Daikin UWL040B5 - Error Codes and Troubleshooting; Comprehensive Error Code List

39
Error code
S/N Code Symptoms S/N Code Symptoms
1 0 0#-slave communication failure 32 45
Entering water temperature sensor malfunction
of evaporator
2 01...14 1# ~14# slave communication failure 33 46
Leaving water temperature sensor malfunction
of evaporator
3 16
Heat source side pump/ cooling
tower fan overload
34 47
Entering water temperature sensor malfunction
of condenser
4 17 Overload of compressor in #2 35 48 Suction temperature sensor malfunction of #1
5 18 Using side pump overload 36 49 Suction temperature sensor malfunction of #2
6 19 Lack of water ow of evaporator 37 50 Suction temperature sensor malfunction of #3
7 20 High pressure of #1 38 51 Suction temperature sensor malfunction of #4
8 21 Low pressure of #1 39 52 Low pressure sensor malfunction of #2
9 22 Lack of water ow of condenser 40 53 Low pressure sensor malfunction of #1
10 23 Reserved 41 54 Memory failure
11 24 High pressure of #2 42 55 Over-low of water temperature of condenser
12 25
Over-low of water temperature of
evaporator
43 56 Overload of compressor in #1
13 26 Reserved 44 57 Overload of compressor in #3
14 27
EWT,LWT temperature abnormal of
evaporator
45 58 Overload of compressor in #4
15 28 High pressure of #3 46 59 High pressure of #4
16 29 Superheat of #1 is too low 47 60 Low pressure of #3
17 30 Reserved 48 61 Low pressure of #4
18 31
Communication failure with master
unit
49 62 Superheat of #3 is too low
19 32 Suction temperature #1 is too high 50 63 Superheat of #4 is too low
20 33 Discharge temperature #1 is too high 51 64 Reserved
21 34 Suction temperature #2 is too high 52 65 Suction temperature #3 is too high
22 35 Discharge temperature #2 is too high 53 66 Suction temperature #4 is too high
23 36 Low pressure of #2 54 67 Discharge temperature #3 is too high
24 37 Superheat of #2 is too low 55 68 Discharge temperature #4 is too high
25 38 Refrigerant leakage in #1 56 69 Refrigerant leakage in #3
26 39 Refrigerant leakage in #2 57 70 Refrigerant leakage in #4
27 40
Discharge temperature sensor
malfunction of #1
58 71 Low pressure sensor malfunction of #3
28 41
Discharge temperature sensor
malfunction of #2
59 72 Low pressure sensor malfunction of #4
29 42
Discharge temperature sensor
malfunction of #3
60 78 Communication failure of all the slave units
30 43
Discharge temperature sensor
malfunction of #4
61 ERRO Dialing setting error
31 44
Main pipe leaving water temperature
sensor malfunction