AirStage AO54FJ, Service Manual

Page: 113 / 169

Description Indoor unit Remote indication
Indicates that the power came on normally when power
was applied (at power failure recovery). Indication is
cleared by RUN command.
The red and green lamps flash
alternately in the operation stop
state.
When test run is performed, the unit operates
without regard to the temperature setting. Stopped by
remote controller stop. or reset after 60 minutes.
The red and green lamps flash
simultaneously in the operation
state.
TEST
Operation is stopped and refrigerant is passed through
the indoor unit to remove the outdoor unit frost
(defrosting operation) or to recover the refrigerant oil
(oil recovery operation). The indoor unit stops in about
5-10 minutes.
The fan stops and the refrigerant
passes through. The red lamp
flashes slowly.
DEFROST
The fan is stopped to prevent blowing out of cold air
when the machine is still not warm at the start of
heating operation. About 3 minutes are necessary.
The fan stops and the red lamp
lights steadily.
When the room temperature at heating operation reaches
the set temperature, the FAN is stopped and room
temperature rise is prevented. At this time, the fan is
operated periodically to detect the room temperature.
(4 minutes stop, 1minute operate)
The fan continues to operate and
the red lamp lights steadily.
When an [AUTO], [FAN] and an operation other than the
operation another indoor unit is already performing at
cooling/heating selection type or [HEAT] operation at a
cooling only unit is commanded, operation cannot be
performed at that setting.
Buzzer buzzes 5 times and setting
is not received. Operation before
setting continues.
After cooling operation stops, the drain pump is
operated. Remains for 3 minutes.
Flowing liquid
sound during
operation
A sound changed by the refrigerant flow may be made
by operation of another indoor unit connected to the
same outdoor unit. A switching sound may be made at
the start and after the end of defrosting operation and
oil recovery operation.
Squeaking sound
This is due to expansion and contraction of resin parts
by the temperature change during heating operation
and oil recovery operation.
Switching sound
A sound is generated when the internal valve is
switched at operation switching and at the start
of defrosting operation and oil recovery operation.
Makes a sound even after operation
stops.
Makes a sound
while operating.
Fan turns on/off periodically.
RUN signal is input, but is not
accepted. Buzzer sounds.
Operation
Red and green lamps flash
alternately.
Red lamp flashes.
Indoor unit fan does not operate
even through the RUN signal has
entered.
From the standpoint of control, the following operations are incorporated for air conditioner operation
and protection. They do not indicate trouble.
Operation not trouble
When operation and indication other than the above occurs, call the manager.
6-5 CASES SUCH AS THESE ARE NORMAL
06-43