6. Diagnostic code and trouble shooting
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6.1.1.
Diagnostic code for outdoor unit
-
95
-
PRODUCT DIAGNOSIS PROCEDURE
Malfunction
Code
Diagnosis
Malfunction
Code
Diagnosis
IPM overcurrent or short circuit
21
Module overcurrent /
20
23
18
Malfunction of module temp.sensor
Module operated overload
Module low or high DC voltage (under 192V or above 375V)
Communication failure between Module and ECU
Communication cables broken or not well connected.
Module current detect circuit malfunction
MCU reset
Discharging temperature overheating.Lack of refrigerant,
ambient temperature too high or PMVs blocked.
17
4-way valve switching failure
Malfunction of gas pipe temp. sensor for indoor unit A
Malfunction of gas pipe temp. sensor for indoor unit B
Malfunction of gas pipe temp. sensor for indoor unit C
Malfunction of gas pipe temp. sensor for indoor unit D
Malfunction of gas pipe temp. sensor for indoor unit E
Malfunction of liquid pipe temp. sensor for indoor unit A
Malfunction of liquid pipe temp. sensor for indoor unit B
Malfunction of liquid pipe temp. sensor for indoor unit C
Malfunction of liquid pipe temp. sensor for indoor unit D
Malfunction of liquid pipe temp. sensor for indoor unit E
9
10
11
12
13
15
1
2
4
5
6
Malfunction of defrosting temp. sensor
Malfunction of compressor suction temp. sensor
Malfunction of condensing temp. sensor
Malfunction of ambient temp. sensor
Malfunction of compressor discharge temp. sensor
Malfunction of piping temp. sensor
System low pressure switch of
f
System low pressure protection.Refrigerant shortage,
Low defrosting temp., or malfunction of fan motor
.
Faulty of outdoor unit EEPROM
Communication failure between indoor&outdoor unit
Compressor overcurrent
Input overcurrent
Malfunction of the DC fan motor
0150504996
Precautions
For Adding Refrigerant
1.This system must use refrigerant R410A.
2.Add refrigerant 20g per meter when the
total piping length exceeds the standard
value,but make sure that the total liquid
piping length should be less than the
max value.
Outdoor Unit
Std. V
alue
Max V
alue
3U19FS1ERA
4U30HS1ERA
4U25HS1ERA
30
50
40
70
System high pressure switch of
f
8
System high pressure protection.Refrigerant
overabundance,High condensing temp. or
malfunction of fan motor
.
Notes:
1.When using this product,you need not to
set the address.But the L/N wires
between indoor & outdoor units must be
corresponded,or there will be
communication failure.
2.Quiet Operation Setting.Set the DIP
”8”
to ON position of SW5,the system will
run with lower noise,but the max
capacity will also reduce slightly
.
3.Do NOT
change the settings of other
switchs,wrong settings can make the
system damage or other malfunctions.
4.For some malfunctions, this system can
make back up running.
* ECU:Electronic Control Unit
MCU:Micro Control Unit
PMV
:Pulse Modulated V
alve
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
ON
OFF
1
2
3
4
Definition
State when out of factory (Normal Operating)
Compulsive Heating:Frequenc
y 50HZ; PMV
200 pulse;Class 5 of outdoor fan motor
.
Rated Operating
Compulsive Cooling:Frequenc
y 60HZ; PMV
200 pulse;Class 7 of outdoor fan motor
.
Definition of SW1 on Malfunction Display
Module temperature too high (Overload Protecter)
24
25
26
27
28
29
Module switch failure
30
31
32
33
34
35
36
39
40
Indoor overload
Indoor frosted
41
42
43
44
45
46
70
40
5U34HS1ERA
80
40
38
Malfunction of module temp.sensor
D
ia
g
n
o
s
is
d
is
p
la
y
o
n
D
ig
ita
l L
E
D
Note:
1
.
T
h
e
number of o
u
tdoor u
n
it diagn
o
sis
= th
e numb
e
r o
f in
doo
r
unit d
ia
g
n
o
sis
-2
0
2
.
If indo
or u
nit use remoter controller
,
the d
ia
g
no
sis dis
pla
y
on th
e timing light a
nd
o
peration
lig
h
t.
(T
he
flash
ti
me
s of
timing light rep
res
ent t
en d
igit
s
of diag
n
o
sis; the
flash
times
of
o
peration
lig
ht repres
en
t singl
e
dig
its
)
3
. If ind
oor
un
it
use w
ire co
n
tro
lle
r, the
diag
n
o
sis is he
x
, if
you w
a
nt to
fin
d out
the me
anin
g
o
f the
di
agn
o
sis, y
o
u ne
ed
to cha
n
ge
the
hex
i
n
to
d
e
ci
m
a
l sy
stem
.
