below.
0: Operation output

• When the outdoor unit operation mode is “Operation”, the external output relay is turned ON.

(Note) The “Operation” includes not only compressor ON mode but also Fan mode and thermostat OFF mode under the condition of remote controller

ON. But the anomalous stop is excluded.

1: Error output

• It is turned ON at anomalous stop, and turned OFF when “CHECK” and “RESET” buttons on remote controller are

pressed simutaneously after recovering from the anomaly. Even if “CHECK” and “RESET” buttons are pressed before
recovering from the anomaly, it is not turned OFF, but when recovering from the anomaly later, it is automatically
turned OFF.

2: Compressor ON output

• It is turned ON when the compressor is ON.

3: Fan ON output

• It is turned ON when the outdoor fan speed command > 0.

4: Oil return operation output

• This is turned ON during the oil return operation.

5: High pressure control output to water spraying device, etc.

• This is turned ON when the high pressure > 3.3 MPa during cooling operation.