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After the test operation is complete, turn off the power. Attach the cover of the electrical
compartment box and the front panel of the outdoor unit.
NOTE:
• 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 or
DIP switch for the number of connected slave units are not confi gured correctly.
• The system will not operate normally with an incorrect DIP switch setting.
Stop the system immediately and recheck the DIP switch setting.
9. 3.
Checklist
Check description
Check method
High and low pressure
Check it with a
1
values are normal.
pressure gauge.
Drain water is dis-
Check it by pour-
2
charged smoothly
ing water.
through the drain hose.
Indoor and outdoor unit
Check them visu-
3
fans are operating.
ally.
Compressor operates after
Check the operat-
4
the indoor unit operates.
ing sound.
Difference between inlet
Measure the inlet
5
and outlet temperatures
and outlet temper-
is normal.
atures.
Check the 7
6
Error is not displayed
segment LED
indicator
10. LED STATUS
You can determine the operating status by the lighting up and blinking of the 7 seg-
ment LED indicator.
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 peak cut operation
L
n During low noise operation
S n During setting of snowfall mode
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
Description
10. 2. Error codes
Mode
Code
E 1 3. 1 Communication error between outdoor units
E 1 4. 1 Outdoor unit network communication 1 error
Communication error
E 1 4. 2 Outdoor unit network communication 2 error
E 1 4. 5 The number of indoor unit shortage
E 2 8. 1 Auto address setting error
Function setting error
E 2 8. 4 Signal amplifi er auto address error
Indoor unit actuator error E 5 U. 1 Indoor unit miscellaneous 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
Outdoor unit PCB/elec-
E 6 3. 1 Outdoor unit inverter error
trical component/switch
Outdoor unit inverter PCB power short interruption
E 6 7. 2
error
error
Outdoor unit rush current limiting resister temp. rise
E 6 8. 2
error (protective operation)
Outdoor unit transmission PCB parallel
E 6 9. 1
communication 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. 4 Outdoor unit heat ex. 1 gas temp. thermistor error
E 7 3. 5 Outdoor unit heat ex. 1 liquid temp. thermistor error
E 7 3. 6 Outdoor unit heat ex. 2 gas temp. thermistor error
E 7 3. 7 Outdoor unit heat ex. 2 liquid temp. thermistor error
E 7 4. 1 Outside air temp. thermistor error
E 7 5. 1 Outdoor unit suction gas temp. thermistor error
Outdoor unit sensor
E 7 7. 1 Outdoor unit heat sink temp. thermistor error
error
Outdoor unit sub-cool heat ex. gas outlet temp.
E 8 2. 2
thermistor error
E 8 3. 1 Outdoor unit liquid pipe temp. thermistor 1 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
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
E 9 7. 1 Outdoor unit fan motor 1 lock error
Outdoor unit fan motor 1 temperature error (protective
E 9 7. 5
Outdoor unit actuator
action)
error
E 9 7. 9 Outdoor unit fan motor 1 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
E 9 A. 3 Outdoor unit coil 3 (expansion valve 3) error
E 9 U. 2 Outdoor slave unit error
Outdoor unit discharge temperature 1 error (perma-
E A 1. 1
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
Refrigerant system error
E A 5. 1 Outdoor unit low pressure error
E A 6. 3 Outdoor unit heat exchanger 1 gas temperature error
E A 6. 4 Outdoor unit heat exchanger 2 gas temperature 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
d:
n:
o:
r:
S:
P:
U:
,
,
,
,
,
,
,
8:
9:
0:
,
,
,
En-26
t:
,
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