Daikin FTX25JVEA9, Service Manual

Page: 146 / 410

Si18-201 System control
Main Functions 133
Details The input current is used to control the upper limit of the operating frequency in order to
maintain the temperature around the electric parts under a certain level during cooling overload
condition.
When the outside temperature (DOA) is higher than 38°C, input current upper-limit value I3CH
(27) A is decreased at a rate of (96/128) A/°C.
Similarly, the input current value in controlled in inverter microcomputers to protect the inverter
parts.
Outside Air
Temperature
I3CH
20 27.0
22 27.0
24 27.0
26 27.0
28 27.0
30 27.0
32 27.0
34 27.0
36 27.0
38 27.0
40 25.5
42 24.0
44 22.5
46 21.0
20.0
21.0
22.0
23.0
24.0
25.0
26.0
27.0
28.0
29.0
30.0
20 25 30 35 40 45 50
Outside air temperature
Input current limit control
(M1021)
Inverter current limit control General input current limit control
Stop zone
Drooping
zone
No-change zone
28A
26A
25A
Stop zone
Drooping
zone
No-change zone
31A
29A
28A
(M1022)