Error Codes: Overview; Symptoms That Are Not System Malfunctions; Symptom: The System Does Not Operate; Symptom: Cool/Heat Cannot Be Changed Over - Daikin VRV IV W+ Series Installer And User Reference Manual

In this chapter

11.1 Error codes: Overview

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

RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452191-1B - 2020.10
11.1 Error codes: Overview ............................................................................................................................................................
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 ........................................................................
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) .............................................................................................
11.2.12 Symptom: Dust comes out of the unit...................................................................................................................
11.2.13 Symptom: The units can give off odours ...............................................................................................................
11.2.14 Symptom: The outdoor unit fan does not spin .....................................................................................................
11.2.15 Symptom: The display shows "88".........................................................................................................................
11.2.16 Symptom: The compressor in the outdoor unit does not stop after a short heating operation.........................
11.2.17 Symptom: The inside of an outdoor unit is warm even when the unit has stopped ...........................................
11.2.18 Symptom: Hot air can be felt when the indoor unit is stopped............................................................................
In case a malfunction code appears on the indoor unit user interface display,
contact your installer and inform the malfunction code, the unit type, and serial
number (you can find this information on the nameplate of the unit).
For your reference, a list with malfunction codes is provided. You can, depending
on the level of the malfunction code, reset the code by pushing the ON/OFF
button. If not, ask your installer for advice.
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.
(change-over under centralized control), it shows
11 Troubleshooting
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