En-18
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.
Settings for starting test run
operation
Settings for stopping test run
operation
Press the “ENTER” button for
more than 3 seconds.
Press the “ENTER” button for more than 3 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
when the cooling test
operation is complete.
This will be displayed
when the heating test
operation is complete.
This will be displayed after 5 seconds.
This will be displayed after 5 seconds.
First 2 digits Last 2 digits
Set to Function mode [F3].
(When [F4] to [F9] are displayed, continue to press
the “SELECT” button until [F3] is displayed.)
For heating operation, press the “SELECT”
button until “01” is displayed.
Function settings
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
Check method
Criteria
1
High and low pressure values
are normal.
Check it with a pres-
sure gauge.
Cooling: low pressure ap-
prox. 116 psi (0.8 MPa)
Heating: high pressure ap-
prox. 435 psi (3.0 MPa)
2
Drain water is discharged
smoothly through the drain
hose.
Check it by pouring
water.
―
3
Indoor and outdoor unit fans
are operating.
Check them visually.
―
4
Compressor operates after
the indoor unit operates.
Check the operating
sound.
―
5
Difference between inlet and
outlet temperatures is normal.
Measure the inlet and
outlet temperatures.
Temperature difference 18
degrees F (10 degrees C)
6
Error is not displayed.
Check the 7-segment
display.
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
DESCRIPTION
Operation
C
L
Cooling
H
t
Heating
o
r During oil recovery operation
d
F During defrosting operation
P
C During power saving operation
L
n During low noise operation
10.2. Error codes
Mode
CODE
DESCRIPTION
Communication
error
E
1
4.
2 Outdoor unit network communication 2 error
E
1
4.
5 The number of indoor unit shortage
Function setting
error
E
2
2.
1 Indoor unit capacity error
E
2
4.
2 Connection unit number error (Indoor unit)
E
2
6.
1 Indoor unit duplicate address error
E
2
8.
1 Auto address setting error
E
2
8.
4 Signal amplifier auto address error
Indoor unit
actuator error
E
5
U.
1 Indoor unit miscellaneous error
Outdoor unit
PCB/Electrical
component/
Switch error
E
6
1.
5 Outdoor unit reverse/missing phase & wiring 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
E
6
3.
1 Outdoor unit inverter error
E
6
7.
2
Outdoor unit inverter PCB power short interruption
error
E
6
8.
2
Outdoor unit rush current limiting resister temp. rise
error (protective operation)
E
6
9.
1
Outdoor unit transmission PCB parallel communica-
tion error
Outdoor unit
sensor 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
E
7
5.
1 Outdoor unit suction gas temp. thermistor error
E
7
7.
1 Outdoor unit heat sink temp. thermistor error
E
8
2.
1
Outdoor unit sub-cool heat ex. gas inlet temp.
thermistor error
E
8
2.
2
Outdoor unit sub-cool heat ex. gas outlet temp.
thermistor error
E
8
3.
2 Outdoor unit liquid pipe temp. thermistor 2 error
E
8
4.
1
Outdoor unit current sensor 1 error
(permanent stop)
E
8
6.
1 Outdoor unit discharge pressure sensor error
E
8
6.
3 Outdoor unit suction pressure sensor error
E
8
6.
4 Outdoor unit high pressure switch 1 error
Outdoor unit
actuator 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 synchroniza-
tion
E
9
7.
1 Outdoor unit fan motor 1 lock error
E
9
7.
4 Outdoor unit fan motor undervoltage error
E
9
7.
5
Outdoor unit fan motor 1 temperature error
(protective action)
E
9
7.
9 Outdoor unit fan motor 1 driver error.
E
9
8.
1 Outdoor unit fan motor 2 lock error
E
9
8.
5
Outdoor unit fan motor 2 temperature error
(protective action)
E
9
8.
9 Outdoor unit fan motor 2 driver error.
E
9
A.
1 Outdoor unit coil 1 (expansion valve 1) error
E
9
A.
2 Outdoor unit coil 2 (expansion valve 2) error
Refrigerant
system error
E
A
1.
1
Outdoor unit discharge temperature 1 error (perma-
nent stop)
E
A
3.
1 Outdoor unit compressor 1 temperature error
E
A
4.
1 Outdoor unit high pressure error
E
A
4.
2 Outdoor unit high pressure protective action 1
E
A
5.
1 Outdoor unit low pressure error
E
A
C.
4 Outdoor unit heat sink temperature error
,,
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,
,
,
,
,
,
,
,
t:
L:
7:
H:
J:
6:
A:
C:
E:
F:
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d:
n:
o:
r:
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,
,
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9:
P:
U:
S:
8:
,
,
,
,
5:
3:
4:
1:
2:
,
0:
7-segment LED indicator:
9380545309-02.indb 18
9380545309-02.indb 18
2018/12/27 8:39:07
2018/12/27 8:39:07
