En-8
POWER
71
WARNING
Always use a special branch circuit and install a special receptacle to supply power to
the air conditioner.
Use a special branch circuit breaker and receptacle matched to the capacity of the air
conditioner. (Install in accordance with standard.)
Perform wiring work in accordance with standards so that the air conditioner can be
operated safely and positively.
Install a leakage special branch circuit breaker in accordance with the related laws
and regulations and electric company standards.
CAUTION
When the voltage is low and the air conditioner is difficult to start, contact the power
company the voltage raised.
TEST RUN
81
The test run method may be different for each indoor unit that is connected. Refer to the
installation Manual included with each indoor unit.
CAUTION
Always turn on the power 12 hours prior to the start of the operation in order to ensure
compressor protection.
Make a TEST RUN in accordance with the installation Manual
81 11
for the indoor unit
CHECK ITEMS
81 11 11
(1) INDOOR UNIT
Is operation of each button on the remote controller normal?
(
1
)
Does each lamp light normally?
(
2
)
Do the air flow-direction louver operate normally?
(
3
)
Is the drain normal?
(
4
)
Is there any abnormal noise and vibration during operation?
(
5
)
(2) OUTDOOR UNIT
Is there any abnormal noise and vibration during operation?
(
1
)
Will noise, wind, or drain water from the unit disturb the neighbors?
(
2
)
Is there any gas leakage?
(
3
)
Do not operate the air conditioner in the test running state for a long time.
•
For the operation method, refer to the operating manual and perform operation check.
•
Outdoor unit LEDS
81 21
When a malfunction occurs in the outdoor unit, the LED on the circuit board lights to
indicate the error. Refer to the following table for the description of each error according to
the LED.
Error contents
LED 1
LED 2
LED 3
LED 4
Communication error
(outdoor unit to indoor unit A) ●1 time
-
-
-
Communication error
(outdoor unit to indoor unit B)
-
●1 time
-
-
Communication error
(outdoor unit to indoor unit C)
-
-
●1 time
-
Communication error
(outdoor unit to indoor unit D)
-
-
-
●1 time
Discharge temp. sensor error
●2 times
-
-
-
Outdoor unit Heat Ex. middle temp. sensor error
●3 times
-
-
-
Outdoor temp. sensor error
●4 times
-
-
-
2 way valve temp. sensor error(for Indoor unit A)
●5 times
-
-
-
2 way valve temp. sensor error(for Indoor unit B)
-
●5 times
-
-
2 way valve temp. sensor error(for Indoor unit C)
-
-
●5 times
-
2 way valve temp. sensor error(for Indoor unit D)
-
-
-
●5 times
3 way valve temp. sensor error(for Indoor unit A)
●6 times
-
-
-
3 way valve temp. sensor error(for Indoor unit B)
-
●6 times
-
-
3 way valve temp. sensor error(for Indoor unit C)
-
-
●6 times
-
3 way valve temp. sensor error(for Indoor unit D)
-
-
-
●6 times
Compressor temp. sensor error
●7 times
-
-
-
Heat sink temp. sensor error
●8 times
-
-
-
High pressure switch 1 error
●9 times
-
-
-
High pressure switch 2 error
●10 times
-
-
-
Indoor unit capacity error
●11 times
-
-
-
Trip detection
●12 times
-
-
-
Compressor rotor position detection error
●13 times
-
-
-
Error contents
LED 1
LED 2
LED 3
LED 4
Trip terminal L error
●14 times
-
-
-
Outdoor unit fan motor error
●15 times
-
-
-
Outdoor unit PCB microcomputer
communication error
●17 times
-
-
-
Discharge temperature error
●18 times
-
-
-
Compressor temperatuer error
●19 times
-
-
-
4 way valve error
●20 times
-
-
-
Outdoor unit PCB model information error
●21times
-
-
-
Active filter error, PFC circuit error
●22 times
-
-
-
● : flashing
- : Off
LED is on a reverse
side of the board.
Hole
LED4
LED3
LED2
LED1
PUMP DOWN
91
PUMP DOWN OPERATION
To avoid discharging refrigerant into the atmosphere at the time of relocation or disposal,
recover refrigerant by doing the cooling operation or forced cooling operation according to
the following procedure. (When the cooling operation cannot start in winter, and so on, start
the forced cooling operation.)
Do the air purging of the charge hose by connecting the charging hose of gauge
(
1
)
manifold to the charging port of 3 way valve (At lease one unit of connected units) and
opening the low pressure valve slightly.
Close the valve stem of 2 way valve (All connected units) completely.
(
2
)
Start the cooling operation or following forced cooling operation. (All connected units)
(
3
)
When using the remote controller Press the TEST RUN button after starting the cooling
operation by the remote controller. The operation indicator lamp and timer indicator
lamp will begin to flash simultaneously during test run. When using the MANUAL AUTO
button of the indoor unit (The remote controller is lost, and so on.) Keep on pressing
the MANUAL AUTO button of the indoor unit for more than 10 seconds. (The forced
cooling operation cannot start if the MANUAL AUTO button is not kept on pressing for
more than 10 seconds.)
Close the valve stem of 3 way valve (All connected units) when the reading on the
(
4
)
compound pressure gauge becomes 0.05~0 Mpa (0.5~0 kg/cm
2
).
Stop the operation. (All connected units) Press the START/STOP button of the remote
(
5
)
controller to stop the operation. Press the MANUAL AUTO button when stopping the
operation from indoor unit side. (It is not necessary to press on keeping for more than
10 seconds.)
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