Symptom: White Mist Comes Out Of A Unit (Indoor Unit); Symptom: White Mist Comes Out Of A Unit (Indoor Unit, Outdoor Unit); Symptom: The User Interface Reads "U4" Or "U5" And Stops, But Then Restarts After A Few Minutes; Symptom: Noise Of Air Conditioners (Indoor Unit) - Daikin VRV IV Installer And User Reference Manual
System air conditioner
Table of Contents
Advertisement
11
|
Troubleshooting
11.2.6 Symptom: White mist comes out of a unit (Indoor unit)
11.2.7 Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)
11.2.8 Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few
minutes
11.2.9 Symptom: Noise of air conditioners (Indoor unit)
11.2.10 Symptom: Noise of air conditioners (Indoor unit, outdoor unit)
11.2.11 Symptom: Noise of air conditioners (Outdoor unit)
Installer and user reference guide
44
▪
When humidity is high during cooling operation. If the interior of an indoor unit is
extremely contaminated, the temperature distribution inside a room becomes
uneven. It is necessary to clean the interior of the indoor unit. Ask your dealer for
details on cleaning the unit. This operation requires a qualified service person.
▪
Immediately after the cooling operation stops and if the room temperature and
humidity are low. This is because warm refrigerant gas flows back into the indoor
unit and generates steam.
When the system is changed over to heating operation after defrost operation.
Moisture generated by defrost becomes steam and is exhausted.
This is because the user interface is intercepting noise from electric appliances
other than the air conditioner. The noise prevents communication between the
units, causing them to stop. Operation automatically restarts when the noise
ceases.
▪
A "zeen" sound is heard immediately after the power supply is turned on. The
electronic expansion valve inside an indoor unit starts working and makes the
noise. Its volume will reduce in about one minute.
▪
A continuous low "shah" sound is heard when the system is in cooling operation
or at a stop. When the drain pump (optional accessories) is in operation, this
noise is heard.
▪
A "pishi-pishi" squeaking sound is heard when the system stops after heating
operation. Expansion and contraction of plastic parts caused by temperature
change make this noise.
▪
A low "sah", "choro-choro" sound is heard while the indoor unit is stopped.
When another indoor unit is in operation, this noise is heard. In order to prevent
oil and refrigerant from remaining in the system, a small amount of refrigerant is
kept flowing.
▪
A continuous low hissing sound is heard when the system is in cooling or defrost
operation. This is the sound of refrigerant gas flowing through both indoor and
outdoor units.
▪
A hissing sound which is heard at the start or immediately after stopping
operation or defrost operation. This is the noise of refrigerant caused by flow
stop or flow change.
When the tone of operating noise changes. This noise is caused by the change of
frequency.
RXMLQ8 + RXYLQ10~14T7Y1B*
VRV IV system air conditioner
4P543427-1A – 2020.10
- Quick Links:
- Error Codes: Overview
Hide quick links:
Advertisement
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