8-7. Defrosting Operation (Heating)
■
Reverse-cycle Defrosting
Heating operation
Frost sensing
Reverse-cycle defrosting operation
Defrosting Sequence
Releasing of defrosting
Outdoor heat exchanger temp.
Ambient temp.
Frosting
area
0
–13
●
Compressor ON
●
4-way valve ON
Frosting is assumed under the following condition.
Refer to the "defrost zone" on next page.
●
Air conditioner operates with outdoor heat exchanger
temperature lower than L1 for 3 minutes.
●
Integrated operating time of compressor is longer
than 20 minutes.
●
●
●
Defrosting operation lasts 12 minutes (maximum).
Outdoor heating exchanger temp. is over 12
°
C.
150 seconds has elapsed from defrosting start.
●
●
●
●
Compressor
➞
ON
Outdoor fan
➞
OFF
4-way valve
➞
OFF
Indoor fan
➞
Cold draft prevention mode
–6
–7
–12
–18
L2
L1
●
Air conditioner operates with outdoor heat exchanger
temperature lower than L2 for 120 minutes.
NOTE
25
