Toshiba MMU-AP0091H Snowfall Fan Control, External master ON/OFF control, Input signal Operation

7-2-2-3. Snowfall Fan Control

Header outdoor unit interface P.C. board

		CN509 (4P BLK)
	Connection cable
External master	PJ17		(4P WHI)
ON/OFF
control board

HEAT COOL COM

SMC

Procured locally (Snow sensor)

Operation

The outdoor unit fan operates when a Snowfall signal is received.

Terminal	Input signal	Operation
	ON	Snowfall fan control
	OFF	(Operates outdoor unit fan.)
COOL
(SMC)
	ON	Usual operation
	OFF	(Releases control.)

The control contents are accepted during leading and trailing of the input signal.

(The status of leading and trailing should be held for 100mm. sec. or more.)

External master ON/OFF control board : TCB-PCMO 2E

Outdoor unit destination to be connected becomes the header outdoor unit (U1).

SMC: Snowfall detection switch

7-2-2-4. External master ON/OFF control

Header outdoor unit interface P.C. board

		CN512 (4P BLU)
	Connection cable
External master	PJ17		(4P WHI)
ON/OFF
control board

HEAT
	COOL	COM

SMC

SMH

Procured locally

Operation

The outdoor unit starts or stops the system.

Terminal	Input signal	Operation
COOL	ON	Starts collectively indoor units.
(SMC)	OFF
Heat	ON	Stops collectively indoor units.
(SMH)	OFF

The control contents are accepted during trailing of the input signal. (The status of trailing should be held for 100mm. sec. or more.)

NOTES

1)Do not turn on COOL and HEAT terminals concurrently.

2)Be sure to prepare a contact for each terminal. Outside signal: No voltage pulse contact

External master ON/OFF control board : TCB-PCMO 2E

Outdoor unit destination to be connected becomes the header outdoor unit (U1).

SMC: Input signal for start.

SMH: Input signal for stop.

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