En-21
10. LED STATUS
You can determine the operating status by the lighting up and blinking of the LED dis-
play.
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 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
E22.1Indoor 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 amplifi er auto address error
Indoor unit
actuator error
E 5 U. 1 Indoor unit miscellaneous error
Outdoor unit
PCB/Electrical
component/
Switch 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
E67.2
Outdoor unit inverter PCB power short interrup-
tion error
E68.2
Outdoor unit rush current limiting resister temp.
rise error (protective operation)
E69.1
Outdoor unit transmission PCB parallel com-
munication error
Outdoor unit
sensor error
E 7 1. 1 Outdoor unit discharge temp. thermistor 1 error
E72.1
Outdoor unit compressor temp. thermistor 1 error
E73.3
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
E84.1
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
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 synchro-
nization
E 9 7. 1 Outdoor unit fan motor 1 lock error
E 9 7. 4 Outdoor unit fan motor 1 undervoltage error
E97.5
Outdoor unit fan motor 1 temperature error
(protective action)
E 9 A. 1 Outdoor unit coil 1 (expansion valve 1) error
Refrigerant
system error
EA1.1
Outdoor unit discharge temperature 1 error
(permanent stop)
EA3.1
Outdoor unit compressor 1 temperature 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
LED lamp :
,,, ,,,
,
,
L:H: J:
,
6:
,,
,
n: o
:
r: t:
,
,,
,
U:
,
9:8:
,,,
,
P
:
d:S:
A:
F:
C: E:
0:
5:
,,
,
,,
3:1: 2:
,
7:
4:
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
approx. 0.8 MPa
Heating: high pressure
approx.
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
Diff erence between inlet and
outlet temperatures is normal.
Measure the inlet and
outlet temperatures.
Tempe r a t ur e diff erence
10 degrees
6 Error is not displayed
Check the 7 segment
display
Error blinking or no error
code display
9380545149-02_IM_EN.indd 219380545149-02_IM_EN.indd 21 9/7/2021 1:38:55 PM9/7/2021 1:38:55 PM
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