Mitsubishi Electric PUHY-P250YHM-A, Data Book

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(2) Sequential starting of indoor unit fan and outdoor unit compressor is possible by setting the indoor unit
address.
Startup time of each unit when operation signals are sent via MELANS
Startup time of each unit when operation signals are sent via the MA remote controller
MELANS group number (example)
Indoor unit (address)
Fan/compressor sequential
startup time (Notes 1)
Indoor unit (address)
Fan/compressor sequential
startup time (Notes 1 and 2)
01
01
0 second
02
02
1 second
17
17
16 seconds
50
50
49 seconds
···
···
···
···
···
···
···
···
···
···
(Note 1) Sequential startup time for the main unit is 0, regardless of the address that is assigned to it.
(Note 2) The maximum sequential startup time is 8 seconds when operation signals are sent via the MA remote
controller.
01
0.5 seconds
02
1 second
17
0.5 seconds
16
16
15 seconds
16
8 seconds
50
1 second
5. System control
(1) System control for the indoor units
1. Various start/stop control (Indoor unit setting)
(1) The restart setting for the indoor unit can be set with the DIP SW (SW1-9, 10) on the unit.
Operation recovery after power failure Function
Setting (SW1)( Note 4 )
Power reset
(Notes 1, 2, and 3)
Automatic recovery after
power failure(Note 3)
(Note 1) Do not turn off the power to the outdoor unit.
Turning off the power to the outdoor unit cuts of the power to the crankcase heater, and this may lead to
compressor failure when the operation is resumed after power failure.
(Note 2) Power resetting cannot be performed on the models with both a drain pump and a humidifier. Power resetting
this type of models will cause water leakage.
(Note 3) This setting can be used when SWC is turned off.
(Note 4) Dipswitches on all indoor units need to be set.
Indoor unit will go into operation within approximately five minutes of
power restoration regardless of its operation status before power off
(or power failure).
Indoor unit will go into operation within approximately five minutes of
power restoration if it was in operation when the power was turned off
(or power failure).
Indoor unit will remain stopped regardless of its operation status before
power off (or power failure).
9 10
ON OFF
OFF OFF
OFF ON
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