Carrier Ducted air conditioner Fault Codes

Applicable to inverter air conditioner only

No.MALFUNCTION & PROTECTION DEFINELED1
OPERATION
LED2
TIMER
LED3
DEF.FAN
LED4
ALARM
DISPLAY
DIGITAL TUBE
1Indoor fan motor speed out of controlFlashing at 2.5HZFlashing at 2.5HZE8
2In-Out door unit COMM. Check ing
channel is abnormal
Flashing at 2.5HZE1
3Room TEMP. sensor checking
channel is abnormal
Flashing at 2.5HZE2
4Pipe TEMP. Sens or c hec k ing
channel is abnormal(T2)
Flashing at 2.5HZE3
5Pipe TEMP. Sens or c hec k ing
channel is abnormal(T2B)
Flashing at 2.5HZE4
6EPPROM malfunct ionFlashing at 2.5HZE7
7Water -lev el alarm malfunct ionFlashing at 2.5HZEE
8Outdoor malfunct ionFlashing at 0.5HZEd
9Indoor twins communication malfunction Flashing at 2.5HZFlashing at 2.5HZF3
10Other malfunction of twins Flashing at 2.5HZFlashing at 2.5HZF4

Applicable to fixed-frequency air conditioner only


No.MALFUNCTION& PROTECTION DEFINELED1
OPERATION
LED2
TIMER
LED3
DEF.FAN
LED4
ALARM
DISPLAY
DIGITAL TUBE
1Room temperature sensor checking channel
is abnormal
Flashing at 5HZE2
2Pipe temperature sensor checking channel
is abnormal
Flashing at 5HZE3
3Outdoor TEMP. sensor checking channel is
abnormal
Flashing at 5HZE4
4Outdoor malfunctionFlashing at 5HZFlashing at 5HZFlashing at 5HZFlashing at 5HZE6
5Pump temperature sensor malfunctionFlashing at 5HZE5
6EEPROM malfunctionFlashing at 5HZFlashing at 5HZE7
7Water-level alarm malfunctionFlashing at 5HZE8

Carrier Ducted air conditioner troubleshooting


SymptomsCausesSolution
Unit does not start Power failure.
Power switch is off.
Fuse of power switch may have burned.
Batteries of remote controller exhausted or other problem of controller.
Wait for the comeback of power.
Switch on the power.
ReplLocation:
Replace the batterises or check the
controller.
Air flowing normally but
completely can't cooling
Temperature is not set correctly.
Be in 3 minutes protection of compressor.
Set the temperature properly.
Wait.
Units start or stop frequentlyRefrigerant is too little or too much.
Air or no concretingc gas in the refrigerating circuit.
Compressor is malfunction.
Voltage is too high or too low.
System circuit is blocked.
Check leakage, and rightly recharge refrigerant.
Vacuum and recharge refrigerant.
Maintenance or change compressor.
Install manostat.
Find reasons and solution.
Low cooling effectOutdoor unit and indoor unit heat exchanger is dirty.
The air filter is dirty.
Inlet/outlet of indoor/outdoor units is blocked.
Doors and windows are open
Sunlight directly shine.
Too much heat resource.
Outdoor temp. is too high.
Leakage of refrigerant or lack of refrigerant.
Clean the heat exchanger.
Clean the air filter.
Eliminate all dirties and make air smooth.
Close doors and windows.
Make curtains in order to shelter from sunshine.
Reduce heat source.
AC cooling capacity reduces (normal).
Check leakage and rightly recharge refrigerant.
Low heating effectOutdoor temperature is lower than 7 C
Doors and windows not completely closed.
Leakage of refrigerant or lack of refrigerant.
Use heating device.
Close doors and windows.
Check leakage and rightly recharge refrigerant.
The fan speed can not be changed.Check whether the MODE indicated on the display is "AUTO"When the automatic mode is selected, the air conditioner will
automatically change the fan speed.
The fan speed can not be
changed.
Check whether the MODE indicated on the display is "DRY"When dry operation is selected, the air conditioner automatically
change the fan speed. The fan speed can be selected during
"COOL" , "FAN ONLY", and "HEAT"
The wire controller signal is
not transmitted even when
the ON/OFF button is pushed.
Check whether the signal transmitter of the wire controller is properly directed
to the infrared signal receiver of the indoor unit.
The power supply is off
The TEMP. indicator does
not come on.
Check whether the MODE indicated on the display is FAN ONLYThe temperature cannot be set during FAN mode.
The indication on the display
disappears after a lapse of
time.
Check whether the timer operation has come to an end when the TIMER OFF
is indicated on the display.
The air conditioner operation will stop up to the set time
The TIMER ON indicator
goes off after a lapse of
certain time.
Check whether the timer operation is started when the TIMER ON is indicated
on the display.
Up to the set time, the air conditioner will automatically start and the appropriate indicator will go off.
No receiving tone sounds
from the indoor unit even
when the ON/OFF button is
pressed.
Check whether the signal transmitter of the wire controller is properly directed to the infrared signal receiver of the indoor unit when the ON/OFF button is pressed.Directly transmit the signal transmitter of the wire controller to the infrared signal receiver of the indoor unit, and then repeatly push the ON/OFF button twice.