indoor
blower fan
four-way
valve
outdoor
blower fan
compressor
1
-15° C
Tr
10° C
0° C
Heating (only applicable to dual temperature units)
●
Start up the compressor: when the room temperature is less than or equal to Ts-1
℃
, compressor
→
start-up
●
Shut down the compressor: when the room temperature is more than or equal to the set temperature Ts+1
℃
,
compressor
→
shutdown
●
The electric heating start-up in the heating mode shall meet the following conditions:
①
start up the
compressor for three minutes and indoor blower fan
②
Tr
≤
Ts
-
3
℃
③
TP1< 46
℃
④
Tr
≤
23
℃
.
●
The electric heating shutdown in the heating mode shall meet one of the following conditions:
①
shutdown the indoor blower fan
②
Tr
≥
26
℃
③
TP1
≥
50
℃
④
change mode.
●
When the temperature of coil pipe of indoor units is more than or equal to 56
℃
, the outdoor blower fan
shuts down and it enters the overload protection; when the temperature of coil pipe of indoor units is less
than or equal to 52
℃
, the outdoor blower fan starts up and it exit the overload protection.
●
When the temperature of coil pipe of indoor units rises to 65
℃
, the compressor and outdoor blower fan are
closed and two minutes later, the change valve is closed. The indoor blower fan is running at the set speed.
Restart up six minutes later; if the above situations appear again within ten minutes, all the outputs are shut
down through the electric control board and the display failure.
Summary of Contents for NBFS-48IDU
Page 3: ...1 Summary ...
Page 7: ......
Page 8: ...use of remote controller ...
Page 9: ......
Page 12: ......
Page 13: ......
Page 14: ......
Page 15: ......
Page 16: ......
Page 17: ......
Page 18: ......
Page 19: ......
Page 20: ......
Page 21: ...3 indoor explosive view for 40k ...
Page 22: ...outdoor explosive view for 40k ...
Page 24: ...5 CIRCUIT DIAGRAM 43K INDOOR ...
Page 25: ...43K OUTDOOR ...