Daikin Sensira Series, Руководство по обслуживанию

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3 | Third party components
Service manual
132
FTXF20~71A + FTXF20~25B + FTXF20~42C + ATXF20~71A + ATXF20~42C
+ RXF20~71A + RXF20~60B + RXF20~42C + ARXF20~71A + ARXF20~42C
Split Sensira R32
ESIE18-12E – 2021.02
Cooling
Proper amount
Higher degree of
shortage
(Degree of shortage)
To maintain low pressure, operating
frequency decreases on the capacity control.
(Low pressure is
maintained at a
certain level.)
Operating
frequency
Low
pressure
High
pressure
Even with compressor
operating at lowest level,
low pressure drops
(refrigerant shortage).
Electronic expansion valve
fully opens.
The opening degree of the electronic
expansion valve comes larger.
Fan control, i.e.,
actually hunting to
maintain high pressure
on the cooling control
with low outdoor air.
Low pressure rises with increasing
opening degree of the electronic
expansion valve, and the operating
frequency slightly increases due to the
capacity control.
High pressure decreases
due to compressor
capacity decreasing.
Operating frequency comes
to the lowest level.
Heating
Frequency
Low
pressure
High
pressure
Proper amount
Higher degree
of shortage
(Degree of refrigerant shortage)
To maintain low pressure, frequency
initially increases due to the capacity
control. Frequency drops
due to the low pressure
drooping control.
(High pressure is
maintained at a
constant level.)
Frequency comes to
the minimum level.
Discharge pipe or low pressure drooping control.
The electronic expansion valve fully opens and frequency increases.
The opening degree of the electronic expansion valve becomes larger.
Is the refrigerant circuit charged
correctly? Action
Yes Return to the troubleshooting of the
specific error and continue with the
next procedure.
No Add or recuperate refrigerant until
correctly charged, see
"3.2.2 Repair
procedures" [
4
133].
To check for non-condensables in the refrigerant circuit
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
1 Wait for the refrigerant to reach the outdoor temperature.
2 Connect a manometer to the service port.