Field Settings SiUS12-928_B
263 Trial Operation and Field Settings
5.1.3 NIGHT QUIET Mode
If NIGHT QUIET mode is to be used, initial settings must be made when the unit is installed.
Explain the function of NIGHT QUIET mode, as described below, to the customer, and confirm
whether or not the customer wants to use NIGHT QUIET mode.
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 is reduced.
Procedure
1. Remove the SW5 jumper switch on the service monitor PCB of the outdoor unit.
Once the settings are complete, reset the power.
2. Install the removed jumper switch as described below. This jumper switch is needed later to
disable this setting.
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