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
98
2 Temperature/Pressure List of Refrigerant
R410A
Temperature
Pressure
Temperature
Pressure
Temperature
Pressure
℃
kPa
℃
kPa
℃
kPa
-30
275
0
803
30
1880
-29
286
1
823
31
1910
-28
298
2
851
32
1960
-27
311
3
879
33
2030
-26
324
4
903
34
2080
-25
334
5
937
35
2130
-24
348
6
962
36
2180
-23
363
7
994
37
2240
-22
375
8
1020
38
2290
-21
391
9
1050
39
2350
-20
404
10
1090
40
2410
-19
424
11
1110
41
2460
-18
435
12
1150
42
2510
-17
453
13
1180
43
2580
-16
468
14
1220
44
2650
-15
483
15
1250
45
2710
-14
504
16
1280
46
2770
-13
520
17
1320
47
2840
-12
538
18
1350
48
2910
-11
556
19
1400
49
2980
-10
579
20
1440
50
3050
-9
598
21
1470
51
3100
-8
618
22
1520
52
3180
-7
639
23
1560
53
3250
-6
660
24
1600
54
3320
-5
682
25
1640
55
3400
-4
705
26
1680
56
3480
-3
728
27
1730
57
3540
-2
752
28
1780
58
3630
-1
777
29
1820
59
3720
3 Operation Tools
The following tools will be used: 1) Liquid-level gauge; 2) Screwdriver; 3) Electric driven rotary hammer; 4)
Drill; 5) Pipe expander; 6) Torque wrench; 7) Open-end wrench; 8) Pipe cutter; 9) Leak detector; 10) Vacuum
pump; 11) Pressure gauge; 12) Universal meter; 13) Hexagon wrench; 14) Tapeline.