Daikin SkyAir RZQ200 · 250C7Y1B Service Manual page 75

Outdoor Unit
2.4.4.4 Hot Start Control (in Heating Operation Only)
The indoor unit fan is controlled to prevent cold air flow and secure a starting capacity when
starting up heating operation or completing defrosting.
2.4.4.5 Low Noise Control
A. In case of setting by remote controller (nighttime automatic low noise setting)
B. In case of contact input (manual low noise setting)
C. In case of required capacity prior
2.4.4.6 Outdoor Unit Fan Control
For continuing efficient operation, when high pressure elevates during cooling or low pressure
decreases during heating, fan air volume is increased.
64
Indoor unit fan:OFF
Indoor unit fan:LL tap
Indoor unit fan:L tap
Indoor unit fan:M tap
Indoor unit fan:Preset air volume
Using remote control setting, the current time is estimated based on the change in outdoor
air temperature to perform low noise operation by automatically limiting the outdoor unit fan
rotation speed and compressor operation frequency during nighttime (22:00 - 8:00) (The
nighttime hours should be regarded as a guide.)
Low noise operation is performed by limiting the outdoor unit fan rotation speed and
compressor operation frequency during a short circuit between T1 and T2 of the terminal
block X1M on the outdoor PC board.
When required capacity prior is set using the remote controller, if air conditioning load
increases in the case of A or B above, low noise operation is suspended and normal
operation is performed.
When required capacity prior is not set, low noise operation continues even if air
conditioning load increases.
Heating operation ON by remote controller
·
Indoor heat exchanger
&
·
OR High pressure>2.96MPa
·
5 minutes elapsed
·
1 minute elapsed with LL tap
&
·
OR
Indoor heat exchanger temperature>34ºC
·
6.5 minutes elapsed after compressor startup
·
1 minute elapsed with L tap
&
·
OR
Indoor heat exchanger temperature>34ºC
·
8.5 minutes elapsed after compressor startup
( If the indoor unit is not equipped
with an M tap, use the L tap again.
·
1 minute elapsed with M tap
&
·
OR
Indoor heat exchanger temperature>34ºC
·
10.5 minutes elapsed after compressor startup
<In case of RZQ200 and 250C>
Outdoor unit fan: Up to 7 steps (normal)
In cooling In cooling
Hp>3.14MPa Hp<2.74MPa
In heating In heating
Lp<0.61MPa Lp>0.71MPa
Outdoor unit fan: Up to 8 steps (heavy load)
SiBE26-701
temperature>34ºC
)
Function and Operation