Meaning
Solutions
Error Code
Communication failure between
indoor unit and outdoor unit.
E1
Check the communication cables; make sure they are firmly
connected. If the cables are broken, replace them.
Indoor Temp Sensor Open/short.
E2
Check the plug is firmly connected. If the sensor is broken,
replace it.
Indoor Coil Sensor Open/short
E3
Check the plug is firmly connected. If the sensor is broken,
replace it.
Outdoor Temp Sensor Open/Short
E4
Check the plug is firmly connected. If the sensor is broken,
replace it.
Outdoor Coil Sensor Open/Short
E6
Check the plug is firmly connected. If the sensor is broken,
replace it.
EEPROM Error
E7
Check the EEPROM chip on the main board is firmly plugged.
If still not solved, replace the main board.
Communication failure between
main board and 12V controller
E9
Check the communication plug, make sure the wire
connections are OK.
Compressor Fail
Starting/DC-Inverter Fail
Ed
1. Check the DIP switch SW2 on the main board (3-position,
in red color) is correctly matched with the unit capacity, refer to
the wiring diagram.Make sure the compressor power cord is
firmly and correctly connected.
DC Over/Under Voltage Protection
P1
Make sure the power supply is within the requirement
(AC208/230V -10%+10%)
IPM Over Heat Or Over Current
Protection
P3
1. Ensure that the indoor and outdoor air outlets are not blocked
.
2. Check the DIP switch SW2 on the main board (3-position,
in red color) is correctly match with the unit capacity, refer to
the wiring diagram.
3. Make sure the compressor power cord is firmly and correctly
connected.
Compressor Discharge Over Heat
Protection
P4
1. Make sure indoor and outdoor unit vents are not blocked.
2. Check the DIP switch SW2 on the main board (3-position,
in red color)is correctly match with the unit capacity, refer to
the wiring diagram.
Cooling/Heat Pump Over Load,
Outdoor/Indoor Coil Over Heat
P5
Ensure that the indoor and outdoor air outlets are not blocked
.
Check if the indoor filter, indoor coil or outdoor coil need cleaning.
IPM(DC-INVERTER) Protection
(Include Heat sink Over Heat)
P6
1. Check the wiring of compressor to the IPM (U/V/W) terminals
is correctly connected. Wrong phase connection is not allowed.
2. Remove obstacles in the air path that resists heat interchange.
Error code and solutions
(error codes illuminated in display)
NORMAL OPERATING SOUNDS AND CONDITIONS
Water trickling sounds
Water is picked up and distributed over the coil.
This improves the efficiency and helps with water
removal.
Water dripping
Water will collect in the base pan during high
humidity days . This can cause overflow and drip
from the outside of the unit.
Air sounds
The fan cycle switch sets the operational mode
of the fan . In the ON position the fan will run
continuously whenever power is applied in this
mode . In the AUTO position, the fan will cycle
on and off with the compressor or electric heater.
Starting delay
You
may
notice
a
few
minutes
delay
in
the
starting
if
you
try
to
restart
the
unit
too
soon
after
turning
it
off
or
if
you
adjust
the
thermostat
right
after
the
compressor
has
shut
off
.
This
is
due
to
a
built–
in
delay
to
protect
the
compressor
.
Buzzer Response
The
buzzer
will
chime
Di”(0.1
sec)as
response
when
receiving
the
effective
order
from
key
pad
control
and
remote
control
.
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