Forced Operation Mode - Daikin F-Series Service Manual

SiEN12-710A
Detail
Judgment by Input Current
When an output frequency is exceeds 51 Hz (40 class) or 48 Hz (50 class) 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 higher than 101°C, the electronic expansion value opening
is 450 plus (max.) and the adjustment is made for insufficient gas.
2.12.4 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.

2.13 Forced Operation Mode

Outline
Forced operating mode includes only forced cooling.
Detail
Forced Cooling
Forced operation allowing
conditions
Starting/adjustment
1) Determine operating room All rooms must operate.
2) Command frequency
3) Electronic expansion
valve opening
4) Outdoor unit adjustment
5) Indoor unit adjustment
End
Others
Function and Control
Item
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.
The forced operation is allowed when the above "and" conditions are
met.
When the indoor unit on/off button is pressed for continuous 5 second
as the above conditions are met.
70Hz (40 class), 47Hz (50 class)
It depends on the capacity of the operating indoor unit.
Compressor is in operation.
The command of forced cooling operation is transmitted to all indoor
units.
1) When the indoor units on/off button (of the unit which sent the
command) is pressed again.
2) The operation is to end automatically after 15 min.
The protect functions are prior to all others in the forced operation.
Control Specification
Forced Cooling
57