Special Function, Operation | Mitsubishi Electronics PKA-A30KA4.TH

10 SPECIAL FUNCTION

10-1. Rotation Function (and back-up function, 2nd stage cut-in function)

This function is only available when using wired remote controller.

10-1-1. Operation

(1)Rotation function (and Back-up function) Outline of functions

•Main and sub units operate alternately according to the interval of rotation setting.

wMain and sub unit should be set by refrigerant address. (Outdoor Dip switch setting)

Refrigerant address "00" Main unit

Refrigerant address "01" Sub unit

• When error occurs to one unit, another unit will start operation. (Back-up function)

System constraint

•This function is available only by the grouping control system (INDOOR UNIT: OUTDOOR UNIT=1:1) of 2 refrigerant groups. (Refer to Fig. 1)

•Main indoor unit should be connected for wired remote controller and the transmission line (TB5) for main and sub unit should also be connected. (Refer to Fig. 1)

(This function cannot be set by wireless remote controller.)

•Set refrigerant address of each unit. (Dip switch on the outdoor unit ··· Refrigerant address 00/01)

Operation pattern

[Back-up function only]··· Request code number "312"

	Start operation		Error occurs on main unit.
	Start operation		Main Sub
Main
Main
unit				Abnormal condition
unit		Run
IC-1		Run
IC-1


Sub
unit		Stop		Run
IC-2

[Rotation function] & [Back-up function]··· Request code number "313~318"

Fig. 1 Refrigerant address

	"00"

		OC-1
Main
Main	3(2)
unit	3(2)
unit

		IC-1

	2		2

		RC

Refrigerant address "01"

OC-2

Sub

3(2) unit

IC-2

Error occurs on main unit.

Start operation

Main

Sub

Main Main

Sub

Main

Abnormal condition

unit

Run

Stop

Run

IC-1

Sub

unit

Stop

Run

Stop

Run

IC-2

1~28 days

(Ex:When the request code number is "313", each unit operates alternately in daily cycle.)

OC : Outdoor unit

IC : Indoor unit

RC : Wired remote controller

Note:

•When the unit is restarted to operate after turning off the power or OFF operation, the unit which was operating will start oper- ation.

•To operate the main unit, refer to the 10-1-2. and set the request code No. which is not the same as the current one, and set again the former request code No.

(2)2nd stage cut-in function Outline of functions

•When the 1st unit can NOT supply with sufficient capacity for exceptionally high-demand conditions and the actual room temperature reaches set point *, the 2nd unit starts operation in conjunction with the 1st unit.

•Once the actual room temperature goes down to 4 degrees C (7.5 degrees F) below set point*, the 2nd unit stops operation automatically.

(* set point = set temperature by R/C (remote controller) + 4, 6, 8:(7.5, 10.8, 14.4°F) (selectable))

•Number of operating units is determined according to the room temperature and set point.

•When room temperature becomes higher than set point, standby unit starts. (2 units operation)

•When room temperature falls below set point -4:(-7.5°F), standby unit stops. (1 unit operation)

PKA-A36KA4.TH, PKA-A30KA4.TH, PKA-A24KA4.TH specifications

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