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
96
Temperature (℃)
Resistance (kΩ)
Voltage (V)
Temperature (℃)
Resistance (kΩ)
Voltage (V)
-15
362.99
0.088
76
6.9882
1.943
-14
342.83
0.094
77
6.7608
1.969
-13
323.94
0.099
78
6.542
1.995
-12
306.23
0.104
79
6.3315
2.021
-11
289.61
0.11
80
6.1288
2.046
-10
274.02
0.116
81
5.9336
2.071
-9
259.37
0.123
82
5.7457
2.096
-8
245.61
0.129
83
5.5647
2.12
-7
232.67
0.136
84
5.3903
2.144
-6
220.5
0.143
85
5.2223
2.168
-5
209.05
0.151
86
5.0605
2.191
-4
195.97
0.158
87
4.9044
2.214
-3
188.12
0.167
88
4.7541
2.237
-2
178.65
0.175
89
4.6091
2.259
-1
169.68
0.184
90
4.4693
2.281
0
161.02
0.193
91
4.3345
2.302
1
153
0.202
92
4.2044
2.323
2
145.42
0.212
93
4.0789
2.344
3
135.96
0.223
94
3.9579
2.364
4
131.5
0.233
95
3.841
2.384
5
126.17
0.242
96
3.7283
2.404
6
119.08
0.256
97
3.6194
2.423
7
113.37
0.267
98
3.5143
2.442
8
107.96
0.28
99
3.4128
2.46
9
102.85
0.292
100
3.3147
2.478
10
98.006
0.306
101
3.22
2.496
11
93.42
0.319
102
3.1285
2.514
12
89.075
0.333
103
3.0401
2.531
13
84.956
0.348
104
2.9547
2.547
14
81.052
0.362
105
2.8721
2.564
15
77.349
0.378
106
2.7922
2.58
16
73.896
0.393
107
2.715
2.595
17
70.503
0.41
108
2.6404
2.611
18
67.338
0.427
109
2.5682
2.626
19
64.333
0.444
110
2.4983
2.64
20
61.478
0.462
111
2.4308
2.655
21
58.766
0.48
112
2.3654
2.669
22
56.189
0.499
113
2.3021
2.682
23
53.738
0.518
114
2.2409
2.696
24
51.408
0.537
115
2.1816
2.709
25
49.191
0.558
116
2.1242
2.722
26
47.082
0.578
117
2.0686
2.734
27
45.074
0.599
118
2.0148
2.747
28
43.163
0.621
119
1.9626
2.759