Daikin VRV RXYQ72-384XAYCA Service Manual page 202

Field Settings for Outdoor Unit
[2-78]:
Heat pump lockout
[2-79]:
Heat pump lockout
release differential
When heat pump lockout mode has been set the auto backup function will automatically be set.
This will allow the auxiliary or secondary heat source to be automatically energized in the event of a
system failure.
Error codes capable of auto backup are listed in the table below.
Please be aware that the error codes that are not listed do not auto backup in order to protect the
unit.
195
Heat pump lockout temperature
Heat pump would be locked out when the outdoor air temperature is smaller than
the Heat Pump Lockout Temperature below – this setting is only affective when heat
pump lockout mode has been set. Unit will switch to heat pump lockout.
Fahrenheit (°F)
temperature
0 (default)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Heat pump lockout release differential
Heat pump would be resumed when the outdoor air temperature is recovered by
differential (below) above the heat pump lockout temperature.
Fahrenheit (°F)
0
1 (default)
2
Celsius (°C)
–15 –26.1
–10 –23.3
–5 –20.5
0 –17.7
5 –15
10 –12.2
15 –9.4
20 –6.6
25 –3.8
30 –1.1
35 1.6
40 4.4
45 7.2
50 10
Forced heat pump lockout
Celsius (°C)
5 2.8
10 5.6
15 8.3
SiUS342004EB
Part 5 Field Settings and Test Operation