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11.2 Symptoms that are NOT system malfunctions
11.2.1 Symptom: The system does not operate
11.2.2 Symptom: Cool/Heat cannot be changed over
11.2.3 Symptom: Fan operation is possible, but cooling and heating do not work
11.2.4 Symptom: The fan speed does not correspond to the setting
11.2.5 Symptom: The fan direction does not correspond to the setting
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VRV IV system air conditioner
4P543427-1A – 2020.10
The following symptoms are NOT system malfunctions:
▪
The air conditioner does not start immediately after the ON/OFF button on the
user interface is pressed. If the operation lamp lights, the system is in normal
condition. To prevent overloading of the compressor motor, the air conditioner
starts 5 minutes after it is turned ON again in case it was turned OFF just before.
The same starting delay occurs after the operation mode selector button was
used.
▪
If "Under Centralized Control" is displayed on the user interface, pressing the
operation button causes the display to blink for a few seconds. The blinking
display indicates that the user interface cannot be used.
▪
The system does not start immediately after the power supply is turned on. Wait
one minute until the micro computer is prepared for operation.
▪
When the display shows
that this is a slave user interface.
▪
When the cool/heat changeover remote control switch is installed and the
display shows
(change-over under centralized control), this is because cool/
heat changeover is controlled by the cool/ heat changeover remote control
switch. Ask your dealer where the remote control switch is installed.
Immediately after the power is turned on. The micro computer is getting ready to
operate and is performing a communication check with all indoor units. Please wait
12 minutes maximally until this process is finished.
The fan speed does not change even if the fan speed adjustment button is pressed.
During heating operation, when the room temperature reaches the set
temperature, the outdoor unit goes off and the indoor unit changes to whisper fan
speed. This is to prevent cold air blowing directly on occupants of the room. The
fan speed will not change even when another indoor unit is in heating operation, if
the button is pressed.
The fan direction does not correspond with the user interface display. The fan
direction does not swing. This is because the unit is being controlled by the micro
computer.
(change-over under centralized control), it shows
11
Troubleshooting
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Installer and user reference guide
43
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- Error Codes: Overview
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Table of Contents
Troubleshooting
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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