English
16
Night Quiet Mode Setting
• If Night Quiet Mode is to be used, initial settings must be made when the unit is installed. Explain Night Quiet Mode, as
described below, to the customer, and confirm whether or not the customer wants to use Night Quiet Mode.
About Night Quiet Mode
The Night Quiet Mode function reduces operating noise of the outdoor unit at nighttime. This function is useful if the customer
is worried about the effects of the operating noise on the neighbors.
However, if Night Quiet Mode is running, cooling
capacity will be saved.
Setting procedure
Turn the Night Quiet Mode switch (SW6-1) to on.
HEAT Mode Lock
<SW5-1>
• Use the HEAT Mode Lock switch (SW5-1) in the
“ON” position.
COOL Mode Lock <S15>
• Use the S15 connector to set the unit to cool only.
Setting to only cool (C) : short-circuit pins 3 and 5 of the connector <S15>
The following specifications apply to the connector housing and pins.
ST products Housing: VHR-5N
Pin:
SVH-21T-1,1
Note that forced operation is also possible in COOL mode.
Service PC-board
Heat Mode Lock (SW5-1)
(SW6-1)
ON
OFF
COOL
4
3
2
1
2
1
E
D
C
B
A
Screw
Night Quiet Mode
setting switch
Remove
the switch
cover
COOL mode (C)
1
3
5
