Specifications for the main component requirements:
Components Specifications Remarks
Auxiliary relay (X1, X2)
Mini power relay, MY1F (or MY2F)
made by OMRON
220/240 V
Changeover switch (SS2, SS3) Manual switch 220/240 V
3-pin connector cable
PCC-1A (connected to a JST,
XARP-3 connector)
5 cables with connectors in a single
assembly
Cable
(Inside the unit)
Low voltage 0.3 mm
2
less than 24 V
220/240 V 0.5 to 0.75 mm
2
—
Cable
(Outside the unit)
Low voltage 0.5 to 0.75 mm
2
less than 24 V
220/240 V 2 mm
2
—
N O T E
• The terminal cable must be as short as possible.
• Do
not
place the cables alongside the high voltage cables. Maintain at least 30 cm of distance between the
cable and the high voltage cable. The cables may be crossed. If necessary to place the cables alongside the
high voltage cable, insert the low voltage cables inside a metal conduit and ground it one of the end. If sealed
cables are used for the low voltage cables, ground it one of the end of the shield cable. The maximum length
must be within 70 m.
¿ Fixing of the heating mode (Control function number 1)
Fixing of the cooling mode (Control function number 2)
• When the input terminals for setting the operation mode of the outdoor unit PCB1 are short-circuited, the operation
mode can be fixed for cooling or heating mode.
• Short-circuit between terminals 1 and 2 (input 1) of the CN17 to fix heating operation mode.
• Short-circuit between terminals 2 and 3 (input 2) of the CN17 to fix cooling operation mode.
• During the setting of heating (or cooling) mode, cooling (or heating) mode will not be available. The indoor units in
cooling or dry operation (or heating operation) will be switched to Thermo-OFF condition during the setting of the
operation, and stoppage code number “20” is given.
-Setting example:
a 3-pin connector
b Outdoor unit PCB1
c Control circuit
d Power source
X1 Auxiliary relay (cool)
X2 Auxiliary relay (heat)
SS2 Switch for fixing the operation mode
SS3 Switch for changing the operation mode
6 Optional functions
117
SMGB0065 rev. 1 - 12/2010
6
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