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Test operation setting method
Use the "MODE/EXIT", "SELECT", and "ENTER" buttons on the indoor unit PC board to
configure settings according to the procedures below.
First 2 digits Last 2 digits
For heating operation, press the "SELECT"
button until "01" is displayed.
Press the "ENTER" button for
more than 3 seconds.
This will be displayed
when the cooling test
operation is complete.
This will be displayed after 5 seconds.
Press the "ENTER" button for more than 3 seconds.
This will be displayed when the cooling operation mode is
canceled.
This will be displayed after 5 seconds.
EXIT
After the test operation is complete, turn off the power. Attach the cover of the electrical
component box and the front panel of the outdoor unit.
NOTES:
• Check that the indoor and outdoor units connected to the same refrigerant system are
operating normally.
• When indoor or outdoor units are not operating, or when the indoor and outdoor units
of other refrigerant systems are operating, the indoor/outdoor unit address are not
configured correctly.
• The system will not operate normally with an incorrect DIP switch setting.
Stop the system immediately and recheck the DIP switch setting.
9.4. Checklist
Check description
High and low pressure values
Check it with a pres-
1
are normal.
sure gauge.
Drain water is discharged
Check it by pouring
2
smoothly through the drain
water.
hose.
Indoor and outdoor unit fans
3
Check them visually.
are operating.
Compressor operates after
Check the operating
4
the indoor unit operates.
sound.
Difference between inlet and
Measure the inlet and
5
outlet temperatures is normal.
outlet temperatures.
Check the 7 segment
6 Error is not displayed
LED display
En-17
Function settings
Set to Function mode [F3].
(When [F4] to [F9] are displayed, continue to
press the "SELECT" button until [F3] is displayed.)
Settings for starting test run
operation
Press the "ENTER" button for
more than 3 seconds.
This will be displayed
when the heating test
operation is complete.
Settings for stopping test run
operation
Check method
Criteria
Cooling: low pressure ap-
prox. 116 psi (0.8 MPa)
Heating: high pressure ap-
prox. 435 psi (3.0 MPa)
―
―
―
Temperature difference 10
degrees
Error blinking or no error
code display
10. LED STATUS
You can determine the operating status by the lighting up and blinking of the LED display.
Check the status using the table below.
10.1. Normal operation codes
Mode
Code
C
L
Cooling
H
t
Heating
o
r During oil recovery operation
Operation
d
F During defrosting operation
P C During power saving operation
L
n During low noise operation
10.2. Error codes
Mode
Code
Communication
E
1 4. 2 Outdoor unit network communication 2 error
error
E
1 4. 5 The number of indoor unit shortage
E
2 2. 1 Indoor unit capacity error
E
2 4. 2 Connection unit number error (Indoor unit)
Function setting
E
2 6. 1 Indoor unit duplicate address error
error
E
2 8. 1 Auto address setting error
E
2 8. 4 Signal amplifier auto address error
Indoor unit
E
5 U. 1 Indoor unit miscellaneous error
actuator error
E
6 2. 3 Outdoor unit EEPROM access error
E
6 2. 6 Outdoor unit inverters communication error
E
6 2. 8 Outdoor unit EEPROM data corruption error
Outdoor unit
E
6 3. 1 Outdoor unit inverter error
PCB/Electrical
Outdoor unit inverter PCB power short interruption
E
6 7. 2
component/
error
Switch error
Outdoor unit rush current limiting resister temp. rise error
E
6 8. 2
(protective operation)
Outdoor unit transmission PCB parallel communica-
E
6 9. 1
tion error
E
7 1. 1 Outdoor unit discharge temp. thermistor 1 error
E
7 2. 1 Outdoor unit compressor temp. thermistor 1 error
E
7 3. 3 Outdoor unit heat ex. liquid temp. thermistor error
E
7 4. 1 Outside air temp. thermistor error
Outdoor unit
E
7 5. 1 Outdoor unit suction gas temp. thermistor error
sensor error
E
7 7. 1 Outdoor unit heat sink temp. thermistor error
Outdoor unit current sensor 1 error
E
8 4. 1
(permanent stop)
E
8 6. 1 Outdoor unit discharge pressure sensor error
E
8 6. 3 Outdoor unit suction pressure sensor error
E
9 3. 1 Outdoor unit inverter compressor start up error
E
9 4. 1 Outdoor unit trip detection
E
9 5. 5 Outdoor unit compressor motor loss of synchronization
Outdoor unit
E
9 7. 1 Outdoor unit fan motor 1 lock error
actuator error
E
9 7. 4 Outdoor unit fan motor 1 undervoltage error
Outdoor unit fan motor 1 temperature error
E
9 7. 5
(protective action)
E
9 A. 1 Outdoor unit coil 1 (expansion valve 1) error
Outdoor unit discharge temperature 1 error (permanent
E
A 1. 1
stop)
Refrigerant
E
A 3. 1 Outdoor unit compressor 1 temperature error
system error
E
A 4. 1 Outdoor unit high pressure error
E
A 5. 1 Outdoor unit low pressure error
E
A C. 4 Outdoor unit heat sink temperature error
7 segment LED indicator:
A:
C:
E:
F:
H:
J:
L:
, ,
,
,
,
,
,
1:
2:
3:
4:
5:
6:
7:
,
,
,
,
,
,
Description
Description
S:
P:
U:
d:
n:
o:
r:
,
,
,
,
,
,
,
8:
9:
0:
,
,
,
t:
,
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