24 | Troubleshooting
Installer and user reference guide
154
REYQ8~20+REMQ5U7Y1B
VRV IV+ heat recovery
4P561154-1A – 2020.10
24 Troubleshooting
In this chapter
24.1 Solving problems based on error codes................................................................................................................................. 154
24.2 Error codes: Overview ............................................................................................................................................................ 154
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
In case other error codes appear, contact your dealer.
Main code Sub code Cause Solution
Master Slave 1 Slave 2
Earth leakage detector
activated
Restart the unit. If the problem
reoccurs, contact your dealer.
Earth leakage detector
malfunction: open circuit) - A1P
(X101A)
Check connection on PCB or
actuator.
High pressure switch was
activated (S1PH, S2PH) – main
PCB (X2A, X3A)
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.