Haier AB25S2SC1FA, Service Manual

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138
3U52S2SG1FA 3U68S2SG1FA 4U70S2SH1FA 4U85S2SH1FA
PRODUCT DIAGNOSIS PROCEDURE
Malfunction Code
Diagnosis
Malfunction Code
Diagnosis
IPM overcurrent or short circuit
21
20 23
18
Module operated overload Module low or high voltage Communication failure between Module and ECU
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 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
‘
Toci
’
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 start failure
Module input overcurrent
Malfunction of the DC fan motor
Diagnosis using the Numeral Light Indicator
0150520847
Precautions
For Adding Refrigerant
1.This system must use refrigerant R32. 2.Add refrigerant 20g/meter in outdoor units 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.
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
”3”
to ON position of SW7,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 thermal overload
24
25 26 27 28
29
Loss of synchronism detection
30
31 32
34
35
36
39 40
2014.5.19 增加新模块机型
Indoor thermal overload Indoor frosted
41 42 43 44
45
38
Malfunction of module temp.sensor Momentary power failure detection
Malfunction of gas pipe temp. sensor for indoor unit B
33
16
La
ck
of
re
fri
ge
ra
nt
o
r d
is
ch
ar
gi
ng
Outdoor Unit
Std. V
alue
Max. V
alue
3U68S2SG1F
A
3U52S2SG1F
A
30m
50m
30m
60m
4U85S2SH1F
A
70m
40m
4U70S2SH1F
A
40m
70m
ON
OFF
OFF
OFF
Time Defrost V
alid
ON
ON
ON
ON
Detection for W
rong Wiring