Daikin FTKE25BVM, Service Manual

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Control Specification Si12-411A
104 Function and Control
Detail Judgment by Input Current
When an output frequency is exceeds 55 Hz and the input current is less than specified value,
the adjustment is made for insufficient gas.
Judgment by Discharge Pipe Temperature
When discharge pipe temperature is 20°C higher than target value and the electronic expansion
value opening is 450 plus (max.), the adjustment is made for insufficient gas.
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)
Item Forced Cooling Forced Heating
Forced operation
allowing conditions 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. 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.
2) The outdoor unit is not abnormal
and not in the 3-minute stand-by
mode.
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3) The operating mode of the outdoor
unit is the stop mode.
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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. 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.
Starting / adjustment If the forced operation switch is
pressed as the above conditions are
met.
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1) Determine
operating room All rooms 1 room operation, with the room that
can enable operation and its NO is the
smallest (A>B>C>D). Other rooms
operation must be stopped.
2) Command
frequency 2YC32: 52 Hz
2YC45: 42 Hz 2YC32: 44 Hz
(Outdoor air temp:0°C)
2YC45: 37 Hz
(Outdoor air temp:0°C)
3) Electronic
expansion valve
opening Depending on the capacity of the
operating indoor unit.
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4) Outdoor unit
adjustment Compressor is in operation
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5) Indoor unit
adjustment Transmit the command of forced
draft to the indoor unit
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End 1) When the forced operation switch is
pressed again.
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2) The operation is to end
automatically after 30 min.
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Others The protect functions are prior to all
others in the forced operation.
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