En-24
9. 3. Checklist
Check description Check method Criteria
1
High and low pressure
values are normal.
Check it with a
pressure gauge.
Cooling: low pressure
approx. 0.8 MPa
Heating: high pressure
approx. 3.0 MPa
2
Drain water is dis-
charged smoothly
through the drain hose.
Check it by pour-
ing water.
―
3
Indoor and outdoor unit
fans are operating.
Check them visu-
ally.
―
4
Compressor operates after
the indoor unit operates.
Check the operat-
ing sound.
―
5
Difference between inlet
and outlet temperatures
is normal.
Measure the inlet
and outlet temper-
atures.
Temperature difference 10
degrees
6 Error is not displayed
Check the 7
segment LED
indicator
Error blinking or no error
code display
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 Description
Operation
CL Cooling
Ht Heating
o r During oil recovery 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 Description
Communication error
E 1 3. 1 Communication error between outdoor units
E 1 4. 1 Outdoor unit network communication 1 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 8. 1 Auto address setting error
E 2 8. 4 Signal amplifi er auto address error
Indoor unit actuator error E 5 U. 1 Indoor unit miscellaneous error
Outdoor unit PCB/Elec-
trical component/ Switch
error
E61.5Outdoor unit reverse/missing phase & wiring error
E62.3Outdoor 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
E67.2
Outdoor unit inverter PCB power short interruption
error
E68.2
Outdoor unit rush current limiting resister temp. rise
error (protective operation)
E69.1
Outdoor unit transmission PCB parallel
communication error
Outdoor unit sensor
error
E 7 1. 1 Outdoor unit discharge temp. thermistor 1 error
E 7 1. 2 Outdoor unit discharge temp. thermistor 2 error
E 7 2. 1 Outdoor unit compressor temp. thermistor 1 error
E 7 2. 2 Outdoor unit compressor temp. thermistor 2 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
E 7 7. 1 Outdoor unit heat sink temp. thermistor error
E82.2
Outdoor unit sub-cool heat ex. gas outlet temp.
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 8 6. 5 Outdoor unit high pressure switch 2 error
Outdoor unit actuator
error
E 9 3. 1 Outdoor unit inverter compressor start up error
E 9 4. 1 Outdoor unit trip detection
E95.5
Outdoor unit compressor motor loss of synchronization
E 9 7. 1 Outdoor unit fan motor 1 lock error
E97.5
Outdoor unit fan motor 1 temperature error (protective
action)
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
Refrigerant system error
EA1.1
Outdoor unit discharge temperature 1 error (perma-
nent stop)
EA2.1
Outdoor unit discharge temperature 2 error (perma-
nent stop)
EA3.1Outdoor unit compressor 1 temperature error
E A 3. 2 Outdoor unit compressor 2 temperature error
E A 4. 1 Outdoor unit high pressure error
E A 4. 2 Outdoor unit high pressure protective action 1
E A 4. 3 Outdoor unit high pressure protective action 2
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
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7 segment LED indicator:
9378945180-02_IM.indb 249378945180-02_IM.indb 24 2014/11/10 19:39:582014/11/10 19:39:58
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