Use and Care Manual
Table Of Contents
- Foreword
- Safety Notice
- CONTENTS
- Safety Notice on Maintenance
- Safety Notice on Operation
- 1 Product Introduction
- NOTE: 1 Ton =12000Btu/h = 3.517kW 1.2 Electrical Parameters
- 2 Control
- 3 Troubleshooting
- 3.1 Wiring Diagrams
- 3.2 PCB Layout
- 3.3 Error Code
- 3.4 Troubleshooting
- 3.4.1 “E1” Compressor High Pressure Protection
- 3.4.2 “E3” Compressor Low-pressure Protection, Refrigerant Shortage Protection, Refrigerant Recovery Mode
- 3.4.3 “E4” Compressor Air Discharge High-temperature Protection
- 3.4.4 “F2” Condenser Temperature Sensor Error
- 3.4.5 “F3” Outdoor Ambient Temperature Sensor Error
- 3.4.6 “F4” Discharge Temperature Sensor Error
- 3.4.7 “F6” ODU Tube Temperature Sensor Error
- 3.4.8“EE” ODU Memory Chip Error
- 3.4.9 “H4” Overload
- 3.4.10 “H5” IPM Protection
- 3.4.11 “H6” DC Fan Error
- 3.4.12 “H7” Driver Out-of-Step Protection
- 3.4.13 “HC” PFC Protection
- 3.4.14 “Lc” Startup Failure
- 3.4.15 “P0” Driver Reset Protection
- 3.4.16 “P5” Over-Current Protection
- 3.4.17 “P6” Master Control and Driver Communication Error
- 3.4.18 “P7” Driver Module Sensor Error
- 3.4.19 “P8” Driver Module High Temperature Protection
- 3.4.20 “PA” AC Current Protection
- 3.4.21 “Pc” Driver Current Error
- 3.4.22 “PL” Bus Low-Voltage Protection
- 3.4.23 “PH” Bus High-Voltage Protection
- 3.4.24 “PU” Charge Loop Error
- 3.4.25 “ee” Drive Memory Chip Error
- 3.5 Failures Not Caused by Errors
- 4 Maintenance
- Appendices
- 1 Resistance/Temperature Lists of Temperature Sensors
- 1.1 Voltage List of 15 KΩ Temperature Sensors (including ODU temperature sensors)
- 1.2 Voltage List of 20 KΩ Pipeline Temperature Sensors (including temperature sensors for defroster, IDU and ODU pipes)
- 1.3 Voltage List of 50 KΩ Discharge Temperature Sensors (including discharge air temperature sensor)
- 2 Temperature/Pressure List of Refrigerant
- 3 Operation Tools
MRCOOL DC INVERTER COOLING ONLY CONDENSING UNIT
91
Appendices
1 Resistance/Temperature Lists of Temperature Sensors
1.1 Voltage List of 15 KΩ Temperature Sensors (including ODU
temperature sensors)
Temperature (℃)
Resistance (kΩ)
Voltage (V)
Temperature (℃)
Resistance (kΩ)
Voltage (V)
-20
144
0.311
71
2.523
2.825
-19
138.1
0.323
72
2.439
2.838
-18
128.6
0.345
73
2.358
2.852
-17
121.6
0.362
74
2.28
2.865
-16
115
0.381
75
2.205
2.877
-15
108.7
0.4
76
2.133
2.889
-14
102.9
0.42
77
2.064
2.901
-13
97.4
0.44
78
1.997
2.912
-12
92.22
0.462
79
1.933
2.923
-11
87.35
0.484
80
1.871
2.934
-10
82.75
0.506
81
1.811
2.945
-9
78.43
0.53
82
1.754
2.955
-8
74.35
0.554
83
1.699
2.964
-7
70.5
0.579
84
1.645
2.974
-6
66.88
0.605
85
1.594
2.983
-5
63.46
0.631
86
1.544
2.992
-4
60.23
0.658
87
1.497
3.001
-3
57.18
0.686
88
1.451
3.009
-2
54.31
0.714
89
1.408
3.017
-1
51.59
0.743
90
1.363
3.025
0
49.02
0.773
91
1.322
3.033
1
46.8
0.801
92
1.282
3.04
2
44.31
0.835
93
1.244
3.047
3
42.14
0.866
94
1.207
3.054
4
40.09
0.899
95
1.171
3.061
5
38.15
0.931
96
1.136
3.068
6
36.32
0.965
97
1.103
3.074
7
34.58
0.998
98
1.071
3.08
8
32.94
1.033
99
1.039
3.086
9
31.38
1.067
100
1.009
3.092
10
29.9
1.102
101
0.98
3.098
11
28.51
1.138
102
0.952
3.103
12
27.18
1.174
103
0.925
3.108
13
25.92
1.21
104
0.898
3.114
14
24.73
1.246
105
0.873
3.119