AirStage AO54FJ, Service Manual

Page: 63 / 169

05-09
5-6-2 Auto Restart
(1) The air conditioner restarts with the previous setting operation.
(2) When the air conditioner restarts for heating operation, the "COLD AIR DISCHARGE PREVENTION FUNCTION"
operates.
5-6-3 Icing Protection Control
The icing of the indoor heat exchanger is prevented during the cooling and dry mode operation.
(1) Starting Condition
Heat exchanger middle temperature =< T
A
Comperessor is operation more than 10 minutes.
(2) Operation
EEV is fully opened.
Fan is at the setting amount.
(3) Completing Condition
Heat exchanger middle temperature >= T
B
After more than 5 minutes
*
Drain pump turns off at 60 minutes past the completion of the icing protection operation.
T
A
and T
B
are selected by DIP-SW.
DIP-SW 5-3 T
A
T
B
OFF
ON
1
4
7
8
5-6-4 Cold Air blowing protection control
During the heating operation, the cold air blowing is protected.
The indoor fan operation is limited at the starting the heating mode when the heat exchanger middle temperature
is higher than 27 C.
5-6-5 Defrosting Operation, Oil Recovery Operation
[Defrosting Operation] : It prevents the heating capacity decrease due to the adhered ice on the outdoor heat
exchanger.
[Oil Recovery Operation] : It periodically returns the residual refrigerantion oil in the indoor unit and the connection
piping back to the outdoor unit, and prevents the compressor oil level from decreasing.
Indoor Unit LED : Operation LED
3 sec ON 1 sec OFF Blinking
Indoor Fan : Stop
Indoor EEV : Control pulse
*
During the above operation, a refrigerant noise may be heard from the indoor unit.