Daikin VRV IV - 24 Troubleshooting; 24.1 Solving Problems Based on Error Codes; 24.2 Error Codes: Overview

24 | Troubleshooting
Installer and user reference guide
142
RXMLQ8 + RXYLQ10~14T7Y1B*
VRV IV system air conditioner
4P543427-1A – 2020.10
24 Troubleshooting
In this chapter
24.1 Solving problems based on error codes................................................................................................................................. 142
24.2 Error codes: Overview ............................................................................................................................................................ 142
24.1 Solving problems based on error codes
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 Example
Main code
Sub code
With an interval of 1 second, the display will switch between main code and sub
code.
24.2 Error codes: Overview
Main code Sub code Cause Solution
Master Slave 1 Slave 2
High pressure switch was
activated (S1PH, S2PH) - A1P
(X3A; X4A)
Check stop valve situation or
abnormalities in (field) piping
or airflow over air cooled coil.
▪ Refrigerant overcharge
▪ Stop valve closed
▪ Check refrigerant amount
+recharge unit.
▪ Open stop valves
Stop valve closed (liquid) Open liquid stop valve.
▪ Refrigerant overcharge
▪ Stop valve closed
▪ Check refrigerant amount
+recharge unit.
▪ Open stop valves.