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18
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Piping installation
18.4.6 Step 6: To manually charge refrigerant
18.4.7 Checks after charging refrigerant
Installer and user reference guide
100
NOTICE
▪
The refrigerant charging port is connected to the piping inside the unit. The unit's
internal piping is already factory charged with refrigerant, so be careful when
connecting the charge hose.
▪
After adding the refrigerant, do not forget to close the lid of the refrigerant
charging port. The tightening torque for the lid is 11.5 to 13.9 N•m.
▪
In order to ensure uniform refrigerant distribution, it may take the compressor
±10 minutes to start up after the unit has started operation. This is not a
malfunction.
5 Proceed with the manual charge.
INFORMATION
After charging refrigerant:
▪
Record the additional refrigerant amount on the refrigerant label provided with
the unit and attach it to the backside of the front panel.
▪
Perform the test procedure described in "21 Commissioning" [
The remaining additional refrigerant charge can be charged by operating the
outdoor unit by means of the manual refrigerant charge operation mode:
1 Take all the precautions mentioned in
"21 Commissioning" [
2 Turn on the power of the indoor units and outdoor unit.
3 Activate outdoor unit setting [2‑20]=1 to start manual refrigerant charge
mode. Refer to
"Mode 2: Field
Result: The unit will start operation.
4 Valve A can be opened. Charging of remaining additional refrigerant can be
done.
5 When the remaining calculated additional refrigerant amount is added, close
valve A and push BS3 to stop the manual refrigerant charging procedure.
INFORMATION
The manual refrigerant charge operation will automatically stop within 30 minutes. If
charging is not completed after 30 minutes, perform the additional refrigerant
charging operation again.
6 Perform the test procedure as described in "21 Commissioning" [
▪
Are all stop valves open?
▪
Is the amount of refrigerant, that has been added, recorded on the refrigerant
charge label?
NOTICE
Make sure to open all stop valves after (pre-) charging the refrigerant.
Operating with the stop valves closed will damage the compressor.
4
133] into account.
4
settings" [
120] for details.
4
133].
4
"20
Configuration" [
4
133].
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VRV IV system air conditioner
4P543427-1A – 2020.10
113] and
- Quick Links:
- Error Codes: Overview
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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