Function; Auto Restart; Icing Protection Control; Oil Recovery Operation - Fujitsu Airstage V series Service Manual

5-6 FUNCTION

5-6-1 Auto Restart

The air conditioner restarts with the previous setting operation.

5-6-2 Icing Protection Control

The icing of the indoor heat exchanger is prevented during the cooling and dry mode operation.
(1) Starting Condition
Compressor is operation more than 3 minutes.
When "Heat exchanger inlet temperature
Compressor is operation more than 3 minutes.
When "Heat exchanger middle temperature
(2) Operation
EEV is closed.
Fan is at the setting amount.
(3) Completing Condition
Heat exchanger inlet and middle temperature
After more than 5 minutes
*
Drain pump turns off at 60 minutes past the completion of the icing protection operation.
T
A
*1°C
*Compact wall and Ceiling wall are 3°C

5-6-3 Oil Recovery Operation

[Oil recovery operation] : It periodically returns the residual refrigerant ion oil in the indoor unit and the connection
Indoor unit LED : Operation LED
Indoor fan : Same operation before oil recovery operation. (Cooing mode)
Stop (Heating mode)
Indoor EEV : Control pulse
During the above operation, a refrigerant noise may be from the indoor unit.
T " continues *10 minutes or more.
A
T " continues 4 minutes or more.
A
T
B
T
B
7°C
piping back to the outdoor unit , and prevents the compressor oil level from decreasing.
3 sec ON 1 sec OFF Blinking
*Compact wall and Ceiling wall are 4 minutes
05-08