Haier 1U71S2SG1FA Service Manual page 233

3U55S2SR2FA 3U70S2SR2FA 4U75S2SR2FA 4U85S2SR2FA 5U105S2SS2FA
PRODUCT DIAGNOSIS PROCEDURE
Code
Diagnosis
1 Faulty of outdoor unit EEPROM
2
IPM overcurrent or short circuit
4 Communication failure between Module and ECU
5 Module operated overload
6 Module low or high voltage
Discharging temperature overheating.Lack of refrigerant,
8
ambient temperature too high or PMVs blocked.
9
Malfunction of the DC fan motor
10 Malfunction of defrosting temp. sensor
11 Malfunction of compressor suction temp. sensor
Malfunction of ambient temp. sensor
12
13 Malfunction of compressor discharge temp. sensor
Communication failure between indoor&outdoor unit
15
17 4-way valve switching failure
18 Loss of synchronism detection
Indoor thermal overload
20
Module thermal overload
23
Compressor start failure
24
Module input overcurrent
25
MCU reset
26
Module current detect circuit malfunction
27
Malfunction of liquid pipe temp. sensor for indoor unit A
28
Malfunction of liquid pipe temp. sensor for indoor unit B
29
Malfunction of liquid pipe temp. sensor for indoor unit C
30
Malfunction of liquid pipe temp. sensor for indoor unit D
31
Malfunction of gas pipe temp. sensor for indoor unit A
32
Malfunction of gas pipe temp. sensor for indoor unit B
33
Malfunction of gas pipe temp. sensor for indoor unit C
34
Malfunction of gas pipe temp. sensor for indoor unit D
35
Malfunction of gas pipe temp. sensor for indoor unit E
36
Momentary power failure detection
38
Malfunction of condensing temp. sensor
39
Malfunction of liquid pipe temp. sensor for indoor unit E
40
Diagnosis using the Numeral Light Indicator
Code
System high pressure switch off
42
System low pressure switch off
43
System high pressure protection.Refrigerant overabundance,
44
High condensing temp. or malfunction of fan motor.
System low pressure protection.Refrigerant shortage,
45
Low defrosting temp.,Faulty of model code. or malfunction of fan motor
Definition of SW1 on Malfunction Display
1 2
OFF OFF OFF
ON OFF OFF
OFF ON OFF
OFF OFF ON
OFF OFF
OFF
ON ON ON
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 Valve
230
Diagnosis
Definition
3 4
OFF State when out of factory
Compulsive Heating:
Frequency 50HZ; PMV 200 pulse;
OFF
Class 5 of outdoor fan motor.
Compulsive Cooling:
Frequency 60HZ; PMV 200 pulse;
OFF
Class 7 of outdoor fan motor.
OFF Rated Operating
ON Time Defrost Valid
ON Detection for Wrong Wiring
0150526300