Haier 1U71S2SG1FA Service Manual page 235

Fault possible reasons
Outdoor
LED
display
Outdoor unit(3U 4U
5U)
26 MCU reset
Module current detect
27
circuit malfunction
Malfunction of liquid
28 pipe temp. sensor for
indoor unit A
Malfunction of liquid
29 pipe temp. sensor for
indoor unit B
Malfunction of liquid
30 pipe temp. sensor for
indoor unit C
Malfunction of liquid
31 pipe temp. sensor for
indoor unit D
Malfunction of gas
32 pipe temp. sensor for
indoor unit A
Malfunction of gas
33 pipe temp. sensor for
indoor unit B
Malfunction of gas
34 pipe temp. sensor for
indoor unit C
Malfunction of gas
35 pipe temp. sensor for
indoor unit D
Malfunction of gas
36 pipe temp. sensor for
indoor unit E
"Malfunction of
module temp.sensor
38
Momentary power
failure detection"
Malfunction of
39 condensing temp.
sensor
Malfunction of liquid
40 pipe temp. sensor for
indoor unit E
System high pressure
42
switch off
System low pressure
43
switch off
System high pressure
protection.Refrigerant
overabundance,high
44
condensing temp.
or malfunction of fan
motor.
System low pressure
protection.Refrigerant
shortage,low
45
defrosting temp., or
malfunction of fan
motor.
Wired controller
Wired controller
display(Decimal-
display(Hex-
YR-E16/YR-
YR-E17)---for
E16A)---for duct/
duct/cassette
cassette
2E 46
2F 47
30 48
31 49
32 50
33 51
34 52
35 53
36 54
37 55
38 56
3A 58
3B 59
3C 60
3E 62
3F 63
40 64
41 65
Round way cassette---
indoor display outdoor
error code use the timer
and running lamp OR I.D.
Panel
PCB LED
display(Hex)--
-for round way
cassette
Running
Timer lamp
flash
time(I.D.
time(I.D.
PCBLED5)
PCBLED1)
2E 4
2F 4
30 4
31 4
32 5
33 5
34 5
35 5
36 5
37 5
38 5
3A 5
3B 5
3C 6
3E 6
3F 6
40 6
41 6
232
Compact design 4-way
cassette/Convertible
unit/Duct unit--- indoor
display outdoor error
code use the timer and
running lamp OR I.D.
PCB LED
Running
Timer lamp
lamp lamp
flash
flash flash
time(I.D.
time(I.D.
PCBLED4)
PCBLED3)
6 4 6
7 4 7
8 4 8
9 4 9
0 5 0
1 5 1
2 5 2
3 5 3
4 5 4
5 5 5
6 5 6
8 5 8
9 5 9
0 6 0
2 6 2
3 6 3
4 6 4
5 6 5
Wall
mounted
indoor
display
F9
F24
F10
F16
F17
F18
F29
F30
F31
F32
F26
F35
F36
F33
F39
F40
F41
F42