Haier HBU-42CH03 Operation & Installation Manual page 14

When Trouble Happens
Failure code list
Failure code Power lamp flash
on wired times/LED on
controller PCB flash times
E0
E1
E2
E3
E4
E5
E6
E8
E9
E7
failure description
10 Fault in drain system Float switch is open
Indoor ambient
1
temp. sensor failure
Indoor pipe
2
temp. sensor failure
Outdoor ambient
3
temp. sensor failure
Outdoor pipe or
d i s c h a rg e t e m p .
4
sensor failure
5 overcurrent
High pressure
6
malfunction
Low pressure
16
malfunction
C o m m u n i c a t i o n
f a i l u r e b e t w e e n
8
indoor PCB and panel
or wired controller
C o m m u n i c a t i o n
f a i l u r e b e t w e e n
9
indoor and outdoor
unit
Temperature cutoff
13
protection
Sensor broken down or short circuit for
more than 2m continuously
Sensor broken down or short circuit for more
than 2m continuously
Sensor broken down or short circuit for more
than 2m continuously
Sensor broken down or short circuit for more
than 2m continuously or outdoor discharge
temp. over 120
30m
Indicate phase failure when been electrified
for the first time, indicate overcurrent
protection during working procedure
Outdoor high pressure switch acts
Outdoor low pressure switch acts or the
proctector on the top of compressor breaks
for protection
Communication abnormal for more than 4m
continuously
Communication between indoor PCB and
outdoor PCB open for more than 4m
System failure. System cooling or heating
function abnormal
12
Reasons
for 3 times continuously in