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Table of contents
Installer and user reference guide
4
18.2.4
To route the refrigerant piping ...................................................................................................................... 82
18.2.5
To connect the refrigerant piping to the outdoor unit ................................................................................. 83
18.2.6
To connect the multi connection piping kit ................................................................................................... 84
18.2.7
To connect the refrigerant branching kit....................................................................................................... 84
18.2.8
To protect against contamination.................................................................................................................. 85
18.2.9
To braze the pipe end..................................................................................................................................... 86
18.2.10 Using the stop valve and service port............................................................................................................ 86
18.2.11 To remove the spun pipes.............................................................................................................................. 89
18.3
Checking the refrigerant piping...................................................................................................................................... 90
18.3.1
About checking the refrigerant piping ........................................................................................................... 90
18.3.2
Checking refrigerant piping: General guidelines ........................................................................................... 91
18.3.3
Checking refrigerant piping: Setup ................................................................................................................ 92
18.3.4
To perform a leak test .................................................................................................................................... 92
18.3.5
To perform vacuum drying............................................................................................................................. 93
18.3.6
To insulate the refrigerant piping .................................................................................................................. 93
18.4
Charging refrigerant........................................................................................................................................................ 94
18.4.1
Precautions when charging refrigerant ......................................................................................................... 94
18.4.2
About charging refrigerant............................................................................................................................. 95
18.4.3
To determine the additional refrigerant amount .......................................................................................... 95
18.4.4
To charge refrigerant: Flow chart .................................................................................................................. 97
18.4.5
To charge refrigerant...................................................................................................................................... 98
18.4.6
Step 6: To manually charge refrigerant ......................................................................................................... 100
18.4.7
Checks after charging refrigerant .................................................................................................................. 100
18.4.8
To fix the fluorinated greenhouse gases label............................................................................................... 101
19.1
About connecting the electrical wiring .......................................................................................................................... 102
19.1.1
Precautions when connecting the electrical wiring....................................................................................... 102
19.1.2
Field wiring: Overview .................................................................................................................................... 104
19.1.3
About the electrical wiring ............................................................................................................................. 104
19.1.4
Guidelines when knocking out knockout holes ............................................................................................. 105
19.1.5
About electrical compliance........................................................................................................................... 106
19.1.6
Safety device requirements ........................................................................................................................... 106
19.2
To route and fix the transmission wiring........................................................................................................................ 108
19.3
To connect the transmission wiring ............................................................................................................................... 108
19.4
To finish the transmission wiring.................................................................................................................................... 109
19.5
To route and fix the power supply ................................................................................................................................. 110
19.6
To connect the power supply ......................................................................................................................................... 110
19.7
To check the insulation resistance of the compressor .................................................................................................. 112
20.1
Overview: Configuration................................................................................................................................................. 113
20.2
Making field settings....................................................................................................................................................... 113
20.2.1
About making field settings............................................................................................................................ 113
20.2.2
Field setting components............................................................................................................................... 115
20.2.3
To access the field setting components......................................................................................................... 115
20.2.4
To access mode 1 or 2.................................................................................................................................... 116
20.2.5
To use mode 1 ................................................................................................................................................ 117
20.2.6
To use mode 2 ................................................................................................................................................ 117
20.2.7
Mode 1: Monitoring settings ......................................................................................................................... 118
20.2.8
Mode 2: Field settings .................................................................................................................................... 120
20.2.9
To connect the PC configurator to the outdoor unit..................................................................................... 126
20.3
Energy saving and optimum operation .......................................................................................................................... 126
20.3.1
Available main operation methods................................................................................................................ 127
20.3.2
Available comfort settings.............................................................................................................................. 128
20.3.3
Example: Automatic mode during cooling..................................................................................................... 130
20.3.4
Example: Automatic mode during heating .................................................................................................... 131
21.1
Overview: Commissioning .............................................................................................................................................. 133
21.2
Precautions when commissioning .................................................................................................................................. 133
21.3
Checklist before commissioning..................................................................................................................................... 134
21.4
About the test run........................................................................................................................................................... 135
21.5
To perform a test run...................................................................................................................................................... 136
21.6
Correcting after abnormal completion of the test run .................................................................................................. 137
21.7
Operating the unit........................................................................................................................................................... 137
23.1
Maintenance safety precautions.................................................................................................................................... 139
102
113
133
138
139
RXMLQ8 + RXYLQ10~14T7Y1B*
VRV IV system air conditioner
4P543427-1A - 2020.10
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Table of Contents
Troubleshooting
Need help?
Do you have a question about the VRV IV and is the answer not in the manual?
Questions and answers
Hi, kindly assist me with resolving the problem of the VRV IV series. It pops up from the remote control, and after checking the master and the slaves, both cannot identify their ID number. though the last error was e2. Someone messed up with the wiring, perhaps the communication cable. If we can see what cable goes to the first unit from the master, we have 16 units attached.
The troubleshooting steps for a Daikin VRV IV series system with an E2 error and communication issues between the master and slave units are:
1. Check Q1/Q2 Wiring: Inspect the wiring connections between the master and slave units at the Q1/Q2 terminals. Faulty or incorrect wiring can cause communication failures.
2. Verify Indoor-Outdoor Wiring: Ensure that the wiring between the indoor and outdoor units is correctly connected at the Q1/Q2 and F1/F2 terminals. Incorrect connections can lead to system malfunctions.
3. Check System Test Run: If the system test run was not executed or ended abnormally, perform the test run again to identify potential issues.
4. Confirm Indoor Unit Configuration: Ensure that the number of indoor units connected to the F1/F2 line does not exceed the system's capacity. Too many units can cause communication failures.
5. Inspect System Compatibility: Verify that the indoor units connected are compatible with the system (e.g., R410A, R407C, Hydrobox). Mixing incompatible units may cause communication issues.
6. Examine Outdoor Unit Wiring: Ensure that the interconnecting wiring between outdoor units in the same piping system is connected to the Q1/Q2 (Out Multi) terminals. Incorrect wiring to the F1/F2 terminals can cause system malfunctions.
Following these steps should help diagnose and resolve communication issues in the VRV IV system.
This answer is automatically generated