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9. 3.
Checklist
Check description
High and low pressure
1
values are normal.
Drain water is dis-
2
charged smoothly
through the drain hose.
Indoor and outdoor unit
3
fans are operating.
Compressor operates after
4
the indoor unit operates.
Difference between inlet
5
and outlet temperatures
is normal.
6
Error is not displayed
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
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 phase, missing phase wire 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
E 6 7. 2
error
E 6 8. 2
E 6 9. 1
En-25
Check method
Criteria
Cooling: low pressure ap-
Check it with a
prox. 0.8 MPa
pressure gauge.
Heating: high pressure ap-
prox. 3.0 MPa
Check it by pour-
―
ing water.
Check them visu-
―
ally.
Check the operat-
―
ing sound.
Measure the inlet
Temperature difference 10
and outlet temper-
degrees
atures.
Check the 7
Error blinking or no error
segment LED
code display
indicator
Description
Description
Outdoor unit inverter PCB power short interruption
error
Outdoor unit rush current limiting resister temp. rise
error (protective operation)
Outdoor unit transmission PCB parallel
communication error
E 7 1. 1 Outdoor unit discharge thermistor 1 error
E 7 2. 1 Outdoor unit compressor temp sensor 1 error
E 7 3. 4 Outdoor unit heat ex. 1 gas temp. sensor error
E 7 3. 5 Outdoor unit heat ex. 1 liquid temp. sensor error
E 7 3. 6 Outdoor unit heat ex. 2 gas temp. sensor error
E 7 3. 7 Outdoor unit heat ex. 2 liquid temp. sensor error
E 7 4. 1 Outside air thermistor error
E 7 5. 1 Outdoor unit suction gas thermistor error
Outdoor unit sensor
error
E 7 7. 1 Outdoor unit heat sink thermistor error
E 8 2. 2
E 8 3. 1 Outdoor unit liquid pipe thermistor 1 error
E 8 3. 2 Outdoor unit liquid pipe 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 lock error
E 9 7. 5
Outdoor unit actuator
error
E 9 7. 9 Outdoor unit fan motor driver abnormal
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
E A 1. 1 Outdoor unit discharge temperature 1 abnormal
E A 3. 1 Outdoor unit compressor 1 temperature abnormal
E A 4. 1 Outdoor unit high pressure abnormal
E A 4. 2 Outdoor unit high pressure protection 1
Refrigerant system error
E A 5. 1 Outdoor unit low pressure abnormal
E A 6. 3 Outdoor heat exchanger 1 gas temperature abnormal
E A 6. 4 Outdoor heat exchanger 2 gas temperature abnormal
E A C. 4 Outdoor unit heat sink temperature abnormal
7 segment LED indicator:
11.
INFORMATION
Main contents of label
Item
1.
Model name
2.
Serial number
3.
Electric characteristics
4.
Weight
5.
Capacity
6.
Current
7.
Input power
8.
Max. Current
9.
Air circulation
10.
Noise level
Outdoor unit sub-cool heat ex. gas outlet thermistor
error
Outdoor unit fan motor temperature error (protective
action)
Detail
Model name
Serial number
Phase, rated voltage, and frequency
Product weight
Cooling/heating capacity under cooling/
heating condition (refer to item 15)
Electric current during cooling/heating
operation under cooling/heating condi-
tion
(refer to item 15)
Input during cooling/heating operation
under cooling/heating condition (refer
to item 15)
Maximum electric current (temperature
condition is max. cooling condition [refer
to item 16])
Air circulation
Noise level
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