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15.4 Error codes
With the exception of a mode conflict error, contact your supplier or service engineer if any of the error codes listed in Table 7-3 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
M
o
d
e
c
o
n
l f
t c i
Communication error
between indoor and
outdoor units
Indoor ambient
temperature sensor
(T1) error
Indoor heat
exchanger mid-point
temperature sensor
(T2) error
Indoor heat
exchanger outlet
temperature sensor
(T2B) error
F
a
n
e
r r
r o
E
E
P
R
O
M
error
Indoor EEV coil error
O
u
d t
o
r o
u
n
t i
e
r r
r o
W
t a
r e
e l
v
l e
e
r r
r o
The indoor unit has
not been assigned
an address
Possible causes
Digital display output
The indoor unit's operating mode conflicts with that of the outdoor
E
0
units.
Communication wires between indoor and outdoor units not
connected properly.
Interference from high voltage wires or other sources of
E1
electromagnetic radiation.
Communication wire too long.
Damaged main PCB.
E2
E3
Temperature sensor not connected properly or has malfunctioned.
Damaged main PCB.
E4
Fan stuck or blocked.
Fan motor not connected properlyor has malfunctioned.
E
6
Power supply abnormal.
Damaged main PCB.
Damaged main PCB.
E
7
Line loosened or broken.
The electronic expansion valve in stuck.
E
b
Damaged main PCB.
E
d
Outdoor unit error.
Water level float stuck.
Water level switch not connected properly.
E
E
Damaged main PCB.
Drain pump has malfunctioned.
FE
Indoor unit has not been assigned an address.
21
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