Mitsubishi Electric PUHY-P250YHM-A Data Book page 37

(4) Switch setting
● The suction/discharge temperature control of the indoor unit.
Either suction temperature control or discharge temperature control can be selected .
The suction/discharge temperature control can be switched by the switches (SWC) on the controller circuit
board inside the controller of the indoor unit.
The discharge temperature control is selected at factory shipment. (SWC is set to "Standard.")
To switch the control, set SWC on two controller circuit boards inside the controller as follows.
To perform suction temperature control: Set SWC to "Option (OP)"
To perform discharge temperature control: Set SWC to "Standard"
The setting for the SWC on the two controller circuit boards must be the same (applicable only when con-
necting to a two-refrigerant circuit).
*Only the suction temperature control is performed in the heating mode regardless of the SWC setting.
(5) Dehumidification priority control
This unit can be operated in the dehumidification priority control by receiving external signals (CN52 on
indoor unit).
The unit goes into the dehumidification priority control when dehumidification signal is received for 10 con-
tinuous minutes during cooling operation. The unit resumes normal operation when the signal goes off or
when the suction temperature reaches 13˚C or below.
When the unit is in this control, the unit is operated at the maximum capacity regardless of the actual set-
ting, so the room temperature may reach below the preset temperature.
If this is a problem, install a circuit that turns off the dehumidification signal based on the room temperature.
The model of units described in this manual does not support the reheat function, so it does not allow both
the temperature and humidity to be controlled simultaneously.
(6) Normal/Local switching switch (SW9)
When selecting the "Local" mode using the Normal/Local switching switch beside the MA remote controller
on indoor unit, the local operation is enabled, and the remote ON/OFF operation (external input or system
controller) is disabled.
If no external input is available, the local operation is enabled in both "Nomal" and "Local" modes.
The occurred error is not reported to the upper system, such as building management system including sys-
tem controller. (If an error occurs during inspection, the occurred error is reported only to the units, and the
error history remains on the units.)
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