10
English
Turn off the power.
• When the power is shut off, the characters in the
remote controller display disappear.
• When the power is on, the unit consumes up to
several dozen Watts of power.
Turn off the power to conserve energy.
Clean the air filter and exterior.
• After cleaning the air filter, be sure to put it back in
the same position.
See the operation manual included with the
indoor unit for details on how to clean it.
• If the water piping may freeze, keep operating the
heat source water pump operating even during
the unit stops.
• Remove all the water from the unit and the water
piping if the pump is not used for a long time in
winter.
9. FOLLOWING SYMPTOMS ARE NOT
AIR CONDITIONER TROUBLES
9-1
THE SYSTEM DOES NOT OPERATE
•
The air conditioner does not start immediately
when restarting the operation after stoping
the operation or when putting the temperature
back after changing the temperature setting
with the temperature adjust button.
If the operation lamp lights, the system is in nor-
mal condition.
To prevent overloading of the unit, the air condi-
tioner starts 5 minutes after it is turned ON again
in case it was turned OFF just before.
•
If “Centralized Control” is displayed on the
remote controller and pressing the operation
button causes the display to blink for a few
seconds.
This indicates that the central device is controlling
the unit.
The blinking display indicates that the remote
control cannot be used.
•
The system does not start immediately after
the power supply is turned on.
Wait one minute until the micro computer is pre-
pared for operation.
9-2
IT STOPS SOMETIMES
•
The remote controller display reads “U4” or
“U5” and stops but then restarts after a few
minutes.
This is because the remote control is intercepting
noise from electrical appliances other than the air
conditioner, and this prevents communication
between the units, causing them to stop.
Operation automatically restarts when the noise
goes away.
9-3
COOL/HEAT CANNOT BE CHANGED
OVER
•
When the display shows
“
”
(changeover under control).
It shows that this is a slave remote controller.
Refer to “Setting the master remote controller”.
•
When the cool/heat selector switch is
installed and the display shows
“
”
(changeover under control).
This is because cool/heat changeover is con-
trolled by the cool/heat selector. Ask your Daikin
dealer where the remote control switch is
installed.
9-4
FAN OPERATION IS POSSIBLE, BUT
COOLING AND HEATING DO NOT
WORK
•
Immediately after the power is turned on.
The micro computer is getting ready to operate.
Wait 10 minutes.
•
Only fan operation is possible.
This is because the interlock contact point is not
turned on. (Check that the water pump is operat-
ing.)
This is because the inlet temperature (*1) of the
heat source water is beyond the operating condi-
tions (refer to page 5). (Check that it is in the
range of the operating conditions.)
9-5
THE FAN SPEED DOES NOT CORRE-
SPOND TO THE SETTING
•
The fan speed does no change even if the fan
strength adjustment button in pressed.
• When the room temperature reaches the set tem-
perature during heating operation (extremely low
fan speed operation).
• When operation is changed to fan operation while
another indoor unit is in heating operation
(extremely low fan speed operation).
• When the remote controller displays “
”
(stoppage).
• When the remote controller displays “
” (auto-
matic operation).
9-6
THE AIR FLOW DIRECTION DOES
NOT CORRESPOND TO THE SETTING
•
The air flow direction does not correspond to
the remote control display.
The air flow direction does not swing.
This is because the unit is being controlled by the
microcomputer. Refer to “Adjusting the air flow
direction”.
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