14.4 Error Codes
With the exception of a mode conflict error, contact your supplier or service engineer if any of the error codes listed in the following table are
displayed on the unit's display panel. If the mode conflict error is displayed and persists, contact your supplier or service engineer. These errors
should only be investigated by a professional technician. The descriptions are provided in this manual for reference only.
Content
Digital display output
Possible causes
Fan error
EEPROM error
Damaged main PCB.
Line loosened or broken.
The electronic expansion valve in stuck.
Outdoor unit error.
Water level error
Water level float stuck.
Water level switch not connected properly.
Damaged main PCB.
Drain pump has malfunctioned.
Indoor unit has not been assigned an address.
Damaged main PCB.
Notes:
Flashing rapidly means flashing twice per second; flashing slowly means flashing once per second.
21
Mode conflict error
T1 Indoor ambient temperature
sensor error
T2 Indoor heat exchanger
mid-point temperature sensor error
T2B Indoor heat exchanger outlet
temperature sensor error
Communication error between
indoor and outdoor units
Refrigerant leakage failure
A1
Indoor unit has not been
assigned an address
The indoor unit’s operating mode conflicts with that of the outdoor units.
E0
E1
E2
E3
E4
Temperature sensor not connected properly or has malfunctioned.
Damaged main PCB.
E6
E7
Indoor EEV coil error
Eb
Outdoor unit error
Ed
MS box PCB malfunction.
Emergency stop
A0
MS self-check failure
U4
MS failure
F8
IDU address repeat.
Error code display F7
and repeated address
by turns in 1 Hz
F7
E9
There are other indoor units that repeat the address.
Line loosened or broken.
Damaged main PCB.
EE
FE
Communication error between
indoor unit and adapter board
or panel
H4
Damaged main PCB.
EEPROM error(adapter board
or panel)
H5
Damaged main PCB.
HA
Smart Eye error
Damaged main PCB.
Communication
wires
between
indoor
and
outdoor
units are
not connected
properly.
Interference
from
high
voltage
wires
or
other
sources
of
electromagnetic
radiation.
Communication
wire
too
long.
Damaged
main
PCB.
Fan
stuck
or
blocked.
Fan
motor
not
connected properly or
has
malfunctioned.
Power
supply
abnormal.
Damaged
main
PCB.
MS box actually detects that the quantity of connected refrigerant leak
sensors does not match the quantity of sensors set by ENC1.
The refrigerant leak sensor is open circuit, that means that there is
a refrigerant leak.
The indoor unit receives the emergency stop signal sent by the outdoor
unit or centralized control.
During the commissioning of the outdoor unit, the outdoor unit
found the indoor unit PQE connection under the MS, but the actual
refrigerant pipe connection did not match.
The connected MS box has an error or protection.
Multiple virtual addresses will appear in 20-56kw high pressure ducts.
And it didn't repower after setting the unit's capacity.
Failure in communication
with the wired control
