Troubleshooting; Solving Problems Based On Error Codes; Error Codes: Overview - Daikin VRV IV Q+ Series Installer And User Reference Manual

24 Troubleshooting

In this chapter

24.1 Solving problems based on error codes

24.2 Error codes: Overview

Main code
Master
RXYQQ8~20U7Y1B
VRV IV Q+ series heat pump
4P546229-1A – 2020.10
24.1 Solving problems based on error codes................................................................................................................................. 147
24.2 Error codes: Overview ............................................................................................................................................................ 147
In case of a displayed malfunction code, perform correcting actions as explained in
the malfunction code table.
After correcting the abnormality, press BS3 to reset the malfunction code and retry
operation.
The malfunction code which is displayed on the outdoor unit will indicate a main
malfunction code and a sub code. The sub code indicates more detailed
information about the malfunction code. The malfunction code will be displayed
intermittent.
Example:
Code
Main code
Sub code
With an interval of 1 second, the display will switch between main code and sub
code.
In case other error codes appear, contact your dealer.
Sub code
Slave 1 Slave 2
Cause
High pressure switch was
activated (S1PH, S2PH, S3PH,
S4PH) - A1P (X2A , X3A, X4A)
▪ Refrigerant overcharge
▪ Stop valve closed
Stop valve closed (liquid)
▪ Refrigerant overcharge
▪ Stop valve closed
24 Troubleshooting
|
Example
Solution
Check stop valve situation or
abnormalities in (field) piping
or airflow over air cooled coil.
▪ Check refrigerant amount
+recharge unit.
▪ Open stop valves
Open liquid stop valve.
▪ Check refrigerant amount
+recharge unit.
▪ Open stop valves.
Installer and user reference guide
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