Snowfall Fan Control; External Master On/Off Control - Toshiba Super MMU-AP0091H Service Manual

7-2-2-3. Snowfall Fan Control

Header outdoor unit interface P.C. board
External master
ON/OFF
control board
HEAT COOL
Procured locally (Snow sensor)

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

Header outdoor unit interface P.C. board
External master
ON/OFF
control board
HEAT COOL
SMH
CN509 (4P BLK)
Connection cable
PJ17
(4P WHI)
COM
SMC
CN512 (4P BLU)
Connection cable
PJ17
(4P WHI)
COM
SMC
Procured locally
Operation
The outdoor unit fan operates by the Snowfall signal from outside.
Terminal Input signal
ON
OFF
COOL
(SMC)
ON
OFF
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-PCM02E
Outdoor unit destination to be connected becomes the header
outdoor unit (U1).
SMC: Cooling Mode Select (switch)
Operation
The outdoor unit starts or stops the system.
Terminal Input signal
ON
COOL
(SMC)
OFF
ON
Heat
(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-PCM02E
Outdoor unit destination to be connected becomes the header
outdoor unit (U1).
SMH: Heating Mode Select (switch)
86
Operation
Snowfall fan control
(Operates outdoor unit fan.)
Usual operation
(Releases control.)
Operation
Starts collectively indoor units.
Stops collectively indoor units.