Operation Not Trouble - Fujitsu R407C Service Manual

5-6 CASES SUCH AS THESE ARE NORMAL

Operation not trouble

From the stand point of control, the following operations are incorporated for air conditioner operation
and protection. They do not indicate trouble.
Operation
Red and green lamps flash
alternately, or simultaneously.
Red lamp flashes.
Indoor unit fan does not operate
even through the RUN signal has
entered.
Fan turns on/off periodically.
Remote controller airflow indication
flashes.
Heating operation is performed
when stopped.
RUN signal is input, but is not
accepted. Buzzer sounds.
Makes a sound even after operation
stops.
Flowing liquid
sound during
operation
Makes a sound
while operating.
Squeaking sound
Switching sound
When operation and indication other than the above occurs, call the manager.
Description
Indicates that the power came on normally when power
was applied (at power failure recovery). Indication is
cleared by RUN command.
When test run is performed, the unit operates
without regard to the temperature setting. Stopped by
remote controller stop, or reset after 60 minutes
maximum.
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 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.
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)
This is the filter cleaning time. After cleaning the filter,
press the ZONE/SET key for a few seconds to be
released .
Anti-freeze operation is set so that the water pipe and
electronic devices do not freeze. Operation starts at
room temperature ‚T•Ž or less and continues until the
room temperature reaches 8•Ž or more.
When operation is inhibited during central control by
central remote controller, the buzzer that denies the
wireless remote controller signals sounds.
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.
Timer setting cannot be performed by wireless remote
controller at an indoor unit with wired remote controller
connected. Set the timer from the wired remote
controller.
The valve opens to return the refrigerant collected
inside the indoor unit to the outdoor unit even after
operation stops. Remains for about 4 minutes maximum.
After cooling operation stops, the drain pump is
operated. Remains for 3 minutes.
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.
This is due to expansion and contraction of resin parts
by the temperature change during heating operation
and oil recovery operation.
A sound is generated when the internal valve is
switched at operation switching and at the start
of defrosting operation and oil recovery operation.
The red and green lamps flash
alternately in the operation stop
state.
The red and green lamps flash
simultaneously in the operation
state.
The fan stops and the refrigerant
passes through. The red lamp
flashes slowly.
The fan stops and the red lamp
lights steadily.
The fan continues to operate and
the red lamp lights steadily.
Same as normal.
At standby, the red lamp flashes
and the fan continues to operate.
At operation, the heating operation
is performed.
Buzzer buzzes 5 times and setting
is not received. Operation before
setting continues.
Buzzer buzzes 5 times and setting
is not received. Operation before
setting continues.
Buzzer buzzes 5 times and setting
is not received. Operation before
setting continues.
05 - 46
Indoor unit Remote indication
TEST
DEFROST
Airflow indication
flashes
ANTIFREEZE
CENTRAL