Specifications

CONTROLLER (Feb. 2009)
CNTR-17
CONTROLLER
DATA U4
3. SYSTEM CONTROLLER
3-4-1-2-2. TB3 and DC 12V, 0.2A
G-50A can also receive power supply from TB3 connector of the R410A or R407C, R22 Outdoor unit.Yet, Outdoor unit down
will lead down to G-50A too. The kind of connection is possible but not recommended air conditioner system of multiple
Outdoor units. The DC 12V 0.2A can be supplied at TB3 connector of PAC-SC50KUA, or a field supplier power complying
specification at Ta ble 3-4-1.
Field supplied power
(DC12V 0.2A)
Indoor/outdoor transmission line
CN41
TB3
Fig.3-4-3 G-50A, TB3 and field supplied DC 12V scheme.
3-4-1-2-3. The effect on connectable quantity of Indoor unit when TB7 or TB3 is used to supply power to the G-50A.
As Indoor unit controller and system controllers share the power supply from the Outdoor unit, the total power consumption of
control use needs following considerations.
Taking the power consumption of the control board of Indoor unit as 1, the equivalent power consumption of the system con-
troller is as follows.
Ta ble 3-4-2 The equivalent power consumption of controllers.
Central controller
(G-50A)
Other system controllers
ON/OFF remote controller
(PAC-YT40ANRA)
System remote controller
(PAC-SF44SRA)
Schedule timer (PAC-YT34STA)
10.50.5
Indoor unit
1
*In order to ensure the transmission quality in start-up of outdoor unit (or during communication traffic), the number of
system controllers which connected to indoor/outdoor transmission line in the same system, should not exceed3.
CAUTION
Any trouble caused by the failure of the field supplied DC12V power source is not responsible by Mitsubishi Electric Corporation.
When applying Charge and/or Peak-cut function on G-50A, Power Supply Unit (PAC-SC50KUA) is recommended to use. G-50A is possible to
receive power from the one of the Outdoor units, but there is a risk that the failure of power supply from the Outdoor unit will cause G-50A's
function-down on the whole system.
At the air conditioner system of multiple Outdoor units, the connector of CN41 is changed to CN40 at only one of the Outdoor units when TB7 is
used to supply power. When the Outdoor unit failed, the connector at another unit can be changed from CN41 to CN40 to recover the power
supply, but remember to change the CN40 back to CN41 at the failed Outdoor unit.