Forced Operation Mode - Daikin D-Series Service Manual

Si12-619A
3.13.4 Preventing Indoor Freezing
During cooling, if the heat exchanger temperature in the operation stopped room becomes
below the specified temperature for the specified time, open the electronic expansion valve in
the operation stopped room as specified, and carry out the fully closed operation. After this, if
freezing abnormality occurs more than specified time, the system shall be down as the system
abnormality.
3.14

Forced Operation Mode

Outline Forced operating mode includes functions such as; forced cooling, forced heating, incorrect
wiring, incorrect piping check.
Operating mode must be selected by operating the forced operation switch.
Detail Forced Cooling, Forced Heating (Only for Heat Pump Model)
Forced operation
allowing conditions
Starting / adjustment If the forced operation switch is
1) Determine
operating room
2) Command
frequency
3) Electronic
expansion valve
opening
4) Outdoor unit
adjustment
5) Indoor unit
adjustment
End
Others
Function and Control
Item Forced Cooling
1) The indoor unit is not abnormal, but
the indoor unit which is not in the
freezing prohibiting zone is present in
more than 1 room.
2) The outdoor unit is not abnormal
and not in the 3-minute stand-by
mode.
3) The operating mode of the outdoor
unit is the stop mode.
4) The slide selection switch of the
forced operation is the cooling mode.
The forced operation is allowed when
the above "and" conditions are met.
pressed as the above conditions are
met.
All rooms
,
2YC32 2YC36: 52 Hz
2YC45: 42 Hz
2YC63: 31 Hz
It depends on the capacity of the
operating indoor unit.
Compressor is in operation.
The command of forced operation is
transmitted to the indoor unit.
1) When the forced operation switch is
pressed again.
2) The operation is to end
automatically after 60 min.
The protect functions are prior to all
others in the forced operation.
Control Specification
Forced Heating
1) The indoor unit is not abnormal.
The indoor unit which is not in the
peak-cut prohibited zone is present in
more than 1 room.
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4) The slide selection switch of the
forced operation is the heating mode.
The forced operation is allowed when
the above "and" conditions are met.
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One of the available units runs.
Priority is given to the youngest
number's room in alphabetical order.
(A > B > C > D)
(outdoor air: 2°C)
2YC32: 42 Hz
(outdoor air: 0°C)
2YC36: 42 Hz
(outdoor air: 2°C)
2YC45: 35 Hz
(outdoor air: 2°C)
2YC63: 26 Hz
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